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- Recommendation Q.1112
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- PROCEDURES FOR INTERWORKING BETWEEN INMARSAT STANDARD B SYSTEM AND THE
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- INTERNATIONAL PUBLIC SWITCHED TELEPHONE NETWORK/ISDN
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- 1 Introduction
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- This Recommendation presents the detailed procedures for interworking between INMARSAT Standard-B
- system and signalling systems of the fixed network. For a brief description of INMARSAT Standard-B system,
- see Appendix I to Recommendation Q.1111.
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- 2 Conversion of information elements
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- Tables 1/Q.1112 to 16/Q.1112 give the relationship between signals of the fixed network signalling
- systems and the INMARSAT Standard-B system.
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- 2.1 Signalling System No. 7 (TUP)
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- 2.1.1 Table 1/Q.1112 gives the relationship between forward signals in Signalling System No. 7 TUP and
- messages and information elements sent on the radio path in INMARSAT Standard-B signalling system for shore to
- ship calls, i.e. interworking of Signalling System No. 7 TUP to INMARSAT Standard-B. In the comment column
- actions taken by the MSSC are indicated, in particular for signals of TUP which have no equivalent message or
- information element in INMARSAT Standard-B.
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- Table 2/Q.1112 shows the relationship between messages and information elements in INMARSAT Standard-
- B signalling system and forward signals in Signalling System No. 7 TUP for ship-to-shore calls, i.e.
- interworking of INMARSAT Standard-B to Signalling System No. 7 TUP.
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- The signal numbers for forward signals of Signalling System No. 7 TUP are those given in Table A-5bis
- of Annex A to Recommendations Q.601-Q.608.
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- 2.1.2 Table 3/Q.1112 gives the relationship between messages and information elements in INMARSAT Standard-
- B signalling system and backward signals in Signalling System No. 7 TUP for shore-to-ship calls, i.e,
- interworking of Signalling System No. 7 to INMARSAT Standard-B.
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- Backward signals in Signalling System No. 7 TUP generated by the MSSC for unsuccessful shore- to-ship
- calls are given in Table 3bis/Q.1112. These signals are not related to any specific message or information
- element received from the ship earth station.
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- Table 4/Q.1112 gives the relationship between backward signals in Signalling System No. 7 TUP and
- messages and information elements in INMARSAT Standard-B signalling system for ship-to-shore calls, i.e.
- interworking of INMARSAT Standard-B to Signalling System No. 7 TUP. The comments column indicates specific
- actions taken by the MSSC.
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- The signal numbers for backward signals of Signalling System No. 7 TUP are those given in Table A-9bis
- of Annex A to Recommendations Q.601-Q.608.
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- 2.2w Signalling System R2w
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- 2.2.1 Tables 5/Q.1112 and 6/Q.1112 are similar to Tables 1/Q.1112 and 2/Q.1112, respectively, and apply to
- forward signals in Signalling System R2.
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- Fascicle VI.14 - Rec. Q.1112 1
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- The signal numbers for forward signals of Signalling System R2 are those of Table A-7 of Annex A to
- Recommendations Q.601-Q.608.
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- 2.2.2 Tables 7/Q.1112, 7bis/Q.1112 abd 8/Q.1112 are similar to Tables 3/Q.1112, 3bis/Q.1112 and 4/Q.1112,
- respectively, and appy to backward signals in Signalling System R2.
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- The signal numbers for backward signals in Signalling System R2 are those of Table A-11 of Annex A to
- Recommendations Q.601-Q.608.
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- 2.3w Signalling System No. 7 (ISUP)w
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- The relationship between forward and backward signals of Signalling System No. 7 ISUP and messages and
- information elements of INMARSAT Standard-B signalling system is for further study.
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- Tables 9/Q.1112 through 12/Q.1112 are reserved for this purpose.
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- 2.4w Signalling System No. 5w
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- 2.4.1 Tables 12/Q.1112 and 14/Q.1112 are similar to Tables 1/Q.1112 and 2/Q.1112, respectively, and apply to
- forward signals in Signalling System No. 5.
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- the signal numbers for forward signals in Signalling System No. 5 are those given in Table A-4 Annex A
- to Recommendations Q.601-Q.608.
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- 2.4.2 Tables 15/Q.1112, 15bis/Q.1112 and 16/Q.1112 are similar to Tables 3/Q.1112, 3bis/Q.1112 and
- 4/Q.1112, respectively, and apply to backward signals in Signalling System No. 5.
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- The signal numbers for backward signals in Signalling System No. 5 are those given in Table A-8 of
- Annex A to Recommendations Q.601-Q.608.
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- 2 Fascicle VI.14 - Rec. Q.1112
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- TABLE 1/Q.1112
-
- Conversion of forward signals in Signalling System No. 7 TUP
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌────────────────────────────────────┬─────────────────────────────┬──────────
- ──────────┐
- │ Signalling System No. 7 │ INMARSAT Standard-B
- │ │
- ├──────┬─────────────────────────────┼─────────────────────────────┤
- Comments │
- │Signal│ Signal name │ Message:
- │ │
- │ No. │ │ info element: value
- │ - │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │ │ Announcement message:
- │ │
- │ 1 │ Address signals │ SES number, called terminal
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Nature of address indicator │ - │ Interpreted
- and │
- │ 2 │national significant number │ │ used by
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Nature of address indicator │ │ Interpreted
- and │
- │ 3 │international number │ - │ used by
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Nature of circuit indicator │ │ Ignored
- by │
- │ 4 │one satellite in connection │ - │
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Nature of circuit indicator │ │ Ignored
- by │
- │ 5 │one satellite in connection │ - │
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Echo suppressor indicator │ │ MSSC will
- insert │
- │ 6 │out-going half-echo │ - │echo control
- device │
- │ │suppressor not included │ │ if
- needed │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Echo suppressor indicator │ │ Interpreted
- and │
- │ 7 │out-going half-echo │ - │ used by
- MSSC │
- │ │suppressor included │
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Calling party's category │ Assignment message:
- │ │
- │ 8-12 │indicator, language digit │ service: telephone
- │ - │
- │ │ │ priority: routine
- │ │
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- Fascicle VI.14 - Rec. Q.1112 3
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- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Calling party's category │ Assignment message:
- │ │
- │ 13 │indicator, ordinary calling │ service: telephone
- │ - │
- │ │subscriber │ priority: routine
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Calling party's category │ Assignment message:
- │ │
- │ 14 │indicator, calling │ service: telephone
- │ - │
- │ │subscriber with priority │ priority: further study
- │ │
- └──────┴─────────────────────────────┴─────────────────────────────┴────────────────────┘
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- 4 Fascicle VI.14 - Rec. Q.1112
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- TABLE 1/Q.1112 w(contd.)w
-
- Conversion of forward signals in Signalling System No. 7 TUP
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
-
- w
- ┌────────────────────────────────────┬─────────────────────────────┬──────────
- ──────────┐
- │ Signalling System No. 7 │ INMARSAT Standard-B
- │ │
- ├──────┬─────────────────────────────┼─────────────────────────────┤
- Comments │
- │Signal│ Signal name │ Message:
- │ │
- │ No. │ │ info element: value
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Calling party's category │ │ Not
- applicable │
- │ 15 │indicator, data call │ -
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ 16 │Clear forward signal │ Channel release message
- │ │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ 17 │Forward transfer signal │ - │ Not
- applicable │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ 18 │Continuity proved │ - │ Interpreted
- and │
- │ │ │ │ used by
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ 19 │Continuity check failure │ Channel release message
- │ - │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Continuity check required │ - │ Interpreted
- by │
- │ 20 │on this circuit │ │
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Continuity check not │ - │ Interpreted
- by │
- │ 21 │required on this circuit │ │
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Continuity check performed │ - │ Interpreted
- and │
- │ 22 │on previous circuit │ │ used by
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │Service information │ - │ Interpreted
- by │
- │ 23 │ │ │
- MSSC │
- ├──────┼─────────────────────────────┼─────────────────────────────┼────────────────────┤
- │ │General setup message │ - │ Interpreted
- by │
- │ 24 │ │ │
- MSSC │
- │ │ │
- │ │
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- Fascicle VI.14 - Rec. Q.1112 5
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- └──────┴─────────────────────────────┴─────────────────────────────┴────────────────────┘
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- 6 Fascicle VI.14 - Rec. Q.1112
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- TABLE 2/Q.1112
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- Conversion of forward signals in Signalling System No. 7 TUP
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌──────────────────────────────────────┬──────────────────────────────────────
- ┐
- │INMARSAT standard-B │ Signalling system No. 7 │
- ├──────────────────────────────────────┼───────────────────────────┬──────────┤
- │Message: info element: value │ Signal name │Signal No.│
- ├──────────────────────────────────────┼───────────────────────────┼──────────┤
- │Address message: │ Address signals: │ 1 │
- │called number │Nature of address indicator│ 2 or 3 │
- ├──────────────────────────────────────┼───────────────────────────┼──────────┤
- │Request message: │Calling party's category │ │
- │-priority: routine │ indicator, ordinary │ 13 │
- │-service: telephone or 3.1 kHz audio │ calling subscriber │ │
- ├──────────────────────────────────────┼───────────────────────────┼──────────┤
- │Request message: │Calling party's category │ │
- │-priority: urgency, safety or distress│indicator, calling │ 14 │
- │-service: telephone or 3.1 kHz audio │subscriber with priority │ │
- ├──────────────────────────────────────┼───────────────────────────┼──────────┤
- │Channel release message │ Clear forward signal │ 16 │
- ├──────────────────────────────────────┼───────────────────────────┼──────────┤
- │ │ Continuity check │ │
- │Continuity check tone │ performed on previous │ 22 │
- │ │ circuit │ │
- └──────────────────────────────────────┴───────────────────────────┴──────────┘
- w
- wNotew - Nature of circuit indicator, one satellite in connection (Signal No. 5) is
- generated by the MSSC.
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- Fascicle VI.14 - Rec. Q.1112 7
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- TABLE 3/Q.1112
-
- Conversion of backward signals in Signalling System No. 7 TUP
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌─────────────────────────────────┬───────────────────────────────────────────
- ┐
- │INMARSAT standard-B │ Signalling system No. 7 │
- ├─────────────────────────────────┼────────────────────────────────┬──────────┤
- │Message: info element: value │ Singal name │Signal No.│
- ├─────────────────────────────────┼────────────────────────────────┼──────────┤
- │Continuity check tone │ AFC: Address complete │ 4 │
- │ │ subscriber free, charge │ │
- ├─────────────────────────────────┼────────────────────────────────┼──────────┤
- │Connect message │ ANC: Answer charge │ 16 │
- ├─────────────────────────────────┼────────────────────────────────┼──────────┤
- │Channel release message │ CLB: Clear back │ 19 │
- ├─────────────────────────────────┼────────────────────────────────┼──────────┤
- │Call result: cause value: │ │ │
- │-user busy │ SGB: Subscriber busy │ 12 │
- │-no channel available │ CGC: Circuit group congestion │ 8 │
- │-destination out of service │ LOS: Line out of service │ 13 │
- │-others │ SST: Send special info tone │ 14 │
- └─────────────────────────────────┴────────────────────────────────┴──────────┘
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- 8 Fascicle VI.14 - Rec. Q.1112
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- TABLE 3bis/Q.1112
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- Unsuccessful call events and backward signals in
- Signalling System No. 7 TUP
- shore-to-ship calls
- w
- ┌──────────────────────────────────┬──────────────────────────────────────────
- ┐
- │INMARSAT standard-B │ Signalling system No. 7 │
- ├──────────────────────────────────┼──────────────────────────────┬───────────┤
- │Event in INMARSAT system │ Signal name │ Signal No.│
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │Congestion in MSSC │ SEC: switching equipment │ 7 │
- │ │ congestion │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │No satellite channel available │ NNC: National network │ 9 │
- │ │ congestion │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │Incomplete SES number │ ADI: Address incomplete │ 10 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │Unallocated SES number │ UNN: Unallocated number │ 11 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │SES busy │ SGB: Subscriber busy │ 12 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │Continuity test failure │ LOS: Line out of service │ 13 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │SES absent (no response) │ SST: Send special │ 14 │
- │ │ information tone │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │SES barred for incoming access │ SST: Send special │ 14 │
- │ │ information tone │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │SES unauthorized │ SST: Send special │ 14 │
- │ │ information tone │ │
- └──────────────────────────────────┴──────────────────────────────┴───────────┘
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- Fascicle VI.14 - Rec. Q.1112 9
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- TABLE 4/Q.1112
-
- Conversion of backward signals in Signalling System No. 7 TUP
- and INMARSAT Standard B Signalling System
- ship-to-shore calls
- w
- ┌───────────────────────────────────┬─────────────────────────────────────────
- ┐
- │ Signalling system No. 7 │ INMARSAT standard-B │
- ├──────┬────────────────────────────┼───────────────────────┬─────────────────┤
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │ │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 1 │ ADC: Address complete, │ - │Connect through │
- │ │ charge │ │ circuit │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 2 │ ADN: Address complete, │ │No-charge infor- │
- │ │ no charge │ - │ mation used by │
- │ │ │ │ MSSC only │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 3 │ ADX: Address complete, │ - │Connect through │
- │ │ coinbox │ │ circuit │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 4 │ AFC: Address complete, │ - │Connect through │
- │ │ subscriber free, charge │ │ circuit │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 5 │ AFN: Address complete, │ │No-charge infor- │
- │ │ subscriber free, no charge │ - │ mation used by │
- │ │ │ │ MSSC only │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ 6 │ AFX: Address complete, │ - │ Connect through │
- │ │ subscriber free, coinbox │ │ circuit │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 7 │ SEC: Switching equipment │ international network,│ - │
- │ │ congestion │ switching equipment │ │
- │ │ │ congestion │ │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ CGC: Circuit-group │ Call result message: │ │
- │ 8 │ congestion │ international network,│ - │
- │ │ │ no channel available │ │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 9 │ NNC: National network │ remote public network,│ - │
- │ │ congestion │ switching equipment │ │
- │ │ │ congestion │ │
- ├──────┼────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 10 │ ADI: Address incomplete │remote public network, │ - │
- │ │ │invalid number format │ │
- └──────┴────────────────────────────┴───────────────────────┴─────────────────┘
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- 10 Fascicle VI.14 - Rec. Q.1112
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- TABLE 4/Q.1112w (contd.)w
-
- Conversion of backward signals in Signalling System No. 7 TUP
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌──────────────────────────────────┬──────────────────────────────────────────
- ┐
- │ Signalling system No. 7 │ INMARSAT standard-B │
- ├──────┬───────────────────────────┼────────────────────────┬─────────────────┤
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │
- │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 11 │ UNN: Unallocated number │remote public network, │ - │
- │ │ │ unassigned number │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 12 │ SGB: Subscriber busy │remote public network, │ - │
- │ │ │ user busy │ │
- │ │ │ Call result message: │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ 13 │ LOS: line out of service │ remote public network, │ - │
- │ │ │ destination out of │ │
- │ │ │ service │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ SST: Send special │ Call result message: │ │
- │ 14 │ information tone │ international network, │ - │
- │ │ │ unspecified │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 15 │ CFL: Call failure │ international network, │ - │
- │ │ │ unspecified │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ 16 │ ANC: Answer, charge │ Connect message │ - │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ │ No-charge │
- │ 17 │ ANN: Answer, no charge │ Connect message │ information │
- │ │ │ │used by MSSC only│
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ │ Clearback │
- │ 18 │ RAN: Reanswer │ │ supervision done│
- │ │ │ │ by MSSC │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ │ │ Clearback │
- │ 19 │ CLB: Clearback │ Channel release │ supervision │
- │ │ │ │ done by MSSC │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ 20 │ GRQ: General request │ - │ Interpreted by │
- │ │ message │ │ MSSC │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ │ Call unsuccessful │ Call result message: │ │
- │ 21 │ access barred │ remote public network, │ - │
- │ │ │ unspecified │ │
- ├──────┼───────────────────────────┼────────────────────────┼─────────────────┤
- │ 22 │ DPN: Call unsuccessful │ - │ For further │
- │ │digital path not provided │ │ study │
- └──────┴───────────────────────────┴────────────────────────┴─────────────────┘
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- Fascicle VI.14 - Rec. Q.1112 11
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- TABLE 5/Q.1112
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- Conversion of forward signals in Signalling System R2 and
- INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌────────────────────────────────────┬─────────────────────┬──────────────────
- ┐
- │ Signalling system R2 │ INMARSAT standard-B │ │
- ├──────┬─────────────────────────────┼─────────────────────┤ │
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │
- │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │ │Announcement message:│ │
- │ 1 │ Address signals │ SES number, called │ - │
- │ │ │ terminal │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 2-7 │ Language digit, │ - │ Ignored by MSSC │
- │ │ discriminating digit │ │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │I-11: Country code indicator,│ │MSSC will suppress│
- │ │ outgoing half-echo │ │ the country code │
- │ 8 │ suppressor required │ - │ and insert echo │
- │ │ │ │ control device if│
- │ │ │ │ needed │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │I-12: Country code indicator,│ │ The MSSC will │
- │ 9 │ no echo suppressor │ - │ suppress the │
- │ │ required │ │ country code │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │I-14: Country code indicator,│ │ The MSSC will │
- │ 10 │ incoming half-echo │ - │ suppress the │
- │ │ suppressor required │ │ country code │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 11 │I-14: Incoming half-echo │ - │ Interpreted by │
- │ │ suppressor required │ │ MSSC │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │II-7: Calling party's │ Assignment message: │ │
- │ 12 │ category, subscriber or│ -service: telephone │ - │
- │ │ operation without │ -priority: routine │ │
- │ │ forward transfer │ │ │
- │ │ facility │ │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │II-8: Calling party's │ │ │
- │ 13 │ category, data │ - │ Not applicable │
- │ │ transmission control │ │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │II-9: Calling party's │ Assignment message: │ │
- │ 14 │ category, subscriber │ -service: telephone │ - │
- │ │ with priority │ -priority: for │ │
- │ │ │ further study │ │
- └──────┴─────────────────────────────┴─────────────────────┴──────────────────┘
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- 12 Fascicle VI.14 - Rec. Q.1112
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- TABLE 5/Q.1112 (contd)
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- ┌────────────────────────────────────┬─────────────────────┬──────────────────
- ┐
- │ Signalling system R2 │ INMARSAT standard-B │ │
- ├──────┬─────────────────────────────┼─────────────────────┤ │
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ │II-10: Calling party's │ Assignment message: │ │
- │ 15 │ category, operator │ -service telephone │ - │
- │ │ with forward transfer │ -priority: routine │ │
- │ │ facility │ │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 16 │ Clear forward signal │ Channel release │ - │
- │ │ │ message │ │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 17 │ Forward transfer signal │ - │ Not applicable │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 18 │ First digit I-1......I-10 │ - │ Interpreted and │
- │ │ │ │ used by MSSC │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │ 19 │ Reply to A-14 │ - │ Not applicable │
- ├──────┼─────────────────────────────┼─────────────────────┼──────────────────┤
- │20-21 │ Reply to A-13 │ - │ Not applicable │
- └──────┴─────────────────────────────┴─────────────────────┴──────────────────┘
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- TABLE 6/Q.1112
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- Conversion of forward signals in Signalling System R2
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
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- ┌────────────────────────────────┬────────────────────────────────────────────
- ┐
- │ INMARSAT standard-B │ Signalling system R2 │
- ├────────────────────────────────┼─────────────────────────────┬──────────────┤
- │ Message: info element: value │ Signal name │ Signal No. │
- ├────────────────────────────────┼─────────────────────────────┼──────────────┤
- │ Address message: │ Address signals: │ 1 │
- │ called number │ Country code indicator │ 10 │
- ├────────────────────────────────┼─────────────────────────────┼──────────────┤
- │ Request message: │ II-7: Calling party's │ │
- │ -priority: routine │ category, subscriber │ 12 │
- │ -service: telephone or │ or operator without │ │
- │ 3.1 kHz audio │ forward transfer facility │ │
- ├────────────────────────────────┼─────────────────────────────┼──────────────┤
- │ Request message: │ │ │
- │ -priority: urgency, safety │ II-9: Calling party's │ │
- │ or distress │ category, subscriber with │ 14 │
- │ -service: telephone or │ priority │ │
- │ 3.1 kHz audio │ │ │
- ├────────────────────────────────┼─────────────────────────────┼──────────────┤
- │ Channel release message │ Clear forward signal │ 16 │
- ├────────────────────────────────┼─────────────────────────────┼──────────────┤
- │ Continuity check tone │ Not applicable │ - │
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- Fascicle VI.14 - Rec. Q.1112 13
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- └────────────────────────────────┴─────────────────────────────┴──────────────┘
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- 14 Fascicle VI.14 - Rec. Q.1112
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- TABLE 7/Q.1112
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- Conversion of backward signals in Signalling System R2
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌───────────────────────────────────┬─────────────────────────────────────────
- ┐
- │ INMARSAT standard-B │ Signalling system R2 │
- ├───────────────────────────────────┼────────────────────────────┬────────────┤
- │ Message: info element: value │ Signal name │ Signal No. │
- ├───────────────────────────────────┼────────────────────────────┼────────────┤
- │ Continuity check tone │ International, subscriber │ 13 │
- │ │ line free, charge │ │
- ├───────────────────────────────────┼────────────────────────────┼────────────┤
- │ Connect message │ Answer signal │ 11 │
- ├───────────────────────────────────┼────────────────────────────┼────────────┤
- │ Channel release message │ Clear back signal │ 12 │
- ├───────────────────────────────────┼────────────────────────────┼────────────┤
- │Call result message: cause value: │ │ │
- │ -user busy │ Subscriber line busy │ 5 │
- │ -no Channel available │ Congestion on the national │ 1 │
- │ │ network │ │
- │ -destination out of service │Subscriber line out of order│ 10 │
- │ -others │ International, send │ 14 │
- │ │ special info tone │ │
- └───────────────────────────────────┴────────────────────────────┴────────────┘
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- Fascicle VI.14 - Rec. Q.1112 15
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- TABLE 7bis/Q.1112
-
- Unsuccessful call events and backward signals in
- Signalling System R2
- shore-to-ship calls
- w
- ┌──────────────────────────────────┬──────────────────────────────┬───────────
- ┐
- │ INMARSAT standard-B │ Signalling system R2 │ │
- ├──────────────────────────────────┼──────────────────────────────┤ Signal No.│
- │ Event in INMARSAT system │ Signal name │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ │ A-4: Congestion on the │ 1 │
- │ Congestion in MSSC │ national network │ │
- │ │ or │ or │
- │ │ B-4: Congestion │ 6 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ │ A-4: Congestion on the │ 1 │
- │ No satellite channel available │ national network │ │
- │ │ or │ or │
- │ │ B-4: Congestion │ 6 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ Incomplete SES number │ B-5: Unallocated number │ 7 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ Unallocated SES number │ B-5: Unallocated number │ 7 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ SES busy │ B-3: Subscriber line busy │ 5 │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ Continuity test failure │ B-8: Subscriber line │ 10 │
- │ │ out of order │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ SES absent (no response) │ B-2: Send special │ 4 │
- │ │ information tone │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ SES barred for incoming │ B-2: Send special │ 4 │
- │ access │ information tone │ │
- ├──────────────────────────────────┼──────────────────────────────┼───────────┤
- │ SES unauthorised │ B-2: Send special │ 4 │
- │ │ information tone │ │
- └──────────────────────────────────┴──────────────────────────────┴───────────┘
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- 16 Fascicle VI.14 - Rec. Q.1112
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- TABLE 8/Q.1112
-
- Conversion of backward signals in Signalling System R2
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌────────────────────────────────────┬────────────────────────────────────────
- ┐
- │ Signalling system R2 │ INMARSAT standard-B │
- ├──────┬─────────────────────────────┼───────────────────────┬────────────────┤
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ │ Call result message: │ │
- │ 1 │ A-4: Congestion on the │ remote public network │ │
- │ │ national network │ switching equipment │ │
- │ │ │ congestion │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ 2 │A-6: Address complete charge,│ - │ Connect through│
- │ │ set up speech conditions │ │ circuit │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ A-15: Congestion in an │ Call result message: │ │
- │ 3 │ international exchange or │ international network,│ - │
- │ │ at its output │ switching equipment │ │
- │ │ │ congestion │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ B-2: Send special │ Call result message: │ │
- │ 4 │ information tone │ remote public network,│ - │
- │ │ │ unspecified │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ │ Call result message: │ │
- │ 5 │ B-3: Subscriber line busy │ remote public network,│ - │
- │ │ │ user busy │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ │ Call result message: │ │
- │ 6 │ B-4: Congestion │ remote public network,│ - │
- │ │ │ switching equipment │ │
- │ │ │ congestion │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ │ Call result message: │ │
- │ 7 │ B-5: Unallocated number │ remote public network,│ - │
- │ │ │ unassigned number │ │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ 8 │ B-6: Subscriber line free, │ - │ Connect through│
- │ │ charge │ │ circuit │
- ├──────┼─────────────────────────────┼───────────────────────┼────────────────┤
- │ │ B-7: Subscriber line free, │ │No-charge infor-│
- │ 9 │ no charge │ - │ mation used by │
- │ │ │ │ MSSC only │
- └──────┴─────────────────────────────┴───────────────────────┴────────────────┘
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- Fascicle VI.14 - Rec. Q.1112 17
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- TABLE 8/Q.1112 w(contd.)w
-
- Conversion of backward signals in Signalling System R2
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌────────────────────────────────────┬────────────────────────────────────────
- ─┐
- │ Signalling system R2 │ INMARSAT standard-B │
- ├──────┬─────────────────────────────┼───────────────────────┬─────────────────┤
- │Signal│ Signal name │ Message: │ Comments │
- │ No. │ │ info element: value │ │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 10 │ B-8: Subscriber line │ remote public network,│ - │
- │ │ out of order │ destination out of │ │
- │ │ │ service │ │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ 11 │ Answer signal │ Connect message │Clearback super- │
- │ │ │ │ vision by MSSC │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ 12 │ Clear back signal │ Channel release │ - │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ 13 │ B-1: International, sub- │ - │ Connect through │
- │ │ scriber line free, charge │ │ circuit │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ B-9, B-10: International, │ Call result message: │ │
- │ 14 │ send special information │international network, │ - │
- │ │ tone │ unspecified │ │
- ├──────┼─────────────────────────────┼───────────────────────┼─────────────────┤
- │ │ │ Call result message: │ │
- │ 15 │ B-11 to B-15 │ remote public network,│ - │
- │ │ │ switching equipment │ │
- │ │ │ congestion │ │
- └──────┴─────────────────────────────┴───────────────────────┴─────────────────┘
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- 18 Fascicle VI.14 - Rec. Q.1112
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- TABLE 9/Q.1112
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- Conversion of forward signals in Signalling System No. 7
- ISUP and INMARSAT Standard-B Signalling System
- shore-to-ship calls
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- For further study.
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- TABLE 10/Q.1112
-
- Conversion of forward signals in Signalling System No. 7
- ISUP and INMARSAT Standard-B Signalling System
- ship-to-shore calls
-
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- For further study.
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- TABLE 11/Q.1112
-
- Conversion of backward signals in Signalling System No. 7
- ISUP and INMARSAT Standard-B Signalling System
- shore-to-ship calls
-
-
- For further study.
-
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- TABLE 11bis/Q.1112
-
- Unsuccessful call events and backward signals in
- Signalling System No. 7 ISUP and
- INMARSAT Standard-B Signalling System
- shore-to-ship calls
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- For further study.
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- TABLE 12/Q.1112
-
- Conversion of backward signals in Signalling System No. 7
- ISUP and INMARSAT Standard-B Signalling System
- ship-to-shore calls
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- For further study.
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- Fascicle VI.14 - Rec. Q.1112 19
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- TABLE 13/Q.1112
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- Conversion of forward signals in Signalling System No. 5
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌───────────────────────────────┬───────────────────────────────┬─────────────
- ───┐
- │ Signalling system No. 5 │ INMARSAT standard-B │ │
- ├───────┬───────────────────────┼───────────────────────────────┤ │
- │ Signal│ Signal name │ Message: info element: │ Comments │
- │ No. │ │ value │ │
- ├───────┼───────────────────────┼───────────────────────────────┼────────────────┤
- │ 1 │ Address signal │ Announcement message: │ - │
- │ │ │ -SES number, called terminal│ │
- │ │ │ │ │
- │ 2-16 │ Language digit │ - │ Interpreted by │
- │ │ │ │ MSSC │
- │ │ │ │ │
- │ 7 │ Discriminating digit O│ Announcement message: │ - │
- │ │ │ -service: telephone │ │
- │ │ │ │ │
- │ 8 │ Start of pulsing KP1 │ - │ Interpreted by │
- │ │ │ │ MSSC │
- │ │ │ │ │
- │ 9 │ Start of pulsing KP2 │ - │ Interpreted by │
- │ │ │ │ MSSC │
- │ │ │ │ │
- │ 10 │ Clear forward message │ Channel release │ - │
- │ │ │ │ │
- │ 11 │ Forward transfer │ - │ Not applicable │
- └───────┴───────────────────────┴───────────────────────────────┴────────────────┘
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- TABLE 14/Q.1112
-
- Conversion of forward signals in Signalling System No. 5
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌───────────────────────────────────┬─────────────────────────────────────────
- ┐
- │ INMARSAT standard-B │ signalling system No. 5 │
- ├───────────────────────────────────┼─────────────────────────┬───────────────┤
- │ Message: info element: value │ Signal name │ Signal No. │
- ├───────────────────────────────────┼─────────────────────────┼───────────────┤
- │ Address Message: Called number │ Address signals │ 1 │
- │ │ start of pulsing KP1 or │ 8 │
- │ │ start of pulsing KP2 │ 9 │
- │ │ │ │
- │ Continuity check tone │ Not applicable │ - │
- │ │ │ │
- │ Channel release message │ Clear forward │ 10 │
- │ │ │ │
- │ Request message: │ Discriminating digit O │ 7 │
- │ -priority: routine │ │ │
- │ -service: telephone or │ │ │
- │ 3.1 kHz audio │ │ │
- │ │ │ │
- │ Request message: │ Discriminating digit O │ 7 │
- │ -priority: urgency, safety │ │ │
- │ or distress │ │ │
- │ -service: telephone or │ │ │
-
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- 20 Fascicle VI.14 - Rec. Q.1112
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- │ 3.1 kHz audio │ │ │
- └───────────────────────────────────┴─────────────────────────┴───────────────┘
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- Fascicle VI.14 - Rec. Q.1112 21
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- TABLE 15/Q.1112
-
- Conversion of backward signals in Signalling System No. 5
- and INMARSAT Standard-B Signalling System
- shore-to-ship calls
- w
- ┌───────────────────────────────────┬─────────────────────────────────────────
- ┐
- │ INMARSAT standard-B │ Signalling system No.5 │
- ├───────────────────────────────────┼───────────────────────────────┬─────────┤
- │Message: info element: value │ Signal name │ Signal │
- │ │ │ No. │
- ├───────────────────────────────────┼───────────────────────────────┼─────────┤
- │ Continuity check tone │ Inform that ST has been sent │ 5 │
- │ │ │ │
- │ Connect message │ Answer signal │ 2 │
- │ │ │ │
- │ Channel release │ Clear back │ 3 │
- │ │ │ │
- │ Call attempt result: Cause value │ │ │
- │ -User busy │ Busy flash signal │ 1 │
- │ -No channel available │ Busy flash signal │ 1 │
- │ -Destination out of service │ Information tone (Note) │ - │
- │ -Others │ Information tone (Note) │ - │
- └───────────────────────────────────┴───────────────────────────────┴─────────┘
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- wNotew - May include appropriate recorded announcement.
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- TABLE 15bis/Q.1112
-
- Unsuccessful call events and backward signals in
- Signalling System No. 5
- shore-to-ship calls
- w
-
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- ┌───────────────────────────────────┬─────────────────────────────────────────
- ┐
- │ Events in INMARSAT system │ Signalling system No. 5 │
- ├───────────────────────────────────┼───────────────────────────┬─────────────┤
- │ Message: info element: value │ Signal name │ Signal No. │
- ├───────────────────────────────────┼───────────────────────────┼─────────────┤
- │ Congestion in MSSC │ Busy flash │ 1 │
- │ │ │ │
- │ No satellite channel available │ Busy flash │ 1 │
- │ │ │ │
- │ SES busy │ Busy flash │ 1 │
- │ │ │ │
- │ Incomplete SES number │ Information tone (Note) │ - │
- │ │ │ │
- │ Unallocated SES number │ Information tone (Note) │ - │
- │ │ │ │
- │ Continuity test failure │ Information tone (Note) │ - │
- │ │ │ │
- │ SES absent │ Information tone (Note) │ - │
- │ │ │ │
- │ SES barred │ Information tone (Note) │ - │
- │ │ │ │
- │ SES unauthorised │ Information tone (Note) │ - │
- └───────────────────────────────────┴───────────────────────────┴─────────────┘
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- 22 Fascicle VI.14 - Rec. Q.1112
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- wNotew - May include appropriate recorded announcement
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- TABLE 16/Q.1112
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- Conversion of backward signals in Signalling System No. 5
- and INMARSAT Standard-B Signalling System
- ship-to-shore calls
- w
- ┌───────────────────────────────┬────────────────────────────────┬────────────
- ┐
- │Signalling system No. 5 │ INMARSAT standard-B │ │
- ├───────────┬───────────────────┼────────────────────────────────┼────────────┤
- │Signal No. │ Signal name │ Message: info element: value │ Comments │
- ├───────────┼───────────────────┼────────────────────────────────┼────────────┤
- │ 1 │ Busy Flash │ Call Result: international │ │
- │ │ │ network, unspecified │ │
- │ │ │ │ │
- │ 2 │ Answer signal │ Connect │ │
- │ │ │ │ │
- │ 3 │ Clear back │ Channel release │ │
- │ │ │ │ │
- │ 4 │ Proceed to send │ - │ │
- │ │ │ │ │
- │ 5 │ Inform that ST has│ - │ │
- │ │ been sent │ │ │
- └───────────┴───────────────────┴────────────────────────────────┴────────────┘
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- 3 Incoming INMARSAT procedures (ship-to-shore calls)
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- Figure 1/Q.1112 contains the procedures for the incoming INMARSAT Standard-B
- system.
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- This description only includes those aspects of the INMARSAT Standard-B system
- which have to be implemented for interworking purposes. Internal procedures, such as
- those required for setting up/clearing the satellite channel, are not shown. This also
- applies to pre-emption procedures for assigning channels to distress calls.
-
- The following details should be noted.
-
- 3.1 A call is initiated by a ship earth station (SES), by means of an "access request"
- message. The coast earth station (CES) begins to set up a channel for the voice
- communication, upon receipt of this message. The call may be aborted at this point, if
- the requested service is not available, a satellite circuit is not available, or the
- calling SES is not authorized. The SES is informed of the call abortion by means of a
- "call result" message.
-
- 3.2 The called address and other information required for call set-up is contained in
- the service address message received from the ship.
-
- Digit analysis (SPITE 12) commences when the service address has been received.
- This includes also check of address validity, and translation of prefixes to the
- appropriate destination number.
-
- Unsuccessful events, shown as SPITEs 13, 15, 16, 17, 18 and 19, are indicated to
- the ship earth station by call result message with the cause field set as shown in Table
- 17/Q.1112.
-
- The calling party's category indications used are related to information elements
-
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- 23 Fascicle VI.14 - Rec. Q.1112
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- of the request message as shown in Table 18/Q.1112.
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- TABLE 17/Q.1112
-
-
- Relationship between result of digit analysis
- and cause field in call result messages
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- ┌───────────────────────────────┬─────────────────────────────────────────────┐
- │ SPITE │ Cause field │
- ├───────────────────────────────┼─────────────────────────────────────────────┤
- │13: Digit analysis │ Local network, invalid number format │
- │ │ │
- │15: Unallocated number │ Local network, unassigned number │
- │ │ │
- │16: Unprovided routing │ Local network, no route to destination │
- │ │ │
- │17: Barred routing │ Local network, call rejected │
- │ │ │
- │18: Switching equipment │ Local network, switching equipment │
- │ congestion │ congestion │
- │ │ │
- │19: Circuit group congestion │ Local network, no circuit available │
- └───────────────────────────────┴─────────────────────────────────────────────┘
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- Fascicle VI.14 - Rec. Q.1112 24
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- TABLE 18/Q.1112
-
- Calling Party's category indications used for calls in
- INMARSAT Standard-B Signalling System
- w
- ┌──────────────────────────────────────────┬──────────────────────────────────
- ┐
- │ INMARSAT information elements │ Calling party's category fite │
- ├──────────────────────────────────────────┼──────────────────────────────────┤
- │ Priority: routine │ 17: Subscriber, ordinary call │
- │ Service: telephone or 3.1 kHz audio │ │
- │ │ │
- │ Priority: urgency, safety or distress │ 18: Subscriber, call with │
- │ Service: telephone or 3.1 kHz audio │ priority │
- └──────────────────────────────────────────┴──────────────────────────────────┘
- w
-
- 3.3 The interworking procedure is activated when countinuity of the satellite circuit
- has been established. If there is no outgoing circuit available in the MSSC at that time,
- the satellite circuit is cleared by a call result message with the cause field set to
- "local network, no circuit available".
-
- 3.4 Upon receipt of an address complete indication (BITE 27) or an address complete,
- subscriber free signal (BITEs 5, 6 or 7) the circuit is through-connected in the MSSC in
- order to allow supervisory tones to be passed to the ship earth station.
-
- 3.5 For unsuccessful call set-up one of the following BITEs may be received from the
- interworking procedure: BITEs 9 through 17, 19 and 20. The corresponding cause indicated
- in the call result message sent to the ship earth station should be as shown in Table
- 19/Q.1112.
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- 25 Fascicle VI.14 - Rec. Q.1112
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- TABLE 19/Q.1112
-
- Relationship between unsuccessful call BITEs and cause field
- in call result messages
-
- w
- ┌──────────────────────────────────────────┬──────────────────────────────────
- ┐
- │ BITE │ Cause field │
- ├──────────────────────────────────────────┼──────────────────────────────────┤
- │ 9: Switching equipment congestion │ International network, switching │
- │ │ equipment congestion │
- │ │ │
- │10: Circuit group congestion │ International network, no channel│
- │ │ available │
- │ │ │
- │11: Switching equipment congestion │ International network, switching │
- │ or circuit group congestion │ equipment congestion │
- │ │ │
- │12: National network congestion │ Remote public network, switching │
- │ │ equipment congestion │
- │ │ │
- │13: Address complete, national │ Remote public network switching │
- │ network congestion │ equipment congestion │
- │ │ │
- │14: Address incomplete │ Remote public network, invalid │
- │ │ number format │
- │ │ │
- │15: Unallocated number │ Remote public network, unassigned│
- │ │ number │
- │ │ │
- │16: Address complete, subscriber busy │ Remote public network, user busy │
- │ │ │
- │17: Address complete, line out of service │ Remote public network, │
- │ │ destination out of service │
- │ │ │
- │19: Call failure │ International network, │
- │ │ unspecified │
- │ │ │
- │20: Send special information tone │ International network, │
- │ │ unspecified │
- └──────────────────────────────────────────┴──────────────────────────────────┘
- w
- wNotew - See also Tables 4/Q.1112, 8/Q.1112 and 16/Q.1112.
-
-
-
- 3.6 The connect message is sent when an answer signal is received.
-
-
- 3.7 Clear back from the fixed network is not immediately relayed to the ship earth
- station. However, clear-back supervision is done by the interworking procedure.
-
- Normal clearing takes place when a channel release signal is received from the ship
- earth station or a clear-back indication (BITE 25) is received from the interworking
- procedure. BITE 25 is generated when the timer defined in Recommendation Q.118, 4.3.2
- expires, (see the various interworking procedures defined below).
-
-
- 3.8 Additional procedures required for interworking with ISUP are for further study.
-
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-
-
- Fascicle VI.14 - Rec. Q.1112 26
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- FIGURE 1/Q.1112 (sheet 1 of 3)
-
- Logic procedures for incoming INMARSAT Standard B signalling
- (ship to shore calls)
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- 27 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 1/Q.1112 (sheet 2 of 3)
-
- Logic procedures for incoming INMARSAT Standard B signalling
- (ship to shore calls)
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- Fascicle VI.14 - Rec. Q.1112 28
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- FIGURE 1/Q.1112 (sheet 3 of 3)
-
- Logic procedures for incoming INMARSAT Standard B signalling
- (ship to shore calls)
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- 29 Fascicle VI.14 - Rec. Q.1112
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- 4 Outgoing INMARSAT procedures (shore-to-ship calls)
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- Figure 2/Q.1112 contains the procedures for the outgoing INMARSAT Standard-B
- Signalling System.
-
- This description only includes those aspects of the INMARSAT Standard-B system which
- have to be implemented for interworking purposes. Internal procedures, such as those
- required for setting up and clearing the satellite channel, are not shown. This also
- applies to preemption procedures for assigning channels to distress calls.
-
- The following details should be noted.
-
- 4.1 The satellite circuit is established when all digits of the SES number have been
- received. The MSSC will check if the SES is barred for incoming calls or busy. This may
- involve information exchange with the Network Coordination Station. Call barring is
- indicated to the fixed network by use of BITE 20: send special information tone. For ISDN
- interworking (Signalling System No. 7) the cause may be indicated more precisely.
-
- 4.2 Calling party's category indicators are converted to information elements in
- INMARSAT Standard B signalling system as shown in Table 20/Q.1112.
-
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-
- TABLE 20/Q.1112
-
- Conversion of calling party's category indicators to information
- elements in INMARSAT Standard-B Signalling System
- w
- ┌──────────────────────────────────────┬──────────────────────────────────────
- ┐
- │ Calling party's │ Information elements in │
- │ category indicator FITE │ INMARSAT │
- ├──────────────────────────────────────┼──────────────────────────────────────┤
- │ 9-13: Operator, language │ │
- │ indication │ │
- │ 14: Operator with forward │ │
- │ transfer facility │ │
- │ 15: Subscriber │ Priority: routine │
- │ 16: Subscriber or operator with │ Service: telephone │
- │ forward transfer facility │ │
- │ 17: Subscriber, ordinary call │ │
- │ 18: Subscriber, call with │ Priority: for further study │
- │ priority │ Service : telephone │
- │ 19: Data call │ Priority: routine │
- │ │ Service: telephone (3.1 kHz │
- │ │ audio) │
- └──────────────────────────────────────┴──────────────────────────────────────┘
- w
- wNotew - FITEs 9-16 are converted to FITE 17 by the interworking procedure.
-
-
-
- 4.3 The following events may occur during call set-up:
-
- - the SES is busy (BITE 16); this is indicated by the NCS during call set-up;
-
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-
- Fascicle VI.14 - Rec. Q.1112 30
-
-
- - there is no available satellite channel for the requested service; in this case
- network congestion indication (BITE 12) is provided back to the fixed network;
-
- - the continuity test may fail; in this case the subscriber line out of service
- indication (BITE 17) is used.
-
- If the called terminal on the ship is not available (even though the SES could make
- the connection) or does not support the requested service type, the SES will indicate
- this by a call result message. This is for further study.
-
- 4.4 When a clear forward signal is received from the fixed network, the MSSC will clear
- the satellite circuit with a channel release message.
-
- The ship earth station may clear the satellite circuit by sending a channel release
- message to the MSSC. When receiving such a message, the MSSC will initiate clearing of
- the satellite circuit and provide a clear-back signal to the fixed network.
-
- Precautions should be taken at the ship earth station in order to avoid
- unintentional clearing by the user. This could be done by allowing some time (e.g. five
- seconds) for a reanswer signal to appear before the channel release message is sent to
- the MSSC.
-
- The MSSC may also release the circuit if problems are detected on the radio path. In
- this case also a clear-back signal should be provided to the fixed network.
-
- 4.5 Additional procedures required for interworking with ISUP are for further study.
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- 31 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 2/Q.1112 (sheet 1 of 3)
-
- Logic procedures for outgoing INMARSAT Standard B signalling
- (shore to ship calls)
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- Fascicle VI.14 - Rec. Q.1112 32
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- FIGURE 2/Q.1112 (sheet 2 of 3)
-
- Logic procedures for outgoing INMARSAT Standard B signalling
- (shore to ship calls)
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- 33 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 2/Q.1112 (sheet 3 of 3)
-
- Logic procedures for outgoing INMARSAT Standard B signalling
- (shore to ship calls)
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- Fascicle VI.14 - Rec. Q.1112 34
-
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- 5 Interworking of incoming INMARSAT to outgoing INMARSAT
-
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- 5.1 Figure 3/Q.1112 contains the procedures for interworking between incoming and
- outgoing procedures of INMARSAT Standard-B signalling system.
-
- These procedures may also apply for interworking with the INMARSAT Standard-B and
- Standard-A systems.
-
- 5.2 The interworking procedure supervises the answer time (timer t1). The value of timer
- t1 is two to four minutes in compliance with Recommendation Q.118, 4.3.1.
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- 35 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 3/Q.1112 (sheet 1 of 2)
-
- Interworking of INMARSAT Standard B System with itself
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- Fascicle VI.14 - Rec. Q.1112 36
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- FIGURE 3/Q.1112 (sheet 2 of 2)
-
- Interworking of INMARSAT Standard B System with itself
-
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- 6 Interworking of Signalling System R2 to outgoing INMARSAT
-
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- 6.1 Figure 4/Q.1112 contains the procedures for interworking of Signalling System R2 to
- INMARSAT Standard-B signalling system.
-
- 6.2 The ringing tone towards the calling subscriber of the fixed network is intitiated
- by the interworking procedure. The tone should have characteristics in accordance with
- Recommendation Q.35.
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- 37 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 4/Q.1112 (sheet 1 of 2)
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- Interworking of Signalling System R2 to INMARSAT Standard B System
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- Fascicle VI.14 - Rec. Q.1112 38
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- FIGURE 4/Q.1112 (sheet 2 of 2)
-
- Interworking of Signalling System R2 to INMARSAT Standard B System
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- 39 Fascicle VI.14 - Rec. Q.1112
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- 7 Interworking of incoming INMARSAT to Signalling System R2
-
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- 7.1 Figure 5/Q.1112 contains the procedure for interworking of Signalling System R2 to
- INMARSAT Standard-B signalling system.
-
- 7.2 If the call is destined to a country whose ISC has direct connection to the MSSC
- (result of SPITE 22, transit connection following?), the country code not included
- indication (FITE 2) is provided to the outgoing Signalling System R2 procedure. This
- indication is followed by an echo- suppressor indicator (FITE 4 or FITE 5). FITE 4 is
- used when an incoming echo control device is not required for the call (e.g. data call);
- otherwise FITE 5 should be used.
-
- For calls requiring a transit ISC the country code indicator FITE 7 or FITE 8 should
- be used. FITE 7 is used when an incoming echo control device is not required at the
- remote end and FITE 8 when such a device is to be inserted.
-
- See also Recommendation Q.1111 for control of echo control devices.
-
- 7.3 The interworking procedure supervises the answer time and the clear-back time
- (timers t1 and t2, respectively).
-
- Timers t1 and t2 take values as follows:
-
- t1 = two to four minutes, Recommendation Q.118, 4.3.1
-
- t2 = one to two minutes, Recommendation Q.118, 4.3.2.
-
- When timer t1 expires, a forced release message is returned to the incoming INMARSAT
- procedure (BITE 29). When timer t2 expires, a clear-back message is sent to the incoming
- INMARSAT procedure (BITE 25).
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- Fascicle VI.14 - Rec. Q.1112 40
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- FIGURE 5/Q.1112 (sheet 1 of 3)
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- Interworking of INMARSAT Standard B System to Signalling System R2
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- 41 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 5/Q.1112 (sheet 2 of 3)
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- Interworking of INMARSAT Standard B System to Signalling System R2
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- Fascicle VI.14 - Rec. Q.1112 42
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- FIGURE 5/Q.1112 (sheet 3 of 3)
-
- Interworking of INMARSAT Standard B System to Signalling System R2
-
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- 8 Interworking of Signalling System No. 7 TUP to outgoing INMARSAT
-
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- 8.1 Figure 6/Q.1112 contains the procedures for interworking of Signalling System No. 7
- TUP to INMARSAT Standard-B signalling system.
-
-
- 8.2 Activation of the outgoing INMARSAT procedure takes place when a continuity
- indicator (FITE 24 or FITE 25) is received from Signalling System No. 7. Any digits
- received during this time are stored by the interworking procedure and then provided to
- the outgoing INMARSAT procedure when continuity has been indicated.
-
-
- 8.3 The ringing tone towards the calling subscriber of the fixed network is initiated by
- the interworking procedure. The tone should have characteristics in accordance with
- Recommendation Q.35.
-
- FIGURE 6/Q.1112 (sheet 1 of 2)
-
- Interworking of Signalling System No. 7 TUP of INMARSAT Standard B System
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- 43 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 6/Q.1112 (sheet 2 of 2)
-
- Interworking of Signalling System No. 7 TUP of INMARSAT Standard B System
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- Fascicle VI.14 - Rec. Q.1112 44
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- 9 Interworking of incoming INMARSAT to Signalling System No. 7 TUP
-
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- 9.1 Figure 7/Q.1112 contains the procedures for interworking of incoming INMARSAT
- Standard-B signalling system to Signalling System No. 7 TUP.
-
- 9.2 The interworking procedure provides the following information to the outgoing
- Signalling System No. 7 procedure in order to initialize the information elements of the
- initial address message.
-
- - continuity check required or not required (FITE 25 or FITE 26);
-
- - one satellite link included (FITE 21);
-
- - country code indicator: FITE 2 if the call is destined for a country whose ISC
- has direct connections to the MSSC and FITE 3 in all other cases;
-
- - echo control indicator: FITE 4 when an echo control device is not required and
- FITE 5 when such a device is required at the incoming end.
-
- 9.3 The interworking procedure supervises the answer time and the clear-back time
- (timers t1 and t2, respectively).
-
- Timers t1 and t2 take values as follows:
-
- t1 = two to four minutes, Recommendation Q.118, 4.3.1
-
- t2 = one to two minutes, Recommendation Q.118, 4.3.2.
-
- When timer t1 expires, a forced release message is returned to the incoming INMARSAT
- procedure (BITE 29). When timer t2 expires, a clear-back message is sent to the incoming
- INMARSAT procedure (BITE 25).
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- 45 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 7/Q.1112 (sheet 1 of 3)
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- Interworking of INMARSAT Standard B System to Signalling System No. 7 TUP
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- Fascicle VI.14 - Rec. Q.1112 46
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- FIGURE 7/Q.1112 (sheet 2 of 3)
-
- Interworking of INMARSAT Standard B System to Signalling System No. 7 TUP
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- 47 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 7/Q.1112 (sheet 3 of 3)
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- Interworking of INMARSAT Standard B System to Signalling System No. 7 TUP
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- Fascicle VI.14 - Rec. Q.1112 48
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- 10 Interworking of Signalling System No. 7 ISUP to outgoing INMARSAT
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- For further study.
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- 11 Interworking of incoming INMARSAT to Signalling System No. 7 ISUP
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- For further study.
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- 12 Interworking of Signalling System No. 5 to outgoing INMARSAT
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- Figure 8/Q.1112 contains the procedures for the interworking of Signalling System
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- 13 Interworking of incoming INMARSAT to Signalling System No. 5
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- Figure 9/Q.1112 contains the procedures for the interworking of INMARSAT Standard-B
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- 49 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 8/Q.1112 (sheet 1 of 2)
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- Interworking of Signalling System No. 5 to INMARSAT Standard B System
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- Fascicle VI.14 - Rec. Q.1112 50
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- FIGURE 8/Q.1112 (sheet 2 of 2)
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- 51 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 9/Q.1112 (sheet 1 of 3)
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- Fascicle VI.14 - Rec. Q.1112 52
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- FIGURE 9/Q.1112 (sheet 2 of 3)
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- 53 Fascicle VI.14 - Rec. Q.1112
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- FIGURE 9/Q.1112 (sheet 3 of 3)
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- Fascicle VI.14 - Rec. Q.1112 54
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