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- 4 Outgoing INMARSAT aeronautical logic procedures (Ground-to-air calls)
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- Figure 2/Q.1152 contains the procedures for the outgoing INMARSAT aeronautical signalling
- system.
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- This description only includes the aspects of the INMARSAT aeronautical system which have to be
- implemented for interworking purposes. Internal procedures, such as those required
- for setting up and clearing satellite channels are not shown. This also applies to pre-emption procedures for assigning channels to distress calls.
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- The following details should be noted:
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- 4.1 The outgoing INMARSAT procedure receives the calling party indicator, and address digits from
- the interworking process. It determines whether the addressed AES is an authorized
- user and if it is logged on in the same satellite region. BITE 15 is returned to the
- terrestrial network if the dialled AES number is invalid.
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- 4.2 The MSSC attempts to assign a satellite channel to the call, and tests for continuity of the
- channel. National network congestion (BITE 12) signal is returned if no channel is
- available. Appropriate signals are returned to signify continuity failure and AES busy
- conditions.
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- 4.3 Answer signal is returned when the connect message is received from the AES.
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- 4.4 The call is cleared down in the usual manner, on receipt of either clear forward from the
- interworking process, or channel release from the AES.
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- 1 Fascicle VI.14 - Rec. Q.1152
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- wNotew - Number valid ? means is the AES in the region of the calling GES; i.e. logged on the same
- satellite.
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- FIGURE 2/Q.1152 (sheet 1 of 2)
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- Logic procedures for outgoing INMARSAT aeronautical signalling
- (ground-to-air calls)
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- Fascicle VI.14 - Rec. Q.1152 2
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- FIGURE 2/Q.1152 (sheet 2 of 2)
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- Logic procedures for outgoing INMARSAT aeronautical signalling
- (ground-to-air calls)
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- 3 Fascicle VI.14 - Rec. Q.1152
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- 5 Interworking of INMARSAT aeronautical signalling system with itself
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- Figure 3/Q.1152 contains the procedures for interworking between the incoming and outgoing
- procedures of the INMARSAT aeronautical system. These procedures may also apply for
- interworking between INMARSAT aeronautical and the Standard-A and Standard-B systems.
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- The following details should be noted:
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- 5.1 The outgoing INMARSAT aeronautical logic process is activated after receipt of the calling
- party category information, indicating whether the call is ordinary or priority.
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- 5.2 The called party address, excluding the INMARSAT country code, is transferred to the outgoing
- process. The process returns to idle on receipt of any unsuccessful BITE or the clear
- forward FITE.
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- 5.3 The call is cleared as normal, on either clearforward FITE or clearback BITE signals.
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- 5.4 The interworking procedure supervises the answer time (timer t1). The value of the timer is as
- follows:
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- t1 = 2 to 4 minutes, as per Recommendation Q.118, 4.3.1.
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- Fascicle VI.14 - Rec. Q.1152 4
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- FIGURE 3/Q.1152 (sheet 1 of 2)
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- Interworking of INMARSAT aeronautical system with itself
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- 5 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 3/Q.1152 (sheet 2 of 2)
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- Interworking of INMARSAT aeronautical system with itself
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- Fascicle VI.14 - Rec. Q.1152 6
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- 6 Interworking of incoming INMARSAT aeronautical to Signalling System R2
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- 6.1 Figure 4/Q.1152 contains the procedures for interworking of INMARSAT aeronautical signalling
- system to Signalling System R2.
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- 6.2 The interworking procedure supervises the answer time and the clearback time, with timers t1
- and t2 respectively. The values of the timers are as follows:
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- t1 = 2 to 4 minutes, as per Recommendation Q.118, 4.3.1
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- t2 = 1 to 2 minutes, as per Recommendation Q.118, 4.3.2
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- 7 Interworking of Signalling System R2 to outgoing INMARSAT aeronautical
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- 7.1 Figure 5/Q.1152 contains the procedures for interworking of Signalling System R2 to INMARSAT
- aeronautical signalling system.
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- 7.2 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.
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- 8 Interworking of incoming INMARSAT aeronautical to Signalling System No. 7 (TUP)
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- Figure 6/Q.1152 contains the procedures for interworking of INMARSAT aeronautical signalling
- system to Signalling System No. 7 (TUP).
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- The following details should be noted:
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- 8.1 The outgoing Signalling System No. 7 (TUP) is activated only after receipt of calling party
- category information.
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- 8.2 Signals to inform whether continuity checking is required on the terrestrial link, whether an
- incoming half-echo suppressor should be inserted, and whether country code digits
- will be sent along with the called party address, are sent to the ISC. The ISC is also
- informed that continuity has been proven on the satellite link.
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- 8.3 All address-complete backward signals are transferred through to the outgoing aeronautical
- procedure. The charge related information is interpreted and used by the MSSC for
- billing purposes, and a simple address complete message is sent to the AES.
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- 8.4 All unsuccessful call indications received from the ISC are relayed to the INMARSAT system, by
- means of the call attempt result message with the cause value set appropriately.
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- 8.5 Charge information contained in the answer message is again used by the MSSC for billing
- purposes.
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- 8.6 Answer and clearback supervision is done by the MSSC with timers t1 and t2 respectively. The
- values of the timers are as follows:
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- t1 = 2 to 4 minutes (as per Recommendation Q.118, 4.3.1)
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- t2 = 1 to 2 minutes (as per Recommendation Q.118, 4.3.2)
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- 7 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 4/Q.1152 (sheet 1 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System R2
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- Fascicle VI.14 - Rec. Q.1152 8
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- FIGURE 4/Q.1152 (sheet 2 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System R2
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- 9 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 4/Q.1152 (sheet 3 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System R2
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- Fascicle VI.14 - Rec. Q.1152 10
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- FIGURE 5/Q.1152 (sheet 1 of 2)
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- Interworking of Signalling System R2 to INMARSAT aeronautical system
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- 11 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 5/Q.1152 (sheet 2 of 2)
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- Interworking of Signalling System R2 to INMARSAT aeronautical system
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- Fascicle VI.14 - Rec. Q.1152 12
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- FIGURE 6/Q.1152 (sheet 1 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 7 TUP
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- 13 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 6/Q.1152 (sheet 2 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 7 TUP
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- Fascicle VI.14 - Rec. Q.1152 14
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- FIGURE 6/Q.1152 (sheet 3 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 7 TUP
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- 15 Fascicle VI.14 - Rec. Q.1152
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- 9 Interworking of Signalling System No. 7 (TUP) to outgoing INMARSAT aeronautical
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- Figure 7/Q.1152 contains the procedures for interworking of Signalling System No. 7 (TUP) to
- INMARSAT aeronautical signalling system.
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- The following details should be noted:
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- 9.1 Calling party category information indicating the nature and priority of the call, is
- transferred through to the aeronautical system. The operator language indicator is
- interpreted and used by the MSSC.
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- 9.2 The entire called party address, except the country code digits, are transferred through to the
- aeronautical system. The outgoing aeronautical logic process determines the validity
- of the addressed AES, and returns an unsucessful call indication if necessary.
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- 9.3 The call may also be aborted if:
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- - no satellite voice channels are available;
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- - the addressed AES subscriber is busy;
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- - the continuity check is unsuccessful.
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- 9.4 The MSSC returns audible ring tone, as per provisions in Recommendation Q.35, to the
- terrestrial network. The tone is applied on receipt of the address complete message
- from the AES, and removed upon receipt of the connect message.
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- 10 Interworking of incoming INMARSAT aeronautical to Signalling System No. 5
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- Figure 8/Q.1152 contains the procedures for interworking of INMARSAT aeronautical signalling
- system to Signalling System No. 5.
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- 10.1 The outgoing Signalling System No. 5 procedure is activated after receipt of the calling party
- category information, in the access request message from the AES.
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- 10.2 Either KP2 or KP1 signal is sent by the MSSC, depending on whether the country code is to be
- outpulsed or not, respectively.
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- 10.3 The artificial "send-finished" signal, received from the outgoing Signalling System No. 5
- procedure is interpreted as an address complete condition to convey back to the AES.
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- 10.4 The "busy-flash" signal (unsuccessful call) received from the terrestrial network is
- transferred to the AES by means of the call attempt result message.
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- 10.5 Answer and clearback timeout supervision is done by the MSSC, with timers t1 and t2,
- respectively. The values of the timers are as follows:
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- t1 = 2 to 4 minutes (as per Recommendation Q.118, 4.3.1)
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- t2 = 1 to 2 minutes (as per Recommendation Q.118, 4.3.2)
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- Fascicle VI.14 - Rec. Q.1152 16
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- FIGURE 7/Q.1152 (sheet 1 of 2)
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- Interworking of Signalling System No. 7 TUP to INMARSAT aeronautical system
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- 17 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 7/Q.1152 (sheet 2 of 2)
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- Interworking of Signalling System No. 7 TUP to INMARSAT aeronautical system
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- Fascicle VI.14 - Rec. Q.1152 18
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- FIGURE 8/Q.1152 (sheet 1 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 5
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- 19 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 8/Q.1152 (sheet 2 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 5
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- Fascicle VI.14 - Rec. Q.1152 20
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- FIGURE 8/Q.1152 (sheet 3 of 3)
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- Interworking of INMARSAT aeronautical system to Signalling System No. 5
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- 21 Fascicle VI.14 - Rec. Q.1152
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- 11 Interworking of Signalling System No. 5 to outgoing INMARSAT aeronautical
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- Figure 9/Q.1152 contains the procedures for interworking of Signalling System No. 5 INMARSAT
- aeronautical signalling system.
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- The following details should be noted:
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- 11.1 The KP2 or KP1 signal is received from the MSSC, depending on whether the country code is to be
- expected along with the called party address or not, respectively.
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- 11.2 The "busy-flash" signal is sent to the ISC if the call cannot be completed for any of the
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- - called AES subscriber is busy;
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- - no satellite channel is available;
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- - the continuity check is unsuccessful.
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- The special information tone is sent back to the ISC, if the call is unsuccessful for any other
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- 11.3 Answer and clearback signals received from the AES are conveyed through to the terrestrial
- network as soon as they are received, and there is no timeout supervision required.
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- wAddendumw - A recent change in the INMARSAT signalling system definition allows cause
- information to be carried in the channel release signal, thereby making it
- unnecessary to send the call attempt result signal for unsuccessful calls. The interworking
- procedures in this Recommendation do not reflect this change.
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- Fascicle VI.14 - Rec. Q.1152 22
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- FIGURE 9/Q.1152 (sheet 1 of 2)
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- Interworking of Signalling System No. 5 to INMARSAT aeronautical system
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- 23 Fascicle VI.14 - Rec. Q.1152
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- FIGURE 9/Q.1152 (sheet 2 of 2)
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- Interworking of Signalling System No. 5 to INMARSAT aeronautical system
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- Fascicle VI.14 - Rec. Q.1152 24
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- 25 Fascicle VI.14 - Rec. Q.1152
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