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Text File | 1991-12-13 | 33.4 KB | 1,756 lines |
- .rs
- .\" Troff code generated by TPS Convert from ITU Original Files
- .\" Not Copyright ( c) 1991
- .\"
- .\" Assumes tbl, eqn, MS macros, and lots of luck.
- .TA 1c 2c 3c 4c 5c 6c 7c 8c
- .ds CH
- .ds CF
- .EQ
- delim @@
- .EN
- .nr LL 40.5P
- .nr ll 40.5P
- .nr HM 3P
- .nr FM 6P
- .nr PO 4P
- .nr PD 9p
- .po 4P
-
- .rs
- \v | 5i'
- .ce 1000
- ANNEX\ A
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .ce 1000
- \fBProcedure for G3 document facsimile transmission in the general\fR
- .sp 1P
- .RT
- .ce 0
- .ce 1000
- \fBswitched telephone network incorporating error correction\fR
- .ce 0
- .LP
- A.1
- \fIIntroduction\fR
- .sp 1P
- .RT
- .PP
- A.1.1
- This Annex is intended to apply to document facsimile apparatus
- covered by Recommendation\ T.4, Annex\ A. It describes the procedures and
- signals to be used where facsimile equipment incorporates error correction
- capabilities. When existing equipment is operating in a non\(hyCCITT manner,
- they shall not interfere with equipment operating in accordance with the
- Series\ T
- Recommendation.
- .sp 9p
- .RT
- .PP
- A.1.2
- Use of this Annex is optional
- .sp 9p
- .RT
- .sp 1P
- .LP
- A.1.3
- \fIOutline of the\fR
- \fIerror correction method\fR
- .sp 9p
- .RT
- .PP
- The error correction method described in this Annex is based on
- the half\(hyduplex page selective repeat ARQ (automatic repeat request)
- technique.
- .PP
- An HDLC frame structure is utilized for all binary coded facsimile
- message procedures.
- .PP
- The transmitting terminal can decide to use either 256 or 64 octets
- for the frame size by using DCS command. The receiving terminal must be
- able to receive 256\ and 64\ octets of frame size.
- .PP
- The transmitting station divides the coded data specified in
- Recommendation\ T.4, \(sc\ 4 into a number of frames and transmits them
- with each
- frame number.
- .PP
- When the previous message has not been satisfactorily received, the
- receiving station transmits PPR response to indicate that the frames specified
- in the associated facsimile information field are required to be
- retransmitted.
- .PP
- When PPR is received, the transmitting station retransmits the
- requested frames specified in PPR information field.
- .PP
- When PPR is received four times for the same block, either the EOR
- command is transmitted for end of retransmission or CTC (continue to correct)
- command is sent for continuous retransmission.
- .PP
- In the case of continuous retransmission, the modem speed may fall
- back or continue at the same speed in accordance with the decision of the
- transmitting terminal.
- .RT
- .sp 2P
- .LP
- A.2
- \fIDefinitions\fR
- .sp 1P
- .RT
- .PP
- A.2.1
- The signals and definitions used in the error correction
- procedure are as defined in the main body of this Recommendation unless
- specified otherwise.
- .sp 9p
- .RT
- .PP
- A.2.2
- Frame formats of RCP frame and FCD frame for the in\(hymessage
- procedure are defined in Recommendation\ T.4, Annex\ A.
- .sp 9p
- .RT
- .sp 1P
- .LP
- A.2.3
- \fIRelations between a page, blocks, partial pages and frames\fR
- .sp 9p
- .RT
- .PP
- One page of coded data as specified in Recommendation T.4, \(sc\ 4 is divided
- into a number of blocks. The block contains a number of frames. A
- partial page is defined as one transmitted block or a number of retransmitted
- frames.
- .RT
- .sp 1P
- .LP
- A.2.4
- \fIBlock size\fR
- .sp 9p
- .RT
- .PP
- The block size is defined as the maximum number of frames that can be sent
- by the transmitter before receiving the response.
- .bp
- .RT
- .sp 2P
- .LP
- A.3
- \fIBlock size and frame size\fR
- .sp 1P
- .RT
- .PP
- A.3.1
- For T.4 error correction mode, a transmitting terminal
- indicates frame size by using DCS signal.
- .sp 9p
- .RT
- .PP
- A.3.2
- The following values of frame size are applicable: 256 or 64
- octets. These values of frame size do not include either FCF or frame
- number octet. Therefore, the total length of the HDLC information field
- including both the FCF and the frame number octet is as follows: 258\ or
- 66\ octets.
- .PP
- A.3.3
- The receiving terminal must have the following condition:
- .LP
- frame size: 256 or 64 octets.
- .LP
- block size: 256 frames.
- .PP
- A.3.4
- The transmitting terminal may send the block whose size is less
- than 256\ frames at the end of each page. This block is called a
- short
- block
- .
- .PP
- A.3.5
- The frame size should not be changed during a transmission of
- one page. In order to change the frame size, indication of mode change
- should be made using PPS | (mu | OM or EOR | (mu | OM command at the page
- boundary.
- .sp 2P
- .LP
- A.4
- \fIInformation field\fR | (see also \(sc\ 5.3.6)
- .sp 1P
- .RT
- .PP
- The HDLC information field is of variable length and contains
- the specific information for the control and message interchange between two
- facsimile stations. In this Recommendation it is divided into two parts, the
- facsimile control field (FCF) and the facsimile information field
- (FIF).
- .RT
- .LP
- 1)
- \fIFacsimile control field (FCF)\fR \ \(em\ The facsimile
- control field is defined to be the first 8 bits or
- 16\ bits of the HDLC information field. FCF of 16\ bits should be
- applied only for the optional\ T.4 error correction mode. This
- field contains the complete information regarding the type of
- information being exchanged and the position in the overall
- sequence. The bit assignments within the FCF are as follows:
- .LP
- Where X appears as the first bit of FCF, X will be defined
- as follows:
- .LP
- \(em
- X\ \ is set to 1 by the station which receives a valid
- DIS signal;
- .LP
- \(em
- X\ \ is set to 0 by the station which receives a valid
- and appropriate response to a DIS signal;
- .LP
- \(em
- X\ \ will remain unchanged until the station again enters the beginning
- of phase\ B.
- .LP
- 2)
- \fIFacsimile information field (FIF)\fR \ \(em\ In many cases
- the FCF will be followed by the transmission of
- additional 8\(hybit octets to further clarify the facsimile
- procedure. This information for the basic binary coded system
- would consist of the definition of the information in DIS, DCS,
- DTC, CSI, CIG, TSI, NSC, NSF, NSS, CTC, PPS and PPR signals.
- .sp 1P
- .LP
- A.4.1
- \fICommand to receive\fR | (see also \(sc\ 5.3.6.1.3)
- .sp 9p
- .RT
- .PP
- From the transmitter to the receiver.
- .PP
- Format:\ X100\ XXXX
- .RT
- .LP
- 1)
- \fIContinue to correct (CTC)\fR \ \(em\ This command
- indicates that the transmitting station shall continue to correct the previous
- message. (This is a response to the 4th PPR received, and indicates that
- the
- transmitting station shall immediately send the requested frames specified
- in PPR information field.)
- .LP
- When the transmitter receives PPR four times, the modem
- speed may fall back or continue the previous transmission speed using CTC
- command.
- .LP
- This command should have the FIF of 2 octets, which
- corresponds to the bits\ No.\ 1\(hy16 of DCS standard command (See Table\
- 2/T.30).
- The receiving terminal uses only the bits\ No.\ 11\(hy14 to determine the data
- signalling rate.
- .LP
- Format:\ X100\ 1000
- .sp 1P
- .LP
- A.4.2
- \fIPre\(hymessage response signals\fR | (see also \(sc 5.3.6.1.4)
- .sp 9p
- .RT
- .PP
- From the receiver to the transmitter.
- .PP
- Format:\ X010\ XXXX
- .RT
- .LP
- 1)
- \fIResponse for continue to correct (CTR)\fR \ \(em\ This
- signal is the digital response to CTC signal, so that the
- receiving terminal can accept the contents included in CTC
- signal.
- .LP
- Format:\ X010\ 0011
- .bp
- .sp 1P
- .LP
- A.4.3
- \fIPost message commands\fR | (see also \(sc\ 5.3.6.1.6)
- .sp 9p
- .RT
- .PP
- From the transmitter to the receiver.
- .PP
- Format:\ X111\ XXXX
- .RT
- .LP
- 1)
- \fIPartial page signal (PPS)\fR \ \(em\ This command
- indicates the end of a partial page or a complete
- page of facsimile information and also indicates to return to
- the beginning of phase\ B or\ C upon receipt of\ MCF.
- .LP
- Format:\ X111\ 1101
- .LP
- The frame construction of PPS command and transmission order of
- bits included in\ I1\(hyI3 are shown in Figure\ A\(hy1/T.30.
- .LP
- .rs
- .sp 39P
- .ad r
- \fBFigure A\(hy1/T.30, (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- 2)
- \fIEnd of retransmission (EOR)\fR \ \(em\ This command
- indicates that the transmitter decides to terminate
- the retransmission of error frames in the previous partial page
- and to transmit the next block upon receipt of ERR response.
- .LP
- Format:\ X111\ 0011
- .bp
- .LP
- The frame construction of EOR command is shown in
- Figure\ A\(hy2/T.30.
- .LP
- .rs
- .sp 19P
- .ad r
- \fBFigure A\(hy2/T.30, (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- 3)
- \fIReceive ready (RR)\fR \ \(em\ This command is used to ask
- for the status of the receiver.
- .LP
- Format:\ X111\ 0110
- .LP
- \fINote\ 1\fR \ \(em\ This command is defined for flow control.
- .LP
- \fINote\ 2\fR \ \(em\ For flow control method, make reference to \(sc\ A.5.
- .sp 1P
- .LP
- A.4.4
- \fIPost\(hymessage responses\fR | (see also \(sc\ 5.3.6.1.7)
- .sp 9p
- .RT
- .PP
- From the receiver to the transmitter.
- .PP
- Format:\ X011\ XXXX
- .RT
- .LP
- 1)
- \fIPartial page request (PPR)\fR \ \(em\ This signal
- indicates that the previous message has not been
- satisfactorily received and that the frames specified in the
- associated facsimile information field are required to be
- retransmitted.
- .LP
- Format:\ X011\ 1101
- .PP
- The facsimile information field of the PPR signal is a fixed
- length of 256\ bits, each bit corresponds to an FCD frame i.e., the first
- bit to the first frame\ etc. For FCD frames which are received correctly,
- the
- corresponding bit in the PPR information field will be set to\ \*Q0\*U;
- those that are received incorrectly or not received will have their bit
- set to\ \*Q1\*U.
- .PP
- If more than one PPR signal is transmitted, the bit corresponding to an
- FCD frame which has been received correctly must always be set to\ \*Q0\*U.
- .PP
- The frame construction of PPR response is shown in
- Figure\ A\(hy3/T.30.
- .PP
- The process of an error correction is shown in
- Figure\ A\(hy4/T.30.
- .PP
- \fINote\ 1\fR \ \(em\ The number of frames in a partial page is less than or
- equal to 256\ frames. Therefore, in some circumstances there may be extra
- bits that do not correspond to any frames. These bits are set to \*Q1\*U
- (see
- Figure\ A\(hy5/T.30).
- .PP
- \fINote\ 2\fR \ \(em\ The first bit in the FIF corresponds to the first frame
- (frame No.\ 0).
- .RT
- .LP
- 2)
- \fIReceive not ready (RNR)\fR \ \(em\ This signal is used to
- indicate that the receiver is not ready to receive more data.
- .LP
- Format:\ X011\ 0111
- .LP
- \fINote\ 1\fR \ \(em\ This signal is defined for flow control.
- .LP
- \fINote\ 2\fR \ \(em\ For flow control, make reference to \(sc\ A.5.
- .LP
- 3)
- \fIResponse for end of retransmission (ERR)\fR \ \(em\ This signal is
- the digital response to EOR signal.
- .LP
- Format:\ X011\ 1000
- .bp
- .LP
- .rs
- .sp 13P
- .ad r
- \fBFigure A\(hy3/T.30, (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 29P
- .ad r
- \fBFigure A\(hy4/T.30, (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 28P
- .ad r
- \fBFigure A\(hy5/T.30, (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .sp 2P
- .LP
- A.5
- \fIFlow control procedure\fR
- .sp 1P
- .RT
- .PP
- A.5.1
- Flow control in the transmitting station is made by continuous flag transmission
- between frames or before the first frame.
- .sp 9p
- .RT
- .PP
- A.5.2
- The maximum transmission time of flags should be less than the
- value of timer\ T1.
- .PP
- A.5.3
- In case of transmission on a noisy channel, a long flag
- sequence may be destroyed by noise. Therefore, it is recommended that the
- receiver implement a control procedure to discard invalid frames which are
- obtained from erroneous flag sequences.
- .PP
- A.5.4
- Flow control in the receiving station is made using RR/RNR
- signals as shown in Figure\ A\(hy6/T.30.
- .LP
- A.5.4.1\ \ Inactivity timer T5 is defined as follows:
- .LP
- T5 = 60 s \(+- 5 s.
- .PP
- \fINote\fR \ \(em\ As the use of the T5 timer reduces transmission
- efficiency, implementation which minimizes its effect is desirable.
- .LP
- A.5.4.2\ \ The timer T5 is started at the timing of the first RNR response
- recognition.
- .LP
- A.5.4.3\ \ If the timer T5 has expired, the transmitter sends a DCN command
- for call release.
- .LP
- A.5.4.4\ \ If RNR response is not received correctly, an RR command is
- retransmitted to the receiver. After three unsuccessful attempts, the
- transmitter sends a DCN command for call release.
- .LP
- A.5.4.5\ \ After receiving RNR response, the transmitter immediately
- sends an RR command until an MCF/PIP response or an ERR/PIN response is
- received correctly.
- .LP
- A.5.4.6\ \ An MCF or ERR response indicates that the busy condition is cleared
- and the receiver ready to receive the data which follows the
- interruption.
- .bp
- .LP
- .rs
- .sp 35P
- .ad r
- \fBFigure A\(hy6/T.30, (N), p.6\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .sp 2P
- .LP
- A.6
- \fIProcedure interrupt\fR
- .sp 1P
- .RT
- .PP
- A.6.1
- Procedure interrupt signals are not allowed at the partial page
- boundaries.
- .sp 9p
- .RT
- .PP
- A.6.2
- Procedure interrupt after detection or transmission of PIP
- and\ PIN signals is accomplished by using the procedure defined in the
- main body of this Recommendation. This procedure is outside the scope of
- the error
- correction mode specified in this Annex\ A.
- .sp 9p
- .RT
- .sp 2P
- .LP
- A.7
- \fIFlow Diagrams\fR
- .sp 1P
- .RT
- .PP
- The following flow diagrams shows the phase B, pre\(hymessage
- procedures, phase\ C, message procedure, phase\ D, post\(hymessage procedures
- and
- phase\ E, call release, for both the transmitting and receiving stations.
- .PP
- For the Notes and an explanation of terms to the flow diagrams, see
- \(sc\ A.7.1.
- .bp
- .RT
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy7/T.30 (feuillet 1 sur 2), (N), p.7\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy7/T.30 (feuillet 1 sur 2), (N), p.8\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy7/T.30 (feuillet 2 sur 2), (N), p.9\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy7/T.30 (feuillet 2 sur 2), (N), p.10\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy8/T.30, (N), p.11\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy9/T.30, (N), p.12\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy10/T.30, (N), p.13\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy11/T.30, (N), p.14\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy12/T.30, (N), p.15\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy13/T.30, (N), p.16\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy14/T.30, (N), p.17\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy15/T.30, (N), p.18\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy16/T.30, (N), p.19\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy17/T.30, (N), p.20\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy18/T.30, (N), p.21\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy19/T.30, (N), p.22\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy20/T.30, (N), p.23\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy21/T.30, (N), p.24\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy22/T.30, (MC), p.25\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy23/T.30, (MC), p.26\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy24/T.30, (N), p.27\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy25/T.30, (N), p.28\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .sp 2P
- .LP
- A.7.1
- \fIFlow diagram key\fR
- .sp 1P
- .RT
- .LP
- COMMAND\ REC
- The \*Qcommand received\*U subroutine searches for an error\(hyfree
- standard command. The decision diamonds in the flow diagram
- refer to the most recent standard command received (e.g.,\ EOM,
- MPS,\ etc.).
- COMPT\ REMOTE
- REC
- The FIF associated with the DIS has indicated a \*Qcompatible remote
- receiver\*U.
- DOC\ TO\ XMIT
- The station has \*Qat least one document to be transmitted\*U.
- .LP
- COMPT\ REMOTE
- XMTR
- The FIF associated with the DIS has indicated a \*Qcompatible
- remote transmitter\*U which has documents to send.
- RESPONSE\ REC
- The \*Qresponse received\*U subroutine which searches for an error\(hyfree
- standard response.
- LAST\ DOC
- The \*Qlast document\*U, for the given operating mode, has been
- transmitted.
- SET\ MODE
- The system controller will \*Qset the appropriate mode\*U of
- operation.
- .LP
- 3RD\ TRY
- The command has been repeated three times without an appropriate
- response.
- CAPABLE\ RE\(hyXMIT
- The transmitting station is \*Qcapable of retransmitting\*U a document
- which was not received with acceptable quality.
- MSG\ CARRIER
- REC
- The \*Qmessage channel carrier has been received\*U. This carrier is
- 1800\ Hz for the Group\ 3 modulation scheme, and 1700\ Hz for the
- Group\ 3 optional modulation scheme, 2100\ Hz for the Group\ 2 modulations,
- and 1300\(hy2100\ Hz for the Group\ 1 modulation scheme.
- .LP
- PHASE/TRAIN\ OK
- The phasing/training\(hyTCF signal has been analyzed and the results of
- \*Qphasing/training were OK\*U.
- CHANGE\ MODE
- The transmitting unit desires to exit from the transmitting mode of
- operation and reestablish the capabilities.
- NSP\ REQ
- A \*Qnon\(hyspecified procedure\*U has been \*Qrecognized\*U by a unit
- compatible with the station initiating that procedure.
- COPY\ QUALITY\ OK
- By some algorithm, the \*Qcopy quality was deemed OK\*U.
- .LP
- REPHASE/TRAIN
- By some algorithm, it is deemed desirable to transmit a new
- phasing/training signal.
- FLAG
- There has been the detection of a \*Qflag\*U.
- RECEIVE\ A\ FRAME
- The unit has \*Qreceived one complete HDLC frame\*U.
- FCS\ ERROR
- The HDLC frame received contained an \*QFCS error\*U.
- .LP
- OPTIONAL\ RESPNS
- The HDLC frame received contained one of the listed \*Qoptional
- responses\*U.
- OPTIONAL
- COMMAND
- The HDLC frame received contained one of the listed \*Qoptional
- commands\*U.
- CRP\ OPTION
- The facsimile unit has the \*QCRP option\*U and can, therefore,
- request an immediate retransmission of the most recent command.
- .LP
- LOCAL\ INT
- Either the \*Qlocal\*U machine or the \*Qlocal\*U operator wishes to generate
- an interrupt of the standard facsimile procedures. An operator
- would use this as a means to request the establishment of voice
- contact.
- LINE\ REQ
- This means that the local operator has \*Qrequested\*U that the telephone
- line be connected to the handset for voice contact with the remote
- end.
- PRI\(hyQ
- A general term referring to either PRI\(hyEOM, a PRI\(hyMPS, or a PRI\(hyEOP
- post\(hymessage command, i.e.,\ the fifth bit of the standard post\(hymessage
- command is set to\ 1.
- END\ OF\ PAGE?
- The transmitting station may have further data to transmit to complete
- the page.
- .LP
- 4TH\ PPR?
- PPR has been received 4 times.
- TRANSMIT\ ERROR
- FRAMES
- The frames defined in the information field associated with PPR are
- transmitted using the V.27 | fIter\fR /V.29 modulation system.
- CONTINUE\ TO
- CORRECT?
- The transmitting station by some algorithm decides to continue
- correcting the previous message.
- .bp
- .LP
- CONT\ WITH
- NEXT\ MSG?
- The transmitting station by some algorithm decides to continue
- and transmit the next message. The previous message was not satisfactorily
- transmitted.
- .LP
- PPS\(muPRI\(hyQ?
- The terminal has \*Qreceived either PPS\(muPRI\(hyEOM, PPS\(muPRI\(hyMPS, or
- PPS\(muPRI\(hyEOP post\(hymessage command\*U.
- PPS\(muQ?
- The terminal has \*Qreceived either PPS\(muEOM, PPS\(muMPS, PPS\(muEOP
- or PPS\(muNull post\(hymessage command.\*U
- EOR\(muPRI\(hyQ?
- The terminal has \*Qreceived either EOR\(muPRI\(hyEOM, EOR\(muPRI\(hyMPS, or
- EOR\(muPRI\(hyEOP post\(hymessage command.\*U
- EOR\(muQ?
- The terminal has \*Qreceived either EOR\(muEOM, EOR\(muMPS, EOR\(muEOP or
- EOR\(muNull post\(hymessage command\*U.
- .LP
- RECEIVE\ READY?
- The receiving station is ready to receive the next message.
- RR\ RESPONSE
- REC?
- The \*QRR response received\*U subroutine searches for an error\(hyfree
- response for the RR command.
- CTC\ RESPONSE
- REC?
- The \*QCTC response received\*U subroutine searches for an error\(hyfree
- response for the CTC command.
- .PP
- \fINote\ 1\fR \ \(em\ The non\(hyspecified procedure, NSP, refers to a
- procedure which takes 6\ seconds or less to complete. It may not necessarily
- be a
- definable signal sequence.
- .PP
- \fINote\ 2\fR \ \(em\ This signal pertains to Group 3 apparatus only.
- .PP
- \fINote\ 3\fR \ \(em\ The PRI\(hyEOM, PRI\(hyEOP, PRI\(hyMPS post\(hymessage
- commands are sent when a local interrupt request is pending.
- .PP
- \fINote\ 4\fR \ \(em\ At any time during the operation an interrupt may
- be generated which would result in a procedural interrupt. It is understood
- that if this
- interrupt happens during the transmission of the document, the EOM/RTC
- signal will be transmitted prior to invoking the procedural interrupt.
- .PP
- \fINote\ 5\fR \ \(em\ Where the symbol / is used, the term to the left of the
- symbol refers to Groups\ 1 and\ 2 equipment, and the term to the right of the
- symbol refers to Group\ 3 equipment.
- .PP
- \fINote\ 6\fR \ \(em\ Where the symbols { } are used, the signals within these
- symbols are a response to DIS from the calling unit wishing to receive.
- .PP
- \fINote\ 7\fR \ \(em\ Where the symbols (\ ) are used, the signals within these
- symbols are optional.
- .RT
- .sp 1P
- .LP
- A.8
- \fISignal sequence examples in case of\fR \fIerror correction procedure\fR
- .sp 9p
- .RT
- .PP
- The examples below are based on the flow diagrams and for
- illustrative and instructional purposes only. They should not be interpreted
- as establishing or limiting the protocol. The exchange of the various commands
- and responses is limited only by the rules specified in this Recommendation.
- .PP
- In these diagrams the dashed lines indicate transmission at the
- message data rate (Recommendation\ V.27 | fIter\fR , V.29), and (X, Y)
- means (page
- modulo number, block modulo number).
- .RT
- .LP
- .rs
- .sp 8P
- .ad r
- Blanc
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 1 sur 13), (N), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 2 sur 13), (N), p.30\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 3 sur 13), (N), p.31\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 4 sur 13), (N), p.32\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 5 sur 13), (N), p.33\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 6 sur 13), (N), p.34\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 7 sur 13), (N), p.35\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 8 sur 13), (N), p.36\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 25P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 9 sur 13), (N), p.37\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 24P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 10 sur 13), (N), p.38\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 11 sur 13), (N), p.39\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 12 sur 13), (N), p.40\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure A\(hy26/T.30 (feuillet 13 sur 13), (N), p.41\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .ce 1000
- APPENDIX\ I
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .ce 1000
- \fBExample of non\(hystandard manual\(hyto\(hymanual basic\fR \fBfacsimile
- operation\fR
- .sp 1P
- .RT
- .ce 0
- .PP
- It is acknowledged that there are existing equipments in the
- field that may not conform in all aspects to this Recommendation. Therefore,
- the decision may be made to go to a mode of operation other than specified
- herein. Figure\ I\(hy1/T.30 describes, as an example, one of these conditions.
- Other methods may be possible as long as they do not interfere with the
- recommended operation.
- .sp 1P
- .RT
- .LP
- .rs
- .sp 41P
- .ad r
- \fBFIGURE I\(hy1/T.30, (M), p.42\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .ce 1000
- APPENDIX\ II
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .LP
- .sp 1
- .ce
- \fBH.T. [1T13.30]\fR
- .ce
- \fBIndex of abbreviations used in Recommendation T.30\fR
- .ps 9
- .vs 11
- .nr VS 11
- .nr PS 9
- .TS
- center box;
- cw(42p) | cw(72p) | cw(72p) | cw(42p) .
- Abbreviation Function Signal format Reference
- _
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CED Called station identification 2100 Hz 4.3.3.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CFR Confirmation to receive X010 0001 5.3.6.1.4, 1)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- 1850 or 1650 Hz for 3s 4.3.1.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CRP Command repeat X101 1000 5.3.6.1.8, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CIG {
- Calling subscriber identification
- } 1000 0010 5.3.6.1.2, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CNG Calling tone 1100 Hz for 500 ms 4.3.3.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CSI {
- Called subscriber identification
- } 0000 0010 5.3.6.1.1, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CTC Continue to correct X100 1000 A.4.1
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- CTR {
- Response to continue to correct
- } X010 0011 A.4.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- DCN Disconnect X101 1111 5.3.6.1.8, 1)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- DCS Digital command signal X100 0001 5.3.6.1.3, 1)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- DIS Digital identification signal 0000 0001 5.3.6.1.1, 1)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- DTC Digital transmit command 1000 0001 5.3.6.1.2, 1)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- EOM End of message X111 0001 1100 Hz 5.3.6.1.6, 1) 4.3.2.4
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- EOP End of procedure X111 0100 5.3.6.1.6, 3)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- EOR End of retransmission X111 0011 A.4.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- ERR {
- Response for end of retransmission
- } X011 1000 A.4.4
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- FCD Facsimile coded date 0110 0000 A.2.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- FCF Facsimile control field \(em 5.3.6.1
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- FIF Facsimile informtion field \(em 5.3.6.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- FTT Failure to train X010 0010 5.3.6.1.4, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- GC Group command 1300 Hz for 1.5\(hy10.0 s 4.3.2.1
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- 2100 Hz for 1.5\(hy10.0 s
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- GI Group identification 1650 or 1850 Hz 4.3.1.1
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- HDLC High level data link control \(em 5.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- LCS Line conditioning signals 1100 Hz 4.3.2.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- MCF Message confirmation X011 0001 1650 or 1850 Hz 4.3.1.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- MPS Multi\(hypage signal X111 0010 5.3.6.1.6, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- NSC {
- Non\(hystandard facilities command
- } 1000 0100 5.3.6.1.2, 3)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- NSF Non\(hystandard facilities 0000 0100 5.3.6.1.1, 3)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- NSS Non\(hystandard set\(hyup X100 0100 5.3.6.1.3, 3)
- _
- .TE
- .nr PS 9
- .RT
- .ad r
- \fBTABLEAU II\(hy1/T.30 [1T13.30], p.43\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 7P
- .ad r
- BLANC
- .ad b
- .RT
- .LP
- .bp
- .ce
- \fBH.T. [2T13.30]\fR
- .ce
- \fBIndex of abbreviations used in Recommendation T.30\fR
- .ce
- \fI(end)\fR
- .ps 9
- .vs 11
- .nr VS 11
- .nr PS 9
- .TS
- center box;
- cw(42p) | cw(72p) | cw(72p) | cw(42p) .
- Abbreviation Function Signal format Reference
- _
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PIN Procedural interrupt negative X011 0100 5.3.6.1.7, 5)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PIP Procedural interrupt positive X011 0101 5.3.6.1.7, 4)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PIS Procedure interrupt signal 462 Hz for 3 s 4.3.3.1
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PPS Partial page signal X111 1101 A.4.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PPR Partial page request X011 1101 A.4.4
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PRI\(hyEOM Procedure interrupt\(hyEOM X111 1001 5.3.6.1.6, 4)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PRI\(hyEOP Procedure interrupt\(hyEOP X111 1100 5.3.6.1.6, 6)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- PRI\(hyMPS Procedure interrupt\(hyMPS X111 1010 5.3.6.1.6, 5)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- RCP {
- Return to control for partial page
- } 0110 0001 A.2.2
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- RNR Receive not ready X011 0111 A.4.4
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- RR Receive ready X111 0110 A.4.3
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- RTN Retrain negative X011 0010 5.3.6.1.7, 3)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- RTP Retrain positive X011 0011 5.3.6.1.7, 2)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- TCF Training check Zeros for 1.5 s 5.3.6.1.3, 4)
- .T&
- cw(42p) | lw(72p) | cw(72p) | lw(42p) .
- TSI {
- Transmitting subscriber identification
- } X100 0010 5.3.6.1.3, 2)
- _
- .TE
- .nr PS 9
- .RT
- .ad r
- \fBTABLEAU II\(hy1/T.30 [2T13.30], p.44\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 26P
- .ad r
- BLANC
- .ad b
- .RT
- .LP
- .bp
- .ce 1000
- APPENDIX\ III
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .ce
- \fBH.T. [1T14.30]\fR
- .ce
- \fBList of commands and appropriate responses\fR
- .ps 9
- .vs 11
- .nr VS 11
- .nr PS 9
- .TS
- center box;
- cw(60p) | cw(108p) | cw(60p) .
- Commands Comments Appropriate responses
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (NSF) (CSI) DIS {
- Identifying capabilities:
- from a manual receiver or an auto answer
- unit.
- } {
- (NSC) (CIG) DTC
- (TSI) DCS
- (NSF) (CSI) DIS
- (CRP) (TSI) (NSS)
- }
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (NSC) (CIG) DTC {
- Mode setting command:
- from the calling unit.
- This is
- a poll operation.
- } {
- (TSI) DCS
- (NSF) (CSI) DIS
- (CRP) (TSI) (NSS)
- }
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (TSI) DCS (TSI) (NSS) {
- Mode setting command:
- from manual transmitter or automatic
- receiver.
- This command is always followed by phasing/training.
- } {
- CFR
- FTT
- (NSC) (CIG) DTC
- (NSF) (CSI) DIS
- (CRP)
- }
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- CTC {
- Mode setting command:
- from the transmitter to the receiver.
- } (CTR) (CRP)
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (EOR\(muNULL) {
- Indicate the next block transmission:
- from the transmitter
- to the receiver.
- } (ERR) (RNR) (CRP)
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- {
- (EOR\(muMPS) or
- (EOR\(muEOP) or
- (EOR\(muEOM) or
- (EOR\(muPRI\(muMPS) or
- (EOR\(muPRI\(hyEOP) or
- (EOR\(muPRI\(hyEOM)
- } {
- Indicate the next message transmission:
- from the transmitter to
- the receiver.
- } (ERR) (RNR) PIN (CRP)
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- {
- MPS or EOP or EOM or
- (PRI\(hyMPS) or
- (PRI\(hyEOP) or
- (PRI\(hyEOM)
- } Post message commands. MCF RTP RTN PIP PIN (CRP)
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (PPS\(muNULL) {
- Post\(hymessage command for a partial page:
- from the transmitter
- to the receiver.
- } (PPR) MCF (RNR) (CRP)
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- {
- (PPS\(muMPS) or
- (PPS\(muEOP) or
- (PPS\(muEOM) or
- (PPS\(muPRI\(hyMPS) or
- (PPS\(muPRI\(hyEOP) or
- (PPS\(muPRI\(hyEOM)
- } {
- Post\(hymessage commands for a complete page:
- from the
- transmitter to the receiver.
- } {
- (PPR)
- MCF
- (RNR)
- PIP
- PIN
- (CRP)
- }
- _
- .TE
- .nr PS 9
- .RT
- .ad r
- \fBTABLEAU III\(hy1/T.30 [1T14.30], p.45\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .ce
- \fBH.T. [2T14.30]\fR
- .ce
- \fBList of commands and appropriate responses\fR
- .ce
- \fI(end)\fR
- .ps 9
- .vs 11
- .nr VS 11
- .nr PS 9
- .TS
- center box;
- cw(60p) | cw(108p) | cw(60p) .
- Commands Comments Appropriate responses
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- (RR) {
- Ask for the status of the receiver:
- from the transmitter to
- the receiver.
- } {
- (RNR)
- (ERR)
- MCF
- PIP
- PIN
- (CRP)
- }
- _
- .T&
- lw(60p) | lw(108p) | lw(60p) .
- DCN Phase E command None
- .TE
- .LP
- \fINote\fR
- \ \(em\ Where the symbols ( | are used, the signals within these
- symbols are optional.
- .nr PS 9
- .RT
- .ad r
- \fBTABLEAU III\(hy1/T.30 [2T14.30], p.46\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .ce 1000
- APPENDIX\ IV
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .ce 1000
- \fBInterworking between the standard mode\fR
- .sp 1P
- .RT
- .ce 0
- .ce 1000
- \fBand the recognized optional mode for the binary coded\fR
- .ce 0
- .ce 1000
- \fBhandshaking procedure\fR
- .ce 0
- .PP
- An example of a station having the standard binary coded,
- recognized optional binary coded and tonal capabilities is given in
- Figure\ IV\(hy1/T.30.
- .sp 1P
- .RT
- .LP
- .rs
- .sp 43P
- .ad r
- \fBFigure IV\(hy1/T.30, (MC), p.47\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .ce 1000
- APPENDIX\ V
- .ce 0
- .ce 1000
- (to Recommendation T.30)
- .sp 9p
- .RT
- .ce 0
- .ce 1000
- \fBSignal sequence examples\fR
- .sp 1P
- .RT
- .ce 0
- .PP
- The examples below are based on the flow diagrams and are for illustrative
- and instructional purpose only. They should not be interpreted as establishing
- or limiting the protocol. The exchange of the various commands and responses
- is limited only by the rules specified in this Recommendation.
- (See \(sc\(sc\ 5.3 and\ 5.4).
- .sp 1P
- .RT
- .PP
- The notations used in these diagrams are as follows:
- .LP
- \(em
- an arrowhead signifies the receiver of the signal;
- .LP
- \(em
- a solid line indicates transmission of the signal at the data rate of
- 300\ bit/s;
- .LP
- \(em
- the dashed lines indicate transmission at the message data
- rate (Recommendations\ V.27 | fIter\fR , V.29);
- .LP
- \(em
- a lightning bolt (\ \ ) indicates an invalid frame;
- .LP
- \(em
- a bold solid line indicates the transmission of tonal
- signals.
- .PP
- In the following figures, the examples given assume that DIS will be repeated
- for T1\ seconds unless responded by a valid signal.
- .LP
- .rs
- .sp 33P
- .ad r
- \fBFigure V\(hy1/T.30, (MC), p.\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 47P
- .ad r
- \fBFigure V\(hy2/T.30, (MC), p.49\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 34P
- .ad r
- \fBFigure V\(hy3/T.30, (MC), p.50\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 33P
- .ad r
- \fBFigure V\(hy4/T.30, (MC), p.51\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 23P
- .ad r
- \fBFigure V\(hy5/T.30, (MC), p.52\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 24P
- .ad r
- \fBFigure V\(hy6/T.30, (MC), p.53\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 29P
- .ad r
- \fBFigure V\(hy7/T.30, (MC), p.54\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 18P
- .ad r
- \fBFigure V\(hy8/T.30, (MC), p.55\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
- .LP
- .rs
- .sp 11P
- .ad r
- \fBFigure V\(hy9/T.30, (MC), p.56\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 11P
- .ad r
- \fBFigure V\(hy10/T.30, (MC), p.57\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 10P
- .ad r
- \fBFigure V\(hy11/T.30, (MC), p.58\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .rs
- .sp 10P
- .ad r
- \fBFigure V\(hy12/T.30, (MC), p.59\fR
- .sp 1P
- .RT
- .ad b
- .RT
- .LP
- .bp
-