9
January 2005 © TOSHIBA TEC
e-STUDIO170F Dialing and Communication Procedure
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[ 4 ] Training
The training signal involves a pre-determined picture signal which is used to check the capability of the
phone line to reliably support facsimile traffic.
• Training signal
The training signal is transmitted following DCS with the modem speed to be selected by DCS. At
the receiving station, the automatic equalizer is adjusted by the training signal.
• Format of the training signal
<14.4 Kbps, 12 Kbps>
<9600 bps, 7200 bps>
<4800 bps, 2400 bps>
• TCF signal
When training is not performed correctly, an error may occur in the picture signal. The TX station
transmits a TCF signal and checks if any error occurs in picture data before the picture data commu-
nication to follow. When the RX station detects an error in the TCF signal, the RX station sends an
FTT signal to the TX station and request for re-training. When normal, a CFR signal is sent instead.
The modem speed of TCF signal is the same as the training signal, and it transmits all zeros for 1.5
seconds.
Segment 1
Segment 2
Segment 3
Segment 4
Alterations
of ABAB
Equalizer
Condition
Pattern
Rate
Pattern
Scrambled Binary
Data "1"
TCF
106 msec.
1240 msec.
27 msec.
20 msec.
1393 msec.
53 msec. + 160 msec.
V29
Repeating two state signals
(Binary)
Segment 1
Segment 2, Segment 3
Segment 4
No-signal
Scrambled
Data "1"
(Hexa or Octal)
TCF
20 msec.
20 msec.
253 msec.
4800 bps: 923 msec.
2400 bps: 1158 msec.
No-signal
V27ter
Continuous 180°
Phase Inversion
(Binary)
Segment 1
Segment 2
Segment 3
Segment 4
Segment 5
Non-
modulated
Carrier
Scrambled
Data "1"
(Hexa or Octal)
0° to 180° two-
phase pattern
(Binary)
TCF
Содержание ESTUDIO170F
Страница 1: ...SERVICE MANUAL PLAIN PAPER FACSIMILE e STUDIO170F File No SME04002900 R04102171300 TTEC Ver01_2005 05 ...
Страница 2: ... 2005 TOSHIBA TEC CORPORATION All rights reserved ...
Страница 192: ...e STUDIO170F Function Settings January 2005 TOSHIBA TEC 4 132 ...
Страница 214: ...e STUDIO170F Mechanical Description January 2005 TOSHIBA TEC 5 22 ...
Страница 308: ...e STUDIO170F Circuit Description January 2005 TOSHIBA TEC 7 78 ...
Страница 372: ...e STUDIO170F Removal Replacement Adjustment January 2005 TOSHIBA TEC 8 64 ...
Страница 490: ...e STUDIO170F Appendix January 2005 TOSHIBA TEC 12 8 ...
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