DP120F/DP125F Dialing and Communication Procedure
9-12
March 2000 © TOSHIBA TEC
2.2.4 Training
The training signal involves a pre-determined picture signal which is used to check the capabil-
ity 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 K bps, 12 K bps>
<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 communication to follow. When the Rx station detects an error in the TCF
signal, the Rx station sends an FTT signal to theTx 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.
Segment 1
Segment 2, Segment 3
Segment 4
20 msec.
50 msec. + 160 msec.
20 msec.
253 msec.
V29
No-signal
Repeating two state signals
(Binary)
Scrambled
Data "1"
(Hexa or Octal)
TCF
Segment 1
4800 bps: 923 msec.
2400 bps: 1158 msec.
V27ter
TCF
Non-
modulated
Carrier
Continuous 180°
Phase Inversion
(Binary)
0° to 180° two-
phase pattern
(Binary)
Scrambled
Data "1"
(Hexa or Octal)
No-signal
Segment 2
Segment 3
Segment 4
Segment 5
Содержание DP120F
Страница 1: ...PLAINPAPERFACSIMILE File No 31200001 R0112216901 TTEC ...
Страница 294: ...March 2000 TOSHIBA TEC 6 7 DP120F DP125F PBA Outline and Sensor Function 3 7 PC I F PBA Fig 6 3 8 06 03 08 ...
Страница 311: ...DP120F DP125F Circuit Description 7 2 March 2000 TOSHIBA TEC 07 01 02 Fig 7 1 2 US CA TW models 2 3 ...
Страница 312: ...March 2000 TOSHIBA TEC 7 3 DP120F DP125F Circuit Description Fig 7 1 3 07 01 03 US CA TW models 3 3 ...
Страница 313: ...DP120F DP125F Circuit Description 7 4 March 2000 TOSHIBA TEC Fig 7 1 4 07 01 01E EU AU ASIA HK models 1 3 ...
Страница 314: ...March 2000 TOSHIBA TEC 7 5 DP120F DP125F Circuit Description Fig 7 1 5 07 01 02E EU AU ASIA HK models 2 3 ...
Страница 315: ...DP120F DP125F Circuit Description 7 6 March 2000 TOSHIBA TEC Fig 7 1 6 07 01 03E EU AU ASIA HK models 3 3 ...
Страница 316: ...March 2000 TOSHIBA TEC 7 7 DP120F DP125F Circuit Description 1 2 Block Diagram 07 01 10 Fig 7 1 7 ...
Страница 337: ...DP120F DP125F Circuit Description 7 28 March 2000 TOSHIBA TEC 3 1 Memory Circuit Fig 7 3 1 07 03 01 ...
Страница 387: ...DP120F DP125F Circuit Description 7 78 March 2000 TOSHIBA TEC EU AU ASIA HK models Fig 7 4 2 07 04 00E ...
Страница 401: ...DP120F DP125F Circuit Description 7 92 March 2000 TOSHIBA TEC 07 05 00 Fig 7 5 1 ...
Страница 579: ...March 2000 TOSHIBA TEC 9 15 DP120F DP125F Dialing and Communication Procedure b Standard procedure ...
Страница 654: ...DP120F DP125F Troubleshooting 11 42 March 2000 TOSHIBA TEC 2 3 Flow Chart Recommended for Field Service ...
Страница 655: ...March 2000 TOSHIBA TEC 11 43 DP120F DP125F Troubleshooting 2 4 Flow Chart Recommended for Telephone Screening ...
Страница 656: ...DP120F DP125F Troubleshooting 11 44 March 2000 TOSHIBA TEC ...
Страница 699: ...March 2000 TOSHIBA TEC 12 1 DP120F DP125F Appendix Chapter 12 Appendix 1 Sample List 1 1 Protocol Trace List ...
Страница 700: ...DP120F DP125F Appendix 12 2 March 2000 TOSHIBA TEC 1 2 Error Count List ...
Страница 701: ...March 2000 TOSHIBA TEC 12 3 DP120F DP125F Appendix 1 3 Function List for Maintenance ...
Страница 702: ...DP120F DP125F Appendix 12 4 March 2000 TOSHIBA TEC 1 4 Drum Unit ...
Страница 703: ...March 2000 TOSHIBA TEC 12 5 DP120F DP125F Appendix 1 5 Memory Dump List ...
Страница 706: ...SHUWA SHIBA PARK BLDG A 2 4 1 SHIBA KOEN MINATO KU TOKYO 105 8524 JAPAN ...