APPENDIX C. ISDN G4 OPTION TYPE 90

Automatic Fallback from Group 4 Mode to Group 3 Mode

If your machine cannot communicate with the other party using Group 4 mode, it will try using Group 3 mode. This will allow your machine to send the message even if you selected Group 4 mode instead of Group 3 mode by mistake.

Terminal ID

Instead of the TTI, a Group 4 communication will transmit a variety of information, including an identifier known as the Terminal ID, which identifies the other party in the same way as a TTI.

The contents of the Terminal ID are programmed by a service technician.

The make-up of the Group 3 TTI and the Group 4 Terminal ID is as shown below.

Group 3

Date

TTI

Page No.

Label Insertion

Group 4

Rx Terminal ID

Tx Terminal ID

Date

Page No.

Label Insertion

Date, TTI, Page No., and Label Insertion are transmitted in the data signal, superimposed on the image.

Receiver (Rx) Terminal ID, Transmitter (Tx) Terminal ID, Date (Group 4), Page No. (Group 4), are transmitted in the Group 4 handshake signals.

The Receiver and Transmitter Terminal IDs have up to 24 characters. The Date (Group 4) is in the YY-MM-DD-HH:MM format. The Page No. (Group 4) has up to 7 characters.

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Ricoh FAX5600L manual 240, Automatic Fallback from Group 4 Mode to Group 3 Mode, Terminal ID