Toshiba GD-1260 Flag, Maintains the synchroniza 7E H Tion, Receives an NSF sent from, Transmitter

-Control channel

The conventional T.30 procedure is performed. The transmission rate is 1200 bps.

Transmitter

Signal name	Abbreviation	Function	Remarks
Flag	flags	Maintains the synchroniza-	7E (H)
		tion.
Non-standard facilities	NSS	Receives an NSF sent from
setting		the receiver. It selects the
		available mode from the
		received NSF, and specifies
		the mode for the reception.
Transmitting Subscriber	TSI	Informs the telephone number
ID		of the transmitter.
Digital Command Signal	DCS	Specifies the mode that can
		be used for the communica-
		tion.
-	1	Declares to switch to the high-	“1” is sent continuously.
		speed procedure.

Receiver

Signal name	Abbreviation	Function	Remarks
Non-Standard Facilities	NSF	Informs the presence of the
		facilities other than those rec-
		ommended by ITU-T, abbrevi-
		ated user names, and
		manufacturer codes, etc.
Called Subscriber ID	CSI	Informs the telephone number
		of the receiver.
Digital Identification Signal	DIS	Informs the standard facilities
		recommended by ITU-T.
Flag	flags	Maintains the synchroniza-	7E (H)
		tion.
Confirmation for Recep-	CFR	Informs that the training of the
tion		modem is completed, and the
		receiver is ready to receive
		the image signal.

Reference: In the control channel, the frequency of the signals to be sent is different between the transmission and reception. The signal echoed back has never been misidentified as a signal sent from the other side. Therefore, this channel is not influenced by signals echoed back.

GD-1210/1250/1270/1160/1260	© 2006 - 2011 TOSHIBA TEC CORPORATION All rights reserved
DIALING/COMMUNICATION CONTROL

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