Multi-Tech Systems MT5634SMI V.34, MT5634SMI V.92 manual AT Command Implementation, +FCLASS=2.1

Chapter 3 – Fax Class 2 Commands

AT Command Implementation

The best way to get an understanding of how Class 2.1 commands or responses are used is to present an example of the transmission and reception of a one-page fax using Class 2.1.

Below are the commands and responses given to and returned from the transmitting and receiving modems. Commands are shown in upper case, responses in lower case.

Transmitting Modem			Receiving Modem
Line #	Command/response	Comments	Line #	Command/response	Comments
T1	AT+FCLASS=2.1	Set class to originate as a fax	R1	AT+FCLASS=2.1	Set class to
		modem			answer as a fax
					modem. Tell the
					modem the host
					can receive
					documents and
					to auto-detect the
					calling modem.
					Required setting:
					+FCLASS=2.1
T2	ok		R2	ok
	AT+FNR = 1,1,1,1	Enable all fax responses.		AT+FNR = 1,1,1,1	Enable all fax
					responses.
T3	AT+FLI=”666 6676"	Set local fax ID	R3	AT+FLI=”555 1212"	Set local fax ID
T4	ok		R4	ok
T5	ATDT5551212	Dial the receiving fax modem	R5	ring
T6	+FCO	Fax connection received
T7	+fci:”555 1212"	Remote fax’s identification string
T8	+fis:0,5,0,2,0,0,0,0	Remote fax’s capabilities
T9	ok
T10	AT+FDT	Begin negotiation and page
		transmission
			R7	+FCO	Fax connection
					received
			R8	+fti:”666 6676"	Remote fax’s
					identification
					string
			R9	+fcs:0,5,0,2,0,0,0,0	Negotiated fax
					parameters
					(speed may
					change)
			R10	ok
			R11	AT+FDR	Begin page
					reception
T11	+fcs:0,5,0,2,0,0,0,0	Negotiated fax parameters	R13	+fcs:0,5,0,2,0,0,0,0	Final negotiated
					fax parameters
T12	connect	Ready for page data	R14	connect	Ready to receive
					page data
T13			R15	<DC2>

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 49