Examples

Chapter 2 – Fax Class 1 and 1.0 Commands

Examples of calling (transmitting) and answering (receiving) one page using Fax Class 1 commands are shown in Table 3-4 and Table 3-5, respectively. The examples show the interchange between the DTE and the modem for various cases. Comments are included to explain how to handle various situations. Commands and responses are in upper case and comments are in lower case. All streams of data denoted by <..frame> are terminated by the <DLE><ETX> characters.

Table 3-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)

DTE Commands		Modem Responses	Local Modem Action		Remote Station Action	Notes
AT+FCLASS=1		OK	Set Class 1
ATDT<string>			Dial and send CNG		Answer
			Look for V.21		send CED, V.21	AT+FRH=3
		CONNECT	Detect flags		Send HDLC flags	implied by dialing with
		CONNECT				+FCLASS=1.0
		<NSF frame>				+FCLASS=1.0
		<NSF frame>			Send NSF frame
		<DLE><ETX>			Send NSF frame
		<DLE><ETX>
		OK
AT+FRH=3		CONNECT	Detect flags
		CONNECT	Detect flags
		<CFI frame data>	get CSI		send CSI frame
		<DLE><ETX>	get FCS
		OK	accept FCS		check FCS	Frame status OK
AT+FRH=3		CONNECT	Detect flags			DTE must detect final
		CONNECT	Detect flags			DTE must detect final
		<DIS frame data>	get DIS		send DIS frame	frame bit to anticipate
		<DLE><ETX>	get FCS			loss of carrier
		OK	accept FCS		check FCS
AT+FRH=3	NO CARRIER		detect loss-of-carrier	drop carrier
AT+FRH=3		CONNECT	send V.21 carrier		detect carrier	Final frame bit clear tells
		CONNECT	send flags		detect flags	the modem to expect
			send TSI frame		get TSI frame	another frame.
<TSI frame data>		CONNECT	send FCS			Final frame bit set tells
<DLE><ETX>		CONNECT	send flags			the modem not to
			send DCS frame		get DCS frame	expect another frame
<DCS frame data>		OK	send FCS, flags
<DLE><ETX>		OK	drop carrier
AT+FTS=8;		CONNECT	wait 80 ms		detect carrier
+FTM=96		CONNECT	send V.29 carrier		detect carrier
<TCF data pattern>		OK	send TCF data		get TCF data
<DLE><ETX>		OK	drop carrier
AT+FRH=3		CONNECT	detect carrier		send V.21 carrier
		CONNECT	detect flags		send flags
		<CFR frame data>	get CFR frame		get CRF frame	Final frame bit set.
		<DLE><ETX>	check FCS		send FCS	frame OK
		OK	accept FCS
AT+FRH=3	NO CARRIER		detect loss-of-carrier	drop carrier
AT+FTM=96		CONNECT	send V.29 carrier		detect carrier
<page image data>			send page data		receive page
<DLE><ETX>			drop carrier
		OK
AT+FTS=8;			wait 80 ms		detect carrier
+FRH=3			send V.21 carrier		detect carrier
			send flags		detect flags
		CONNECT	send EOP frame		receives EOP
<EOP frame data>		OK	send FCS			final frame
<DLE><ETX>		OK	drop carrier			final frame
AT+FRH=3		CONNECT	detect carrier		send V.21 carrier
		CONNECT	detect flags		send flags
		<MCF frame data>	get MCF frame		get MCF frame	Final frame bit set.
		<DLE><ETX>	check FCS		send FCS	frame OK
		OK	accept FCS

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

MT5634SMI V.34, MT5634SMI V.92 specifications

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Multi-Tech Systems MT5634SMI V.34 Examples, Fax Class 1 Calling Sequence Transmitting a Single

Models: MT5634SMI V.34 MT5634SMI V.92

Examples

Table 3-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)

Local Modem Action

Remote Station Action

AT+FRH=3

CONNECT

AT+FTS=8;

CONNECT

MT5634SMI V.34, MT5634SMI V.92 specifications