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Command Reference Manual
1199 4-1
4. FAX CLASS 1 AND FAX CLASS 1.0 COMMANDS
4.1 FAX I/O PROCESSING
The fax I/O interface supports asynchronous serial and parallel interfaces. The character format is 8 bits data, no parity, and
1 stop bit. Start and stop elements are removed from the transmit data and added to the receive data. Both transmit and
receive data are buffered. Flow control using XON/XOFF or RTS/CTS is provided.
Unique control character strings are identified, filtered, or reinserted into the I/O data stream. These control characters and
their resultant action are described below.
4.1.1 DTE-to-Modem Transmit Data Stream
Characters Detected Action Taken
<DLE><data> Delete <DLE><data> characters.
<DLE><ETX> Recognize as a string terminator and take appropriate action.
<DLE><DLE> Replace with single <DLE> character.
4.1.2 Modem-to-DTE Receive Data Stream
Characters Detected Action Taken
<DLE> Insert extra <DLE> ahead of <DLE>.
The modem also identifies the end of a frame by inserting <DLE><ETX> into the data stream after the FCS bytes.
4.1.3 Fax Mode Selection
Fax Class 1 and Fax Class 1.0 commands are identified in Table 4-1. Fax Class 1.0 includes all Fax Class 1 commands.
Table 4-1. Fax Class 1 and Fax Class 1.0 Commands
Command/Parameter Function Applicable in
Fax Class 1
Applicable in
Fax Class 1.0
+FCLASS=<class> Select, read or test service class X X
+FAA=<value> Auto answer enable - X
+FAE=<value> Auto answer enable X X
+FTS=<time> Stop transmission and pause X X
+FRS=<time> Wait for silence X X
+FTM=<mod> Transmit data with <mod> carrier X X
+FRM=<mod> Receive data with <mod> carrier X X
+FTH=<mod> Transmit HDLC data with <mod> carrier X X
+FRH=<mod> Receive HDLC data with <mod> carrier X X
+FAR=<off/on> Adaptive reception control - X
+FCL=<time> Carrier loss timeout - X
+FDD=<value> Double escape character replacement control - X
+FIT=<time>, <action> DTE inactivity timeout - X
+FPR=<rate> Fixed DTE Rate - X
+FMI? Report manufacturer ID - X
+FMM? Report model ID - X
+FMR? Report revision ID - X
+FLO Flow Control - X
&K Local DTE-modem flow control (see Section 3.2.2.8) X X
A Answer (see Section 3.2.3.4) X X
D
<
string
>
Dial (see Section 3.2.3.1) X X
H Hangup (see Section 3.2.3.5) X X
X = Applicable; - = Not applicable.