Fax Class 1 And Fax Class 1.0 Commands; Fax I/O Processing; Dte-To-Modem Transmit Data Stream; Modem-To-Dte Receive Data Stream - Conexant H08-15355F Reference Manual

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
<DLE><data>
<DLE><ETX>
<DLE><DLE>

4.1.2 Modem-to-DTE Receive Data Stream

Characters Detected
<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.
Command/Parameter
FCLASS=<class>
+FAE=<value>
FTS= time
FRS= time
FTM= mod
FRM= mod
FTH= mod
FRH= mod
FAR= off/on
FCL=<time>
FDD= value
FIT= time , action
+FPR=<rate>
FMI
FMM
FMR
+FLO
+IFC
A
D string
H
X = Applicable; - = Not applicable
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Command Reference Manual
Delete <DLE><data> characters.
Recognize as a string terminator and take appropriate action.
Replace with single <DLE> character.
Insert extra <DLE> ahead of <DLE>.

Table 4-1. Fax Class 1 and Fax Class 1.0 Commands

Function
Select, read or test service class
Auto answer enable
Stop transmission and pause
Wait for silence
Transmit data with <mod> carrier
Receive data with <mod> carrier
Transmit HDLC data with <mod> carrier
Receive HDLC data with <mod> carrier
Adaptive reception control
Carrier loss timeout
Double escape character replacement control
DTE inactivity timeout
Fixed DTE Rate
Report manufacturer ID
Report model ID
Report revision ID
Flow Control
Local DTE-modem flow control (see Section 3.2.1.14)
Answer (see Section 3.2.3.4)
Dial (see Section 3.2.3.1)
Hangup (see Section3.2.3.5)
Conexant
Action Taken
Action Taken
Applicable in
Fax Class 1
Applicable in
Fax Class 1.0
X X
X X
X X
X X
X X
X X
X X
X X
- X
- X
- X
- X
- X
- X
- X
- X
- X
X X
X X
X X
X X
4-1