US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Manual de usuario descargar pdf (Pagina 115)

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Command Reference

Fax Class 1 and Fax Class 1.0 Commands - 107

Fax Class 1 and Fax Class 1.0 Commands

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.

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.

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.

Fax Mode Selection

Fax Class 1 and Fax Class 1.0 commands are identified in Table 5-1. Fax Class

1.0 includes all Fax Class 1 commands.

Table 5-1: Fax Class 1 and Fax Class 1.0 Commands

Command/

Parameter

Function Applicable in

Fax Class 1

Applicable in

Fax Class 1.0

+FCLASS=<clas

Select, read or test service class X X

+FAE=<value> Auto answer enable X X

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 157 158

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US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Manual de usuario Pagina 115