Siemens AC75 12. FAX Commands

AC75 AT Command Set

12. FAX Commands s

AC75_ATC_V01.002 Page 352 of 569 10/30/06

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12. FAX Commands

This chapter describes the AT commands used for fax communications. Please note that fax related commands

are not supported by Java.

If the ME is acting as a fax modem for a PC based fax application (e.g. "WinFax") it is necessary to select the

proper Service Class (Fax Class) provided by the ME. The ME reports its Service Class capabilities, i.e. the cur-

rent setting and the range of services available. This is provided by the AT+FCLASS command.

Service Classes supported by the ME:

During an active fax connection the AT parser functionality on the used channel is limited to the AT commands

which according to the ITU V.250 and T.31 specifications are mandatory for fax communications. The functions

of these AT commands are usually supported by commonly used fax applications.

This section describes the parameter <mod> used by some of the fax-specific AT commands. To find out the

value(s) actually supported by the <mod> parameter use the test commands either in on-hook or off-hook mode.

Parameter Description

Modulation scheme

3 V21 Ch2 - 300 bps

24 V.27ter - 2400 bps

48 V.27ter - 7200 bps

72 V.29 - 7200 bps

96 V.29 - 9600 bps

Note

•For AT+FRH and AT+FTH, parameter <mod> can take value 3 only, while AT+FRM and AT+FTM never support

<mod>=3.

Table 12.1: Fax Result Codes

AT+FCLASS Parameter Service class Reference, Standard

0Data modem e.g. TIA/EIA-602 or ITU V.250

1Service Class 1 EIA/TIA-578-A

<mod>(num)

Result Code Meaning

+FCERROR This facsimile error message notifies the DTE that the DCE has

received a different signal (tone or carrier) than expected. This

allows the DTE to recover by requesting the DCE to look for an

alternative tone or carrier signal.