Specifications

AT command set for XX Siemens mobile phones and modems
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Document No.: A30880-A10-A001-XX-
D376
Revision: Master R75
Revision Date: 29. September.2004
89
Used for FAX class 1 only
This command causes the TA to receive frames using the HDLC protocol and the modulation
defined below. An ERROR response code results if this command is issued while the modem is on-
hook.
Execute command Response:
AT+FRH=<mod>
CONNECT/ERROR
Parameter:
<mod>
modulation mode
3
V21 Ch2 300 bps
AT+FRM
AT+FRM Receive Data
Test command
AT+FRM=?
Used for FAX class 1 only
This command causes the TA to enter the receiver-mode using the
modulation defined below.
An ERROR response code results if this command is issued while the modem
is on-hook
Response:
(List of supported modulation modes <mod>s)
OK/ERROR/+CME ERROR
Parameter:
<mod>
96
V.29 9600 bps See [21]
72
V.29 7200 bps See [21]
48
V.27ter 4800 bps See [22]
24
V.27ter 2400 bps See [22]
Write command Response:
AT+FRM=<mod>
CONNECT
Parameter
<mod>
See Test command
AT+FRS
AT+FRS Receive Silence
Used for FAX class 1 only
This command causes the TA to report an OK result code to the TE after <time> 10 millisecond
intervals of silence have been detected on the line. This command is aborted if any character is
received by the DTE. The modem discards the aborting character and issues an OK result code. An
ERROR response code results if this command is issued while the mode is on-hook.
Write command Response:
AT+FRS=<time>
(List of supported modulation modes <mod>s)
OK
Parameter
<time>
0 .. 255 number of 10 millisecond intervals
AT+FTH
AT+FTH Transmit Data Using HDLC Framing
Read command
Used for FAX class 1 only