Fax Class 1
3-428 AT Commands Reference Manual December 31, 2007
+FRM, Receive Data
This command causes the G24 to receive data from the remote party using the modulation
specified in <MOD>.
When the G24 receives the +FRM command it immediately returns a CONNECT result code.
When the terminal receives the CONNECT from G24, it can start receiving the data stream using
the transparent data command decoding. (Refer to Table 3-284, on page 3-427.)
When the G24 receives the +FRM command, it checks the line for a carrier. If the G24 detects a
carrier, it sends a CONNECT to the terminal, and starts receiving the fax page.
Upon data stream termination, the G24 sends the termination sequence to the terminal.
Afterwards, if the G24 detects a loss of carrier, it sends a "NO CARRIER", otherwise it sends
OK.
The following table shows the command modulation select codes.
+FTH, Transmit DATA with HDLC Frame
This command causes the G24 to transmit data framed in the HDLC protocol, using the
modulation mode selected, to the remote party.
For encoding and decoding information refer to “Transmission Using the Transparent Data
Command” on page 3-426.
Command Type Syntax Response/Action Remarks
Set
+FRM = <MOD> CONNECT
Data stream
<DLE><ETX>
OK
The Set command causes the G24 to
enter the receive mode using the
modulation specified in <MOD>
Test
+FRM=? (list of supported
<MOD>s)
OK
or:
+CME ERROR: <err>
Table 3-285: Command Modulation Select Codes -Modulation Parameters
<MOD> Value Modulation TrainTime Rate (bit/s) Required
24 Rec. V.27 ter 2 400
48 Rec. V.27 ter 4 800
72 Rec. V.29 7 200
96 Rec. V.29 9 600
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