Specifications

Chapter 12 – FAX Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 169
12.3 AT+FRH Receive Data Using HDLC Framing
Description: The AT+FRH command enables the TA to receive frames using the HDLC protocol and
the modulation defined in Section 12.1, FAX parameters. An ERROR response code
results if this command is issued while the modem is on-hook.
Write Command Syntax: AT+FRH=<mod>
Response: CONNECT
If error related to ME functionality
ERROR
Note: Used for Fax Class 1 only.
12.4 AT+FRM Receive Data
Description: The AT+FRM command causes the TA to enter the receive mode using the modulation
defined in Section 12.1, FAX parameters. An ERROR response code results if this
command is issued while the modem is on-hook.
Test Command Syntax: AT+FRM=?
Response: (list of <mod>s)
OK
Write Command Syntax: AT+FRM=<mod>
Response: CONNECT
If error is related to ME functionality:
ERROR
Notes:
• Used for Fax Class 1 only.
• <mod>= 3 is not possible.
12.5 AT+FRS Receive Silence
Description: <time>=n 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. The 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 Syntax: AT+FRS=<time>
Response: OK
If error related to ME functionality
ERROR
Parameter Description:
<time>
Number of 10 millisecond intervals
0...255
Note: Used for Fax Class 1 only.
12.6 AT+FTH Transmit Data Using HDLC Framing
Description: The AT+FTH command causes the TA to transmit data using HDLC protocol and the
modulation mode defined in Section 12.1, FAX parameters. An ERROR response code
results if this command is issued while the modem is on-hook
Write Command Syntax: AT+FTH=<mod>
Response: CONNECT
Notes:
• Used for Fax Class 1 only.
• Only <mod>= 3 is possible.