Synxcom SM9234D, User Manual

Page: 160 / 216

AT Commands
Page 160
Service Class 1 Parameters
+FAR - Adaptive Reception Control
If Adaptive Reception is enabled, the modem adaptively detects the selected
message carrier or V.21 control messages. If the expected carrier is detected, the
modem operates as specified in the respective FRM= mo
or
FRH= mo commands. If V.21 flag preamble is detected instead, the modem
issues a FRH:3 intermediate result code, and then executes an implied FRH=3
command.
Write Syntax
FAR= value
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disable Adaptive Reception. (Default.)
1 Enable Adaptive Reception.
Reporting Current or Selected Values
Command:
FAR?
Response: FAR: value
Example: +FAR: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command:
FAR?
Response: +FAR: (<value> range )
Example: +FAR: (0,1)
+FCL - Carrier Loss Timeout
This parameter allows the DTE to select the modem’s loss-of-carrier delay
between initial loss-of-carrier and qualified loss-of-carrier, when the modem will
give up and exit a receive mode. Intermediate (less than FCL timeout) loss-of-
carrier should be indicated by insertion of the SQ-BAD signal quality indicator in
the received data stream.
In unframed receive modes, if the modem detects RTC as described in
Recommendation T.30 prior to initial loss of the high speed carrier, or if the
modem detects V.21 carrier after initial loss of high speed carrier, then the modem
immediately accepts the loss-of-carrier as qualified, without waiting for the FCL
timer to expire.
In HDLC receive modes, if the modem detects HDLC abort prior to initial loss of
the high speed carrier, or if the modem detects V.21 carrier after initial loss of high
speed carrier, then the modem l immediately accepts the loss-of-carrier as
qualified, without waiting for the FCL timer to expire.
Write Syntax FCL= tim
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disable Adaptive Reception. (Default.)