Comtrol AT Commands for SmartACFL - Manual (Page 116)

Command Reference Manual
4-10 Conexant 100722A
4.2.3 Service Class 1 Parameters
4.2.3.1 +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=<mod> or +FRH=<mod>
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)
4.2.3.2 +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=<time>
Defined Values
<value> Decimal number representing the loss-of-carrier delay time in units of 100 ms. The range is 0 -
255.
Reporting Current or Selected Values
Command: +FCL?
Response:
+FCL: <time>
Example: +FCS: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +FCL=?
Response:
+FCL: ( <time> range)
Example: +FCL: (0-255)
4.2.3.3 +FDD - Double Escape Character Replacement
This parameter conditions the use of the DLE
SUB pair to encode consecutive <1/0>€<1/0> in data. This may be used
to prevent unbound expansion of data that contains many <1/0> patterns.