Fcl - Carrier Loss Timeout; Fdd - Double Escape Character Replacement - AOpen FM56 Manual

<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)

4.2.2.2 +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)

4.2.2.3 +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.
Syntax
+FDD=<value>
Defined Values
<value> Decimal number corresponding to the selected option. For modem decode of
<DLE><SUB>, the defined range are:
0 <DLE> <DLE> or discard (default and only)
1 <DLE> <DLE> (not supported)
For modem encoding of <1/0> <1/0>the defined values are:
0 <DLE> <DLE> <DLE> <DLE> (default and only)