Comtrol AT Command Set Rev A - Manual (Page 165)

AT Commands Reference Manual
100722B Conexant 4-15
+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)
1 <DLE> <SUB> (not supported)
Reporting Current or Selected Values
Command: +FDD?
Response: +FDD: <value>
Example: +FDD: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +FDD=?
Response: +FDD: (<value> range)
Example: +FDD: (0)