Service class 1 parameters, Far - adaptive reception control, Write syntax – Longshine LCS-8560C1 User Manual
Page 183: Defined values, Reporting current or selected values, Reporting supported range of parameter values

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
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Conexant
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+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=
Defined Values
Decimal number corresponding to the selected option. For
modem decode of
0
1
For modem encoding of <1/0> <1/0>the defined values are:
0
only)
1
Reporting Current or Selected Values
Command: +FDD?
Response: +FDD:
Example:
+FDD: 0
For the default setting.
Reporting Supported Range of Parameter Values
Command: +FDD=?
Response: +FDD: (
Example: +FDD:
(0)