Black Box MD1650A-JP, Reference Manual

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CHAPTER 2: AT Commands
25
Command: +EFCS 32-bit Frame Check Sequence
Description: This extended-format numeric parameter controls the use of the 16-bit
or 32-bit frame check sequence (FCS) option in V.42.
Values: <value> Decimal number 0 specifying the use of the 16-bit FCS
specified in V42.
+EFCS?
Reports current or selected values.
+EFCS=? Reports supported range of parameter values.
Command: +ER Error Control Reporting
Description: This extended-format numeric parameter controls whether or not the
intermediate result code is transmitted from the modem to the DTE.
S95 bit 3 is reset to 0 for +ER=0 and is set to a 1 for +ER=1. The more
recent setting of +ER or S95 bit 3, and the W command setting,
determines the actual error control result code reporting (see S95
Parameter and W Command).
Values: 0, 1
0=Error control reporting disabled (no +ER intermediate result code
transmitted).
1=Error control reporting enabled (+ER intermediate result code
transmitted).
Default: 0
Report Commands: +ER? Reports current or selected values.
+ER=? Reports supported range of parameter values.
Command: +ES Error Control Selection
Description: This extended format command specifies the initial requested mode of
operation when the modem is operating as the originator, and
optionally specifies the acceptable fallback mode of operation when the
modem is operating as the answering modem. It accepts three numeric
subparameters: +ES=[<orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]
Subparameters: <orig_rqst> Decimal number that specifies the initial requested mode
of operation when the modem is operating as the originator. The
options are:
0
Initiate call with Direct Mode.
1 Initiate call with Normal Mode (also referred to as Buffered
Mode) only.
2 Initiate V.42 without Detection Phase. If V.8 is in use, disable
V.42 Detection Phase.
3 Initiate V.42 with Detection Phase. Default.
4 Initiate MNP.
7 Initiate Frame Tunneling Mode when connection is complete
and Data Mode is entered.
<orig_fbk> Decimal number that specifies the acceptable fallback mode
of operation when the modem is operating as the originator.
0
LAPM, MNP, or Normal Mode error control optional. Default.
1 LAPM, MNP, or Direct Mode error control optional.
2 LAPM or MNP error control required; disconnect if error
control is not established.