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Chapter 10 − Modem Mode AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A) 103
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, optionally specifies the acceptable fallback 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 answerer. It
accepts three numeric subparameters:
Defined Values: <orig_rqst> Decimal number which 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 which 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.
3 LAPM error control required; disconnect if error control is not established.
4 MNP error control required; disconnect if error control is not established.
<ans_fbk> Decimal number which specifies the acceptable fallback mode of operation
when the modem is operating as the answerer.
0 Direct Mode.
1 Error control disabled, use Normal Mode.
2 LAPM, MNP, or Normal Mode error control optional. (Default.)
3 LAPM, MNP, or Direct Mode error control optional.
4 LAPM or MNP error control required; disconnect if error control is not
established.
5 LAPM error control required; disconnect if error control is not established.
6 MNP error control required; disconnect if error control is not established.
Reporting Current or Selected Values:
Command: +ES?
Reporting Supported Range of Parameter Values:
Command: +ES=?
Command:
+ESR Selective Reject
Values: n/a
Description: This extended-format numeric parameter controls the use of the selective reject (SREJ)
option in V.42.
Reporting Current or Selected Values:
Command: +ESR?
Reporting Supported Range of Parameter Values:
Command: +ESR=?