Eb Break Handling In Error Control Operation; Efcs 32-Bit Frame Check Sequence; Er Error Control Report - Multitech MultiModem SocketModem MT9234 Series At Commands Reference Manual

+EB
Description:
Syntax:
<break selection> Values:
<default_length> Values:
Reports:
+EFCS
Description:
Syntax:
Value:
Reports:
+ER
Description:
Syntax:
Values:
Reports:
Result Codes:
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
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Chapter 1 – AT Commands, S-Registers, and Result Codes
Break Handling in Error Control Operation
This extended-format compound parameter controls the break handling in V.42
operation. It accepts three numeric subparameters.
AT+EB=<break_selection>,<default_length>
0 Ignore break. Default.
1 Nonexpedited, nondestructive.
2 Expedited, nondestructive.
3 Expedited, destructive.
10 ms to 90 ms Specify break length.
+EB=? Reports supported options.
+EB? Reports current or selected options.
32-bit Frame Check Sequence
This extended-format numeric parameter controls the use of the 16-bit or 32-bit frame
check sequence (FCS) option in V.42.
AT+EFCS=<value>
0 Sets the 32-bit frame check sequence to a 16-bit frame check sequence.
+EFCS? Reports current or selected options.
+EFCS=? Reports supported options.
Error Control Report
Use this command to enable or disable the error control report.
AT+ER<value>
+ER0 Error control reporting disabled (no +ER intermediate result code
transmitted). Default.
+ER1 Error control reporting enabled (+ER intermediate result code transmitted).
+ER? Reports current or selected options.
+ER=? Reports supported options.
+ER <type> The +ER <type> reported is the current (negotiated or renegotiated)
modem-modem error control type. If enabled, the intermediate result code is
transmitted at the point during error control negotiation (handshaking) at
which the modem has determined which error control protocol will be used (if
any), before the final result code (e.g., CONNECT) is transmitted.
Specifically, the +ER intermediate result code is issued after the modulation
report (+MCR and +MRR) and before the data compression report (+DR).
+ER: NONE Data compression not in use.
+ER: LAPM V.42 LAPM protocol is in use.
+ER: ALT V.42 alternative protocol is in use.
OK if <value> = 0, 1.
if <value> ≠ 0, 1.
ERROR
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