Error Control Selection; Esa Set Up Error Control Parameters; Etbm Call Termination Buffer Management - Multitech MultiModem SocketModem MT9234 Series At Commands Reference Manual

+ES
Description:
Syntax:
Values:
Reports:
Result Codes:
+ESA
Description:
Syntax:
Values:
<crc_type> Values: 0
Result Codes:
+ETBM
Description:
Syntax:
Values:
Reports:
Result Codes:
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
Downloaded from Elcodis.com electronic components distributor
Chapter 1 – AT Commands, S-Registers, and Result Codes

Error Control Selection

Use this command to select the error correction mode. If the modem is operating in
V.80 mode (synchronous buffered mode), and +ES=,,8, the +ES? will always return
+ES: 6,,8. The setting of this command overwrites the \N command, and the +ES
command is overwritten by the setting on a \N command.
AT+ES=<orig_rqst>,<orig_fbk>,<ans_fbk>
Values Combination
+ES=1,0,1
+ES=0,1,0
+ES=4,4,6
+ES=3,3,5
+ES=4,0,6
+ES=3,0,2
+ES=2,0,2
+ES=3,2,4
+ES=,,8
+ES=6,,8
+ES?
+ES=?
OK
ERROR
Set Up Error Control Parameters
Sets the control parameters for the DCE in Synchronous Access Mode.
AT+ESA=<trans_idle>,<frame_idle>,<crc_type>,<nrzi_en>
Values Combination
+ESA=0,,,,0,0,,
+ESA=0,,,,1,0,,
transmit direction in framed sub-Mode and check the CRC in the receive direction.
Disable CRC generation and checking.
1 In framed submode, the 16-bit CRC specified in V.42 is generated by the DCE
in the transmit direction and checked by the DCE in the receive direction.
OK
ERROR
Call Termination Buffer Management
Sets the behavior of the modem upon call termination. Only +ETBM=0,0,0 is a valid
combination. This means that the modem will discard all the buffered data when the
call is terminated.
AT+ETBM=<pending_TD>,<pending_RD>,<timer>
AT+ETBM=0,0,0
<pending_TD> 0 specifies that disconnect will occur immediately and all buffered
transmit data will be discarded when the local DTE requests call
disconnection.
<pending_RD> 0 specifies that disconnect will occur immediately and all buffered
receive data will be discarded when the local DTE requests call
disconnection.
<timer> 0 specifies that the modem will not attempt to deliver the buffered
data before abandoning the attempt and discarding remaining
data.
+ETBM? Reports current or selected options.
+ETBM=? Reports supported options.
OK
ERROR
Mode
Buffered mode
Direct mode
MNP or disconnect mode
LAPM or disconnect mode
MNP or buffered mode
LAPM, MNP, or buffered mode (Default)
LAPM or buffered mode
LAPM, MNP, or disconnect mode
V.42 sync buffer mode (V.80 enabled)
V.42 sync buffer mode (V.80 enabled)
Reports current or selected options.
Reports supported options.
Meaning
Disables CRC generation and checking.
Causes the DCE to generate a 16-bit CRC in the
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