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Chapter 1 – AT Commands, S-Registers, and Result Codes
+ES
Description:
Syntax:
Values:
Reports :
Result Codes:
+ESA
Description:
Syntax:
Values:
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 Mode
+ES=1,0,1 Buffered mode
+ES=0,1,0 Direct mode
+ES=4,4,6 MNP or disconnect mode
+ES=3,3,5 LAPM or disconnect mode
+ES=4,0,6 MNP or buffered mode
+ES=3,0,2 LAPM, MNP, or buffered mode (Default)
+ES=2,0,2 LAPM or buffered mode
+ES=3,2,4 LAPM, MNP, or disconnect mode
+ES=,,8 V.42 sync buffer mode (V.80 enabled)
+ES=6,,8 V.42 sync buffer mode (V.80 enabled)
+ES? Reports current or selected options.
+ES=? Reports supported options.
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 Meaning
+ESA=0,,,,0,0,, Disables CRC generation and checking.
+ESA=0,,,,1,0,, Causes the DCE to generate a 16-bit CRC in the
transmit direction in framed sub-Mode and check the CRC in the receive direction.
<crc_type> Values: 0 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.
Result Codes: OK
ERROR
+ETBM
Description:
Syntax:
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
Values:
<pending_TD>
<pending_RD>
<timer>
0 specifies that disconnect will occur immediately and all buffered
transmit data will be discarded when the local DTE requests call
disconnection.
0 specifies that disconnect will occur immediately and all buffered
receive data will be discarded when the local DTE requests call
disconnection.
0 specifies that the modem will not attempt to deliver the buffered
data before abandoning the attempt and discarding remaining
data.
Reports :
Result Codes:
+ETBM? Reports current or selected options.
+ETBM=? Reports supported options.
OK
ERROR
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
27
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