Command Speed Response; A8E V.8 And V.8Bis Operation Controls - Multitech MultiModem SocketModem MT9234 Series At Commands Reference Manual

%S
Description:
Syntax:
Values:
Default:
+A8E
Description:
Syntax:
<v8o> Values:
<v8a> Values:
<v8b> Values:
<v8cf> Values
Reporting:
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

Command Speed Response

Sets the modem to respond to AT commands at desired speeds.
Note: This command does not work with parallel, USB, PCI, PCIe.
AT%S<value>
0 Sets modem to respond to AT commands at all normal speeds.
1 AT commands accepted at 115200 bps only. Other speeds are ignored.
0
V.8 and V.8bis Operation Controls
Use this command to set the control parameters for early call negotiation through V.8
and V.8bis. +A8E may also be used as an action command to reinitiate V.8 or V.8 bis
if an earlier attempt to use either protocol has failed. (ITU-T Recommendation V.251
(02/98) standardized this command. However, the controller-based command set
only includes partial support for the standard.)
On-Hook: If issued while the modem is on-hook, used to precondition V.8 and V.8bis
originating and answering operation. It is issued by the DTE before the Dial (D) or
Answer (A) command.
Off-Hook: If issued while the modem is off-hook, to (re)start V.8 or V.8bis
negotiation. For example, if initial V.8 negotiation failed, but subsequent T.30
negotiation indicated V.8 capability, this command may be used to initiate V.8
negotiation.
The ATD and ATA commands behave as specified in V.250, and +A8n indications
are not generated by the modem.
For subparameter values <v8o>=6 and <v8a>=5, the +A8I indications are issued
during the course of the V.8 session to notify the DTE when the relevant V.8 signals
are received.
<v8o> enables or disables DCE-controlled V.8 origination negotiation.
<v8a> enables or disables DCE-controlled V.8 answer negotiation.
<v8b> disables V.8 negotiation or sets it to DCE controlled or DTE controlled
negotiation.
<a8cf> sets the V.8 CI signal call function to the value specified.
The valid range for this parameter is 0 to FF, with a default of 0xC1.
AT+A8E=<v8o>,<v8a>,<v8cf>,<v8b>
<v8o> Decimal number which enables/disables issuance of +A8x indications during
modem-controlled V.8 origination negotiation.
1 Enable DCE-controlled V.8 origination negotiation without +A8x
indications. (Default)
6 Enable DCE-controlled V.8 origination negotiation with +A8x indications.
<v8a> Decimal number which enables/disables issuance of +A8x indications during
modem-controlled V.8 answer negotiation.
1 Enable DCE-controlled V.8 answer negotiation without +A8x indications.
(Default)
5 Enable DCE-controlled V.8 answer negotiation with +A8x indications.
<v8b> Decimal number which enables/disables V.8bis negotiation.
0 Disable V.8 negotiation.
1 Enable DCE-controlled V.8bis negotiation. (Default)
2 Enable DTE-controlled V.8 negotiation.
<v8cf> Set the V.8 CI signal call function to the hexadecimal octet XY.
00 (Default)
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C1
+A8E? Reports current or selected values.
+A8E=? Reports supported parameter values.
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