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Data Mode AT COMMANDS

Table 18. Data Mode Command Descriptions (Continued)

Command Default Description

V.8 and V.8 bis Operation Controls: This command configures V.8 and V.8 bis operation. If issued when the DCE is on-hook, this command is a compound parameter used to precondition V.8 and V.8 bis originating and answering operation. It is not supported as an action command while the DCE is off-hook. If enabled, V.8 negotiation does not preclude simultaneous implementation of other means of negotiation (for example, V.8 bis, V.18, and V.32 bis Annex A).

For the +A8E default values, the signal indicators are not generated by the DCE. When the parameters <v8o>=6 and <v8a>=5, the +A8I, +A8C, +A8A, +A8J, and +A8M indications are sent from the DTE, but the +A8M command is not used because the DCE controls the V.8 section.

m = <v8o>, <v8a>, <v8cf>, <v8b>,<cfrange>, <protrange> Defaults: 1, 1, C1, 0, ,

<v8o> V.8 origination selection.

Range: 0, 1, 6
0	Disable V.8 origination negotiation
1*	DCE-controlled V.8 origination negotiation
6	DCE-controlled V.8 origination negotiation, enable indications only
<v8a> V.8 answer selection.
Range: 0, 1, 5
0	Disable V.8 answer negotiation
1*	DCE-controlled V.8 answer negotiation
5	DCE-controlled V.8 answer negotiation, enable indications only
<v8cf> V.8 call function
+A8E=m see ‘m’ Range: 0x21, 0xC1
0x21	Sets the V.8 call function to indicate H.324.
0xC1*	Sets the V.8 call function to indicate standard data mode.
<v8b> V.8 bis control
Range: 0
0*	Disable V.8 bis negotiation
<cfrange> Not supported.
<protrange> Not supported.
Indication	Definition

+A8A:1

+A8A:2

Indicates V.8 ANSam has been detected. This indication is only sent to the DTE if +A8E<v8o>=6 and operating in originate mode.

Indicates V.25 answer tone (2100 Hz) has been detected. This indication is only sent to the DTE if +A8E<v8o>=6 and operating in originate mode.

+A8I:<v8cf> Indicates the detection of a V.8 CI-signal and the recovered call function (only if +A8E<v8a>=5 and operating in answer mode).

+A8M:<CM>Indicates the hexadecimal-coded CM signal (only if +A8E<v8a>=5 and operating in answer mode)

+A8M:<JM> Indicates the hexadecimal-coded JM signal (only if +A8E<v8o>=6 and operating in originate mode)

Indicates the modem is transmitting the V.8 termination signal. +A8J:1 indicates +A8J:[0,1] transmission or detection of CJ while +A8J:0 indicates time-out while waiting for a CJ

signal.

NOTE: An asterisk (*) denotes the factory-default setting.

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