Intel 537EX manual Intel Confidential, Data Mode AT COMMANDS, 536EX Chipset Developer’s Manual

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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