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536EX Chipset Developer’s Manual 47
Intel Confidential
Data Mode AT COMMANDS
+A8E=m see ‘m’
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
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.
Table 18. Data Mode Command Descriptions (Continued)
Command Default Description
NOTE: An asterisk (*) denotes the factory-default setting.
Indication Definition
+A8A:1
Indicates V.8 ANSam has been detected. This indication is only sent to the DTE if
+A8E<v8o>=6 and operating in originate mode.
+A8A:2
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)
+A8J:[0,1]
Indicates the modem is transmitting the V.8 termination signal. +A8J:1 indicates
transmission or detection of CJ while +A8J:0 indicates time-out while waiting for a CJ
signal.