Multi-Tech Systems MT5600SMI-L32 manual V.8bis Commands, Command +A8E V.8bis Operation Controls

Chapter 5 – AT Commands, S-Registers, and Result Codes

V.8/V.8bis Commands

Command: +A8E	V.8 and V.8bis Operation Controls
Description:	This command is defined for two conditions: as a parameter while the
	modem is on-hook, and as an action command while the modem is off-
	hook. If enabled, V.8 negotiation does not preclude simultaneous
	implementation of other negotiation means (e.g., V.8bis, V.18, V.32bis
	Annex A).
	This command is a compound parameter 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, regardless of the state of the +FCLASS parameter.
	This command is an action command 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.
Defined Values:	<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.
	<v8cf>= Set the V.8 CI signal call function to the hexadecimal octet XY.
		00 (Default.)
		21
		C1
	<v8b>= Decimal number which enables/disables V.8bis negotiation.
	0	Disable V.8bis negotiation.
	1	Enable V.8bis negotiation. (Default.)
	<cfrange>= “<string of values>“. Applicable only for <v8a>=5.
		Not supported.
	< protrange >= “<string of values>“. Applicable only for <v8a>=5.
		Not supported.
Default values:	1,1,00,1,0,0
	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.
Report Commands:	+A8E? Reports Current or Selected Values.
	Response: +A8E:

<v8o>,<v8a>,<v8cf>[,<v8b>][,<cfrange>][,<protrange>] Example: +A8E: 1,1,00,1,0,0 For the defaults

+A8E=? Reports Supported Range of Parameter Values.

Response: +A8E: (<v8o> range),(<v8a> range),(v8cf in octets), (<v8b> range),(<cfrange>),(<protrange>)

Example: +A8E: (1,6),(1,5),(0,21,C1),(0,1),(0),(0)

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 63