Intel 536EX manual Intel Confidential, Data Mode AT COMMANDS, modulations

Data Mode AT COMMANDS

Table 18. Data Mode Command Descriptions (Continued)

Command	Default		Description
		Modulation Automode Control: This command specifies the alternative to the preferred modulation
		specified in the +MS=<carrier> command. Alternative modulations are only available when
		+MS=,<automode> enables automode. The alternative modulations available for the +MA command are
		limited to all modulations the modem supports below the preferred modulation specified by
		+MS=<carrier>. The +MA parameters are reset to all modulations supported by the modem below the
		preferred modulation whenever the +MS=<carrier> changes the preferred modulation. The order of
		priority of alternative modulations is determined by such mechanisms as V.8 and PN2330, not the order
		in which they were entered for this command. <carrier> values omitted are no available as alternative
		modulations.
		m= <carrier>,<carrier>,…<carrier>
+MA=m	none	Defaults: all modulations below +MS=<carrier> and allowed by the DCE limits in the +MS command
		<carrier> specifies the alternative modulations that are available. A table of these modulations are given
		in +MS command description.
		+MA? will display a list of enabled alternative modulations
		+MA=? will display a list of available alternative modulations. This list is determined by the current values
		of the +MS parameters for preferred modulation, automode and DTE rate limits. For example:
			If +MS=<V32B>, V.34, V.90, and V.92 will not be available because they are above V.32 bis.
			If +MS = ,0,, no alternative modulations will be available.
			If +MS=V34,1,4800,33600, V.22 bis will not be available because its maximum DCE bit rate is
			2400bps.
		Modulation Reporting Control: Controls whether the “+MCR: and +MRR” result codes are transmitted
		from the DCE to the DTE once a connection has been made. If enabled the result code displayed shall
		represent the current negotiated DCE-DCE modulation and rate, and are issued before the Error Control
		(+ER:) or Data Compression reports (+DR:) and before the final result code “CONNECT”. The format is
		as follows:
+MR=m	0	0	Disables reporting of modulation (no +MCR and +MRR intermediate result code
			transmitted)
		1	Enables reporting of modulation (+MCR and +MRR intermediate result code transmitted)
		Example if +MR = 1
		+MCR: V34
		+MRR: 33600
NOTE: An asterisk (*) denotes the factory-default setting.

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