Intel 537EX manual Intel Confidential

IS-101 Voice Mode AT Commands

Table 25. Voice Mode Command Descriptions (Continued)

Command	Default	Description
		Event Reporting and Masking: (cont.)
		Example 1. Viewing Supported Events:
		To determine what events are supported by the modem, send ‘AT+VEM=?’.
		AT+VEM=?
		‘C’ ← Feature Class
		DB860980 ← Playback mode events
		OFEE0883 ← Record mode events
		BB863EE0 ← Command mode events
		OK
		Example 2. Setting the Event Mask:
		To set the event mask, issue AT+VEM=m, where ‘m’ is eight hex digits. This command is issued only in
+VEM=m		command mode and is followed when changing between voice modes. That is, the modem uses the
	see ‘m’	event mask previously set by the +VEM=m command when entering playback or record mode. The
(cont.)
		modem ignores any event bit set when that feature is not supported in that voice mode.
		AT+VEM=BB863EE0
		Example 3. Reading the Event Mask Settings:
		To read the settings for each event, type:
		AT+VEM?
		BB863EE0
		OK
		Example 4. Understanding the +VEM Hexadecimal Code:
		The following illustration shows how the hexadecimal eight-digit code (BB863EE0) is derived from the
		bit setting for each event:
		HEX DIGIT LOCATION: 1 2 3 4 5 6 7 8
		EIGHT-DIGIT HEX CODE: B B 8 6 3 E E 0
		The following example shows how to read the string.

EX VALUE	B	B	8	6	3	E	E	0
BIT VALUE	} }		} }		}	}	} }
	1 0 1 1	1 0 1 1	1 0 0 0	0 1 1 0	0 0 11	1 1 1 0	1 1 1 0	0 0 0 0
EVENT	0 1 2 3	4 5 6 7	8 9 10 11	12 13 14 15	16 17 18 19	20 21 22 23	24 25 26 27	28 29 30 31
HEX DIGIT	} }		} }		}	}	} }
	1	2	3	4	5	6	7	8
LOCATION
		Speakerphone Microphone Gain: This command sets the speakerphone’s microphone gain.
+VGM=m	128	Range: 121–131
		128*	Nominal value
		Receive Gain Selection: This command sets the recording level for the modem’s voice mode. A
		different recording level may be needed for each type of recording device. This includes telephone
+VGR=m	128	line, local handset, local telephone, or microphone.
		Range: 121–131
		128*	Nominal recording level
		Speakerphone Speaker Gain: This command sets the speakerphone’s speaker gain.
		Range: 121–131
+VGS=m	128	128*
		121	Gain smaller than normal
		131	Gain larger than normal
NOTE: An asterisk (*) denotes the factory-default setting.
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