Intel 537EX User Manual
Page 75
536EX Chipset Developer’s Manual
75
Intel Confidential
IS-101 Voice Mode AT Commands
+VEM=m
(cont.)
see ‘m’
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
command mode and is followed when changing between voice modes. That is, the modem uses the
event mask previously set by the +VEM=m command when entering playback or record mode. The
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.
+VGM=m
128
Speakerphone Microphone Gain: This command sets the speakerphone’s microphone gain.
Range: 121–131
128*
Nominal value
+VGR=m
128
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
line, local handset, local telephone, or microphone.
Range: 121–131
128*
Nominal recording level
+VGS=m
128
Speakerphone Speaker Gain: This command sets the speakerphone’s speaker gain.
Range: 121–131
128*
121
Gain smaller than normal
131
Gain larger than normal
Table 25. Voice Mode Command Descriptions (Continued)
Command
Default
Description
NOTE: An asterisk (*) denotes the factory-default setting.
16 17 18 19
8 9 10 11
4
3
4 5 6 7
2
0 1 2 3
1
5
6
7
8
EVENT
24 25 26 27
28 29 30 31
12 13 14 15
BIT VALUE
0 1 1 0
1 0 0 0
1 0 1 1
1 0 1 1
0 0 11
1 1 1 0
1 1 1 0
0 0 0 0
EX VALUE
HEX DIGIT
B
B
8
6
3
E
E
0
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
20 21 22 23
LOCATION