Compaq Armada 1500 Service Manual Addendum page 29

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Table C-2, AT Commands,
Command
%Cn
+FCLASS=8
+VIP
+VDR
+VGS
+VGT
+VGM
+VGR
+VEM
+VIT
Addendum 255318-001 to Guide 284820-001
Continued
Description
Data Compression Control. %Cn determines the operation of V.42bis and MNP class 5 data
compression. Online changes do not take effect until a disconnect occurs first.
0: Disables V.42bis/ MNP 5 data compression.
1: Enables MNP 5 data compression. (default)
Enter Voice Mode. The command AT+FCLASS=8 puts the modem in voice mode.
Speakerphone and TAD modes are subsumed under the more general heading of voice
mode, and use a particular subset of voice mode commands to implement their respective
features and functions. The modem controller will maintain the overall state of the system
so as to know when voice commands are issued in the context of using the speakerphone
or other voice contexts.
Initialize Voice Parameters. The command AT+VIP causes the modem to initialize all the
voice parameters to their default values. The command has no effect on the +FCLASS
setting
Distinctive Ringing & Cadence Report. This command will enable the distinctive ringing
feature. This will allow a report of DROF/DRON to follow an exact ring cadence coming over
the phone line.
+VDR=<enable>,<report>
+VDR?: Returns the current values of <enable> and <report>
+VDR=?: Queries the DCE for the range of supported distinctive ring
(Same as +VGT)
Speaker Volume Control. This command will enable the speaker volume control.
+VGT=<level>
<level> is 0-255
<level>=128: Nominal volume level for sending to speaker
+VGT=? Returns the current microphone gain setting.
+VGT=? (0-255)
(same as +VGR)
Receive Gain Selection. This command will enable the receive microphone gain control.
<gain> is 0—255: the only useful range is 121—134
<gain>=128: Nominal level for receive gain from microphone
Speakerphone mode—This command may be used to control the gain to the remote caller.
+VGR? Returns the current receive gain setting.
+VGR= (0-255)
Event Reporting and Masking. The DTE can use this command to disable anevent report
regardless of the DCE state, or of the analog signal source or destination configuration.
Mask is Bits 0—33 (i.e., FFFFFFFFC). See the IS-101 specification for defined bit values.
+VEM=<mask>
+VEM? Returns the current values of the mask
+VEM=? Queries the DCE for the range of supported service level events
DTE/DCE Inactivity Timer. This command sets the DCE's value for the DTE/DCE inactivity
timer. The units are in one seconds.
+VIT? Returns the current value of the timer
+VIT=? Queries the DCE for the range of supported values.
Addendum to Compaq Armada 1500
Maintenance and Service Guide
configurations
Continued
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