Chapter 3: AT Commands Reference
June 30, 2008 AT Commands Reference Manual 3 -43
+MVC, Motorola Vocoders Configuration

This AT command is used to choose and configure the priority order of the supported voice

codecs (vocoders).

The phone will restart 10 seconds after the set command execution completed. Changes take

effect after restart.

The following table shows the +MVC parameters.

Example
AT+MVC=0
OK
AT+MVC=1,1,3,5
OK
// Delay 10 sec. Restart.
AT+MVC?
+MVC: 1,2,3
OK
AT+MVC=?
+MVC: (0-1),(1-5), (1-5), (1-5), (1-5), (1-5)
OK
Command
Type Syntax Response/Action Remarks
Set AT+MVC=<n>[,<p1>[,<
p2>[,<p3>[,<p4>[,<p5>]
]]]]
OK
or:
+CME ERROR: <err>
The command will save new vocoders
configuration or restore the default
configuration, wait 10 sec and restart
the phone.
Read AT+MVC? +MVC:
<p1>[,<p2>[,<p3>[,<p4>
[,<p5>]]]]
OK
or:
+CME ERROR: <err>
The command will read the current
vocoders values.
Test AT+MVC=? +MVC:
(0-1),(1-5) ,(1-5) ,(1-5)
,(1-5) ,(1-5)
OK
The command shall return the list of
supported
<n>,<p1>,<p2>,<p3>,<p4>,<p5>
values.

Table 3-19: +MVC Parameters

<Parameter> Description
<n> 0 Restore default vocoder configuration.
1 Set vocoders and their priority order.
<p1>,<p2>,<p3>
,<p4>,<p5> 1 GSM full rate speech version 1.
2 GSM half rate speech version 1.
3 GSM full rate speech version 2 (EFR).
4 GSM full rate speech version 3 (AMR Full Rate).
5 GSM half rate speech version 3 (AMR Half Rate).