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Chapter 13 – Specific AT Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 119
Voice Rate +WVR
Description: This command allows the voice rate for bearer voice to be configured for outgoing and incoming calls.
Note: According to the modem’s capabilities, the following voice coding type are allowed:
• Modem that supports AMR: FR, EFR, AMR-FR, AMR-HR are supported.
• Modem that does not support AMR: FR, EFR, HR are supported.
Values: Voice coding type.
V
oice Coding
Type
Preferred
Type
Other Supported Types Default Values
0 FR Default incoming voice calls rate
1 EFR FR
2 HR FR
3 FR HR
4 HR EFR
5 EFR HR, FR Default outgoing voice calls rate
6 AMR-FR EFR, AMR-HR, FR
7 AMR-FR EFR, AMR-HR, HR, FR
8 AMR-HR HR, AMR-FR, EFR, FR
9 AMR-HR AMR-FR, EFR, FR
10 AMR-HR AMR-FR, FR
11 AMR-HR HR, AMR-FR, FR
12 AMR-FR AMR-HR, FR
13 AMR-FR FR, AMR-HR
14 AMR-FR FR, AMR-HR, HR
15 EFR FR, HR
Command syntax: AT+WVR= <out_coding_type>[,<in-coding_type>]
AT+WVR= [<out_coding_type>],<in-coding_type>
AT+WVR? +WDR: <out_coding_type>,<in-coding_type>
OK
Note: <out_coding_type> is related to outgoing calls; <in-coding_type> to incoming calls.
Command Possible responses
AT+WVR=1
Note: Configure voice type FR and EFR
for outgoing calls only
OK
Note: Bearer is configured for outgoing calls
AT+WVR=1,4
Note: Configure voice type FR and EFR
for outgoing calls and HR and EFR for
incoming calls
OK
Note: Bearer is configured for outgoing calls and
incoming calls
AT+WVR=,4
Note: Configure voice type HR and
EFR for incoming calls
OK
Note: Bearer is unchanged for outgoing calls and
configured for incoming calls
AT+WVR=6
Note: Syntax error
+CME ERROR: 3
Note: Syntax error
AT+WVR?
Note: Ask for the current values
+WVR: 1,1
OK
AT+WVR=? +WVR: (0,2,3),(0,2,3)
Note: If Half Rate is available
AT+WVR=? +WVR: (0,1),(0,1)
Note: If EFR available.
AT+WVR=? +WVR: (0),(0)
Note: If neither HR nor EFR is available
AT+WVR=? +WVR: (0-5,15),(0-5,15)
Note: If HR and EFR are available
AT+WVR=? +WVR:
(0,2,3,10,11,12,13,14),(0,2,3,10,11,12,13,14)
Note: If Half Rate and AMR are available
AT+WVR=? +WVR: (0,1,6,9,10,11,12,13),(0,1,6,9,10,11,12,13)
Note: If EFR and AMR are available
AT+WVR=? +WVR: (0,10,12,13),(0,10,12,13)
Note: If AMR is available
AT+WVR=? +WVR: (0-15),(0-15)
Note: If HR,EFR, and AMR are available