Firmware version: R7.46
R18.104.22.168108091301.Q2686G 2216044 080911 13:01
I am engaged with a telecommunication system’s project on which showing current bearer voice info of GSM network is required, I mean something like AMR, EFR, FR, …
I googled on current Sierra Wireless modules (AT command list, actually) but didn’t get anything that looked promising:
There is just AT+WVR? to show our requested voice rate list, not showing the exact current one, for example:
AT+WVR = 7, 7
That is not my issue! I want to know what current voice rate is, for example: EFR or AMR-FR, not a list of them which were set before.
However, I’ve found a similar topic in TELIT modules, as AT#CODECINFO, which shows me the used codec as well as set codec by an unsolicited report only if the codec changes.
I wonder if it is possible to show vocoder info on Q2686H module’s family (maybe with a different version of firmware, or a special ordered version).
In addition, I am not sure about the exact different functionalities between Preferred type and Other supported types.
For instance, if our GSM network supports both of AMR-FR and AMR-HR, does the AT+WVR = 12, 12 mean Bearer Voice Rate is AMR-FR (preferred type) and not AMR-HR (other supported type) in any circumstances?
If not, I wonder if it would be possible to set Bearer Voice Rate on just one of them, e.g. AMR-FR without any other supported types, like EFR or AMR-HR.
Looking forward to hearing from you,
 Table 21.12.3. Parameters and Defined Values of Sierra Wireless Voice Rate +WVR, AT Command Interface Guide for firmware 7.46 p. 59