[asterisk-users] CDMA Phones

[Eric Wieling]

ulaw or alaw.

Robor Oghene wrote:
> Thanks for your response
> 
> *Which of the codecs supported on asterisk is best for GSM and CDMA phones
> connecting over sip?*
> 
> On Fri, May 30, 2008 at 8:34 PM, Steve Underwood <steveu at coppice.org> wrote:
> 
>> Julio Arruda wrote:
>>> Steve Underwood wrote:
>>>
>>>> Robor Oghene wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Do CDMA phones use the gsm codec?
>>>>>
>>>> Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these
>>>> days. CDMA never did.
>>>>
>>> Isn't AMR supposed to be the codec used in GSM nowadays ? I remember
>>> seeing something like this in Nortel PVG/Packet Trunking for GSM,
>>> AMR/AMR-HR or something like that.
>>>
>> AMR can be used with 2G GSM, but is most commonly used with 3G UMTS
>> (along with AMR-WB, the wide band version). The commonest codecs for GSM
>> are the EFR (enhanced full rate) and HR (half rate) codecs.

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