[asterisk-users] CDMA Phones

[Andrew Joakimsen]

ulaw... it would be as if they were calling themselves over the PSTN.
Not ideal but it works. don't try something like g723!

On Sat, May 31, 2008 at 2:53 PM, Robor Oghene <oghenerobor at gmail.com> 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.
>>
>> Steve
>>
>>
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