<b><font size="6">Thanks very much, I appreciate!</font></b><br><br><div class="gmail_quote">On Sat, May 31, 2008 at 10:36 PM, Eric Wieling <<a href="mailto:eric@fnords.org">eric@fnords.org</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
ulaw or alaw.<br>
<div class="Ih2E3d"><br>
Robor Oghene wrote:<br>
> Thanks for your response<br>
><br>
> *Which of the codecs supported on asterisk is best for GSM and CDMA phones<br>
> connecting over sip?*<br>
><br>
> On Fri, May 30, 2008 at 8:34 PM, Steve Underwood <<a href="mailto:steveu@coppice.org">steveu@coppice.org</a>> wrote:<br>
><br>
>> Julio Arruda wrote:<br>
>>> Steve Underwood wrote:<br>
>>><br>
>>>> Robor Oghene wrote:<br>
>>>><br>
>>>>> Hi,<br>
>>>>><br>
>>>>> Do CDMA phones use the gsm codec?<br>
>>>>><br>
>>>> Even GSM phones rarely use the GSM 06.10 codec that is in Asterisk these<br>
>>>> days. CDMA never did.<br>
>>>><br>
>>> Isn't AMR supposed to be the codec used in GSM nowadays ? I remember<br>
>>> seeing something like this in Nortel PVG/Packet Trunking for GSM,<br>
>>> AMR/AMR-HR or something like that.<br>
>>><br>
>> AMR can be used with 2G GSM, but is most commonly used with 3G UMTS<br>
>> (along with AMR-WB, the wide band version). The commonest codecs for GSM<br>
>> are the EFR (enhanced full rate) and HR (half rate) codecs.<br>
<br>
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