[asterisk-users] Grandstream phones

[Gerwin van de Steeg]

John,

- Make sure you are using the correct codecs, and other SIP settings 
(ports, dtmf, and the like)
- Receive a call, then when you have no audio, press any key on the 
device.  This should restore audio if you are using firmware 1.1.1.14 or 
lower. (Known issue)

JNA wrote:
> I got some Grandstream Gxp2000 v.2 phones and I can get them to make and
> receive calls but there is no audio? My softphone work fine using the same
> accounts. Anyone have any idea what could be wrong by just switching in a
> hard phone vs. softphone?
>
> Thanks,
> John
>
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