[Asterisk-Users] ZAP <--> sip(polycom301) can not hear each other

[Noah Miller]

Hi - 

> That is correct, The SIP phones are all on our  LAN. I changed the nat's to
> say no, but I still get the same problem.  Another thing, when I call out to
> the pstn from our local sip phones.  The same problem happens.  The outid line
> rings, the person picks  p but no sounds.
>   
>    Any suggestions????

I've been away from the list and just saw your thread now.  Although, I
don't see the normal CLI errors, you problem is probably this:

>> disallow=all
>> allow=all

You are trying to use all possible codecs that asterisk knows.  The polycom
phones only know ulaw, alaw and g729.  Try this instead:

disallow=all
allow=ulaw


- Noah