Hi,
I've had a bit of a
problem with one way audio, and it happens exactly when I believe it shouldn't
(and works perfectly when I would guess I could have issues.
Setup:
GrandStream
GXP2000-------Linksys Router-----------Internet------Asterisk box (hosted
somewhere, fixed IP, no NAT) ----------- VoIP provider
-------PSTN
When a call comes in
from the PSTN, the call goes all the way to my desk phone (the GXP2000) and it
rings. Audio is clear, both ways.
When a call is made
from my GXP2000 phone to a PSTN phone (I use my cell and my home phone as
benchmark, they both get the same result) then I get no audio at all. but
ti does rin on the PSTN phone.
I've tried rerouting
ALL of the relevant ports on my Linksys router directly to my VoIP phone (5060
for SIP, 5004 for local RTP on the phone, 10000-20000 as the Asterisk RTP
ports)....Nothing works.
What ports am I
missing? Could the problem be entirely something else? Somehow I had
the feelings that calls going out (since they originate from the device behind
the NAT) would not be a problem, but calls coming in could
be.
I really would
appreciate a hint from somebody who knows better than I do (i.e.
anybody)
Mike
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