On Wed, 14 Jan 2009, Ralf Träskman wrote:

Hi

Yes we use voip as external.

If the asterisk box is behind NAT itself, then you need to port-forward ports 5060 and 10000-20000 on the firewall to the asterisk box. Then you need to make sure that localnet= and externip= are set correctly in sip.conf.

Gordon



/ralf

-----Original Message-----
From: asterisk-users-boun...@lists.digium.com 
[mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Gordon Henderson
Sent: den 14 januari 2009 10:46
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] gxp2000 and no sound asterisk 1.6

On Wed, 14 Jan 2009, Ralf Träskman wrote:

Hi

I have a grandstream gxp-2000 and trying it on an asterisk 1.6.

When I call internally between extensions I can hear the other person
in the gxp2000, but when I call externally from the gxp I can't hear
the person on the other end, but he can hear me.

How do you configure the grandstream 2000 to work on asterisk 1.6?

First, upgrade your asterisk to 1.2 ... ;-)

What is the external connection? Is it VoIP, PSTN, or ... ?

If it's VoIP then it's almost certian to be a NAT problem with your 
network/router.

There's no magic in setting up GXP2000's - they're fairly straightforward, and 
if you can do phone to phone, (via an asterisk) they're probably OK.

Let us know more about the external connection technology...

Gordon

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