[Asterisk-Users] port forwarding ip to ip sip calls

[Ashish Raikwar]

hi
but i don't think IAX2 is good, because with IAX2 RTP packets goes via IAX
servers as mini packets  not directly from one client to other client so for
a big implementation it may consume more  bandwith then that of a SIP
solution
rest is up to the user...
----- Original Message -----
From: "Wilson Pickett" <spamsucks2005 at gmail.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Sent: Tuesday, August 02, 2005 11:07 PM
Subject: Re: [Asterisk-Users] port forwarding ip to ip sip calls


> I've got two pa1688 phones that I want to set up to communicate between
> branch offices without a gatekeeper. Both phones will be behind a
> firewall and I want to use port forwarding so the phones can communicate.

Are you using these phones with SIP? Why not try IAX2?

> I tested the phones behind a firewall on the same network segment and
> there were no problems at all using sip. However, I then moved the
> phones into  situ and port forwarded udp on 5060 and 10000 - 20000 at
> both branch offices firewalls. I set the rcp port to 10000 and the sip
> port to 5060. The phones were able to ring each other, however, there
> was no sound on both ends.
>
> Can some one please tell me which ports I have to open in order to make
> communications between the two branch offices using these phones. Or
> share a config or suggest another protocol so I can make this happen.

Check for nat=yes and canreinvite=no in sip.conf
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