[Serusers] problem for Cisco 7912 ip phone behind pix firewall

[Pepe]

PIX firewalls cant reroute using the same interface, dunno if it helps but
is one difference with routers....


----- Original Message -----
From: "sekchye goh" <sekchye at gmail.com>
To: <serusers at lists.iptel.org>
Sent: Monday, December 27, 2004 4:54 AM
Subject: [Serusers] problem for Cisco 7912 ip phone behind pix firewall


> Hi there!
>
>   We have two cisco 7912 ip phone using SIP firmware behind Cisco PIX
> firewall.  These two phone is configured to register to a SER proxy which
is on
> the public Internet.   These two Cisco 7912 ip phones are PATor NAPT
> to a single IP.
>
>   The problem we have is when these two phones call each other, the
> two party cannot hear each other's voice.
>
>   If we replace the PIX firewall with a Cisco router, there is no such
problem.
>
>  Does anyone encounter this problem before?  I am clueless on how to
> resolve this problem.  Any pointers will be much appreciated.
>
>   Thank you very much!
>
> Best regards
>
> sekchye
>
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