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<TITLE>[cisco-voip] problem for Cisco 7912 ip phone behind pix firewall</TITLE>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>sounds like maybe a fixup
protocol on the pix?</FONT></DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> cisco-voip-bounces@puck.nether.net on
behalf of sekchye goh<BR><B>Sent:</B> Thu 12/23/2004 8:22 PM<BR><B>To:</B>
cisco-voip@puck.nether.net<BR><B>Subject:</B> [cisco-voip] problem for Cisco
7912 ip phone behind pix firewall<BR></FONT><BR></DIV>
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<P><FONT size=2>Hi there!<BR><BR> We have two cisco 7912 ip phone
using SIP firmware behind PIX<BR>firewall. These two phone is configured
to register to a SIP proxy on<BR>the public Internet. This SIP proxy is
using SER<BR>(<A
href="http://www.iptel.org/ser/">http://www.iptel.org/ser/</A>). These two
Cisco 7912 ip phones are PAT<BR>to a single IP.<BR><BR> The problem
we have is when these two phones call each other, the<BR>two party cannot hear
each other voice.<BR><BR> If we replace the PIX firewall with a
Cisco router, there is no such problem.<BR><BR> Does anyone encounter this
problem before? I am clueless on how to<BR>resolve this problem. Any
pointers will be much appreciated.<BR><BR> Thank you very
much!<BR><BR>Best
regards<BR><BR>sekchye<BR>_______________________________________________<BR>cisco-voip
mailing list<BR>cisco-voip@puck.nether.net<BR><A
href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</A><BR></FONT></P></DIV>
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