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Hi,<BR>
<BR>
Did you try bypassing the firewall and directly connect it to the switch where CCM is in there ? Another question is; Did you take your 7912 IP Phone to the cable that is used for another working Cisco IP Phone model ?<BR>
<BR>
Regards,<BR>
<BR>
Ahmet Can KETEN<BR> <BR>
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Date: Tue, 14 Jul 2009 17:27:47 -0500<BR>From: victor.rodriguez@neoris.com<BR>To: cisco-voip@puck.nether.net<BR>Subject: [cisco-voip] 7912 problem with Firewall Between them and Call Manager<BR><BR>
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<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt" lang=ES-MX>Hi, all</SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt" lang=ES-MX> </SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">I have a problem with ip phone 7912, when i make a phone call the ipphone ring once and then lose contact with the Callmanager and goes to CCM fallback, I have others models and works them properly, the cisco TAC told me that the firewall is dropping packets because those are fragmented they suggest to upgrade the version of my firewall, but is FWSM and I have several contest that could be affected.</SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"> </SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">I upgrade the firmware for the ip phone to the last and I have the same behavior, do you know how to change the phone parameters to avoid send fragmented packets?</SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"> </SPAN></FONT></P>
<P class=EC_MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Best Regards</SPAN></FONT></P></DIV>
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