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<TITLE>Re: [cisco-voip] 3825 Voice Gateway Issue</TITLE>
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<DIV id=idOWAReplyText51975 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>There is no audio in either
direction? There are no ACL's in place?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>1. What IOS version?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>2. What phone Load?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Can you put a switch right off one of the
GigEthernet Drops on the router and attach your phone to that thus alleviate the
entire network.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> cisco-voip-bounces@puck.nether.net on
behalf of David Fielder (US)<BR><B>Sent:</B> Mon 10/16/2006 4:23
PM<BR><B>To:</B> Ryan Ratliff<BR><B>Cc:</B>
cisco-voip@puck.nether.net<BR><B>Subject:</B> Re: [cisco-voip] 3825 Voice
Gateway Issue<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>I will see about getting a capture. I have not done any PCM
dumps<BR><BR>David Fielder<BR>Senior Engineer<BR>Dimension Data<BR>Office: (336)
510-9431<BR>Mobile: (336)
669-5129<BR>david.fielder@us.didata.com<BR><BR>-----Original
Message-----<BR>From: Ryan Ratliff [<A
href="mailto:rratliff@cisco.com">mailto:rratliff@cisco.com</A>]<BR>Sent: Monday,
October 16, 2006 3:17 PM<BR>To: David Fielder (US)<BR>Cc:
cisco-voip@puck.nether.net<BR>Subject: Re: [cisco-voip] 3825 Voice Gateway
Issue<BR><BR>Can you get a sniffer capture at the phone and recreate the audio
in <BR>the capture file?<BR><BR>Have you done PCM dumps at the router
yet?<BR><BR>-Ryan<BR><BR>On Oct 16, 2006, at 3:09 PM, David Fielder ((US))
wrote:<BR><BR>I have a very interesting issue at a client I am working with. We
are <BR>converting this customer from a Nortel to CallManager. This
customer <BR>is using IP phones already. There are four locations that
are <BR>converting to IP phones. All four locations will be using a
single <BR>3825 voice gateway to the PSTN. We connected the phones at
one <BR>location and configured the gateway as an MGCP gateway. We have
two <BR>Bellsouth ISDN PRIs connected to the gateway that came out of
the <BR>Nortel. The ISDN connections come up with no problem. We
have <BR>verified the Frame type with the Bellsouth and the PRI are
working <BR>fine. The phones are using PoE and are getting the IP address
via <BR>DHCP and are using a voice VLAN. The PCs are connected to the
access <BR>port on the phones. The Phones register to the Subscriber just
fine. <BR>Calls are being routed to the Gateway with no problem. Inbound
calls <BR>make it to the IP phones fine. So you are asking then what
the <BR>problem is. There is no audio on the call or ring back. The call
sets <BR>up fine. The ISDN debugs show no errors. The phone maintains
the <BR>connection until you hang up. And if you look at the RTP and
UDP <BR>debugs it is sending and receiving the RTP traffic without issues
or <BR>appears to be. You can start an ISDN Q931 debug and make a call.
When <BR>the call is connected look at the traffic info on the phone
and <BR>everything appears as it should accept there is no audio, static
or <BR>anything. We have made calls from different phones, phone
types <BR>(7961, 7912, and IP Communicator) with the same result.
IP <BR>connectivity is good. There are no IP routing issues. We upgraded
the <BR>IOS on the Gateway. We caused the phones to go into SRST mode
to <BR>remove the CallManager from the equation and it was the same
result. <BR>Cisco to Cisco calls work great. This one has TAC scratching
there <BR>head. If anyone has ever seen a problem like this or have any
other <BR>suggestions I would really appreciate your
input.<BR><BR><BR><BR>David Fielder<BR><BR>Senior Engineer<BR><BR>Dimension
Data<BR><BR>Office: (336) 510-9431<BR><BR>Mobile: (336)
669-5129<BR><BR>david.fielder@us.didata.com<BR><BR><BR><BR><BR><BR>Disclaimer:
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