<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">On the router, during a call is active, is the IP address under 'show call active voice brief' reachable from the MGCP interface on the router that MGCP is bound to and vice versa? Does that output show tx/rx traffic counts incrementing? With MGCP all the information may not be displayed for that command, but the IP address and tx/rx counts will be there. <br><br>Also check the phones web page during an active connected phone call, the stream page and see what IP's it is showing for the stream and verify reachibility of the path from phone to the remote device (the gateway in this case).<br><br>Also, from the config , mgcp bind commands are set for the gigabit ethernet but loopback has description on it as being MGCP interface.
May not be a issue since you are troubleshooting this issue, etc and probably made changes while figuring this out but just in case you have routing/ACLs/etc set up for that and not the other interfaces, etc.<br><br>May want to do a 'debug mgcp pack' during call setup to see if setup/audio-cutover is correct and all packets are making it to gateway, etc. Are there any routing, firewalls, or QoS policies that may be effecting the call flow past this gateway? There are no drops on the QoS policies?<br><br>The 'service mgcpapp' commands are not needed on the pots dial-peers for PRI ports. In older cisco docs this was the practice but then there was a bug id on how that effected MGCP PRI backhauls and caused problems so now they say do not put that command on pots dial-peers for PRI ports. There are some conflicting docs out there on this still.<br><br>Is this the only site having this issue, other sites working fine if there are others? What version CCM and phone
firmwares?<br><br>What did you upgrade the IOS to? I see the config posted is 12.3(14)T5 but the current in that stream is 12.3(14)T7.<br><br>-- Erick<br><br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ----<br>From: David Fielder (US) <David.Fielder@us.didata.com><br>To: nikola@att.net<br>Cc: cisco-voip@puck.nether.net<br>Sent: Monday, October 16, 2006 4:58:19 PM<br>Subject: Re: [cisco-voip] 3825 Voice Gateway Issue<br><br><title>Re: [cisco-voip] 3825 Voice Gateway Issue</title>
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<p class="MsoNormal"><em><i><font color="navy" face="Courier New" size="2"><span style="font-size: 10pt; font-family: "Courier New"; color: navy;">David Fielder</span></font></i></em><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="navy" face="Courier New" size="2"><span style="font-size: 10pt; font-family: "Courier New"; color: navy;">Senior Engineer</span></font><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="navy" face="Courier New" size="2"><span style="font-size: 10pt; font-family: "Courier New"; color: navy;">Dimension Data</span></font><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="navy" face="Courier New" size="2"><span style="font-size: 10pt; font-family: "Courier New"; color: navy;">Office: (336)
510-9431</span></font><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="navy" face="Courier New" size="2"><span style="font-size: 10pt; font-family: "Courier New"; color: navy;">Mobile: (336)
669-5129</span></font><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"><a rel="nofollow" target="_blank" href="mailto:david.fielder@us.didata.com">david.fielder@us.didata.com</a></span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> Nikola Stojsin
[mailto:nikola@worldnet.att.net] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Monday, October 16, 2006
5:45 PM<br>
<b><span style="font-weight: bold;">To:</span></b> David Fielder (US)<br>
<b><span style="font-weight: bold;">Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style="font-weight: bold;">Subject:</span></b> RE: [cisco-voip] 3825
Voice Gateway Issue</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Two quick questions -</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">1. Can you please verify that the PVDM-2s
in the 3825 work fine? (I remember seeing something similar on a router with a
PVDM issue.)</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">2. Can you post your router configuration
– it would definitely help.</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">HTH, </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Nikola</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">---------------------------<br>
Nikola Stojsin<br>
PhD CCIE #12888<br>
<a rel="nofollow" target="_blank" href="mailto:Nikola@att.net">Nikola@att.net</a><br>
(917) 558-1423<br>
---------------------------</span></font></p>
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<p class="MsoNormal" style="margin-bottom: 12pt;"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
cisco-voip-bounces@puck.nether.net on behalf of David Fielder (US)<br>
<b><span style="font-weight: bold;">Sent:</span></b> Mon 10/16/2006 4:23 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Ryan Ratliff<br>
<b><span style="font-weight: bold;">Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [cisco-voip] 3825
Voice Gateway Issue</span></font></p>
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<div>
<p><font face="Times New Roman" size="2"><span style="font-size: 10pt;">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 rel="nofollow" target="_blank" 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>
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