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Cross connected calls over MPLS WAN

psmith
Level 1
Level 1

‎07-06-2007 08:31 AM

Hi,

I have an issue with one of my offices that has me extremely puzzled.

When users call users in other offices, sometimes the calls get cross-connected, where they are suddenly talking to another caller.

Our telephony provider is insisting it is my network, but I have this office router and switches configured the same as our other 5 offices that don't have this issue.

They are now trying to say it is an MPLS issue from our Telco, but I figure I would be seeing issues with data going over that link as well.

Has anyone ever experience this "crosstalk" before?

The routers at the offices are 2811/2851, with 10meg MPLS WAN between, and 3560/3750 PoE switches for the phones.

Any advice or tips would be greatly appreciated!

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7 Replies 7

paolo bevilacqua
Hall of Fame
Hall of Fame

‎07-06-2007 08:38 AM

Unlikely is the transport. What IOS on the router,m which protocol are to CCM, and which version is it ?

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psmith
Level 1
Level 1
In response to paolo bevilacqua

‎07-06-2007 09:16 AM

The 2851 at our head office is running 12.3(8)T8.

The 2821 at the remote office is running 12.3(8)T8 as well.

We are not using CCM, we are using a Mitel VoIP solution (which I hate and wanted to go with Cisco instead!), which is using Minet (shows as RTP traffic).

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paolo bevilacqua
Hall of Fame
Hall of Fame
In response to psmith

‎07-06-2007 11:50 AM

And what you are using for phones ?

Because, if there is no cisco voice devices involved, I'm afraid you have to seek support from Mitel.

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psmith
Level 1
Level 1
In response to paolo bevilacqua

‎07-06-2007 01:13 PM

I already know it has to be a Mitel problem. But since the network is my responsibility (not voice), I wanted to try to rule out that it couldn't be my 'fault' it is happening.

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paolo bevilacqua
Hall of Fame
Hall of Fame
In response to psmith

‎07-06-2007 01:41 PM

No, do not worry. I think your cisco routers and switches are behaving well as they do most of the time.

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rgoodwin7399
Level 1
Level 1

‎03-17-2008 08:52 AM

Were you ever able to get this resolved? I have a similar issue at two branches that are using CCM. I think it is a router ios issue and was wondering if you ever got anywhere with it.

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russell.turner
Level 1
Level 1

‎06-22-2008 10:49 AM

I curious if you found a solution to this issue. I have Mitel voip network but I have not encountered this.

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