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No call features when switched to MPLS link

No call features when switched to MPLS link

(OP)
I have 2 Avaya IP Office 406's on my network both are out of the box configurations. My network is MPLS with VPN backup connection.
The problem is when I point my PBX's to the MPLS link and have it put in the RT class, I lose the call features (caller ID, voicemail, etc..) but the voice still works.
If I put it in the D1 class it works correctly or if I point it to the vpn connection it works correctly.
I think the issue is the marking on the traffic between the PBX's and the routers (Cisco 2810) do not know how the traffic should be marked and remarked when handed back to the PBX.
Any and all thoughts will be appreciated.

Happy Holidays
Kline
  

RE: No call features when switched to MPLS link

Hrmmm.. I can't imagine the reamapping to another close or connection you would lose just the features. I would have thought it wouldn't have worked at all.

On the MPLS connection
Are you paying for multiple CoS?
Did you define to the carrier how you would mark or they interept your traffic comming into the edge?

I need a little more detail on the MPLS to maybe point in some direction.  

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