I have a problem that myself and the Telco company are unable to resolve.
I'm having problems with a new Internal IP voice connection across our international WAN supported by an external telco provider.
We have a gatekeeper at the central site which talks IP to the local PE routers at the local sites (Multiple VRF MPLS Network). This then talks Q931 via a back to back ISDN link between the PE and a local site Voice gateway that is then linked via MGCP to call Manager.
We are unable to make calls across the q931 link as they keep dropping with a cause code of 0x82AA. We have debug this but cannot work out where in the chain this is failing and there doesn't seem to be any useful information on this cause code that helps point us in the right direction.
ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8006
Cause i = 0x82AA - Switching equipment congestion
Can someone help shed some light into some area's that could generate this message. Would it be the q931 back to back connection, the upstream IP connectivity to gatekeeper that sends this message back.
A debug of h225 ASN1 on the PE router just shows gatekeeper registrations and not the call.
The error message indicates the destination cannot be reached because the network switching equipment is temporarily overloaded. This cause indicates that the switching equipment generating this cause is experiencing a period of high traffic.
Please send the output of the following commands:
show controllers t1