RESOLVED: 50% of inbound calls fail: Congestion?

This is what the CDR shows when a call fails:

2016-05-02 11:47:17 1462207637.88 7607127490 Congestion s [from-sip-external] ANSWERED 00:08

I have an inbound route that matches all incoming calls and sends them to an IVR, I’m not sure what else to check.

Any tips for troubleshooting this one?

Already tried rebooting…

Thanks

BTW a successful call looks like this:
2016-05-02 11:47:30 1462207650.89 7607127490 2194007200 BackGround s [ivr-2] ANSWERED 00:09

Hmmmm while writing this, I noticed that the failed calls have no called number attached to them! I think I’m onto something. I will call BroadVoice

UPDATE: RESOLVED

BroadVoice had a server upgrade and one of the old servers was still being load balanced for incoming calls, once they removed that old server now calls are working 100%