Is this card supported in a 2921 series (IOS Ver 15.0 M5) ?
Having issue to where you call a DID and get 30 seconds of dead air and then busy tone.
Verizon gets good wink signals and can process calls with test equipment at DMARC.
I have a cable guy coming out to verify connections, but this was working 100% in an Avaya before swinging to Cisco gateway.
They are configured as H323 trunks. I would normally think if this card is not supported, I would have trouble programming it due to errors, but not the case.