What Q.931 message cannot be received in response to sending a Q.931 SETUP message?
A.
Progress
B.
USER Information
C.
Call Proceeding
D.
Alerting
E.
Connect
What Q.931 message cannot be received in response to sending a Q.931 SETUP message?
What Q.931 message cannot be received in response to sending a Q.931 SETUP message?
A.
Progress
B.
USER Information
C.
Call Proceeding
D.
Alerting
E.
Connect