Which statement is true regarding SCCP?
A.
SCCP supports the widest range of features on Cisco IP phones.
B.
SCCP requires a registrar server.
C.
The protocol is proprietary to Cisco.
D.
Only the IP address is required for the gateway to communicate with Cisco Unified
Communications Manager.
E.
A PRI backhaul connection forwards PRI Layer 3 (Q.931) signaling information via a TCP
connection from the gateway to the call agent.