You work as a Voice Technologies Administrator at PassGuide.com. Your job is to manage and troubleshoot the problems related with the VoIP network of your company. Your company is using digital voice connection to a PSTN as T1 circuit. Which of the following are the methods to send T1 frames in CAS?

Each correct answer represents a complete solution. Choose two.

A.
SIP (Session Initiation Protocol)

B.
SCCP (Skinny Client Control Protocol)

C.
ESF (Extended Super Frame)

D.
SF (Super frame)