Definition - What does Session Controller (SC) mean?
Session controller (SC) is a real-time network application that uses Layer 5 routing for voice over Internet Protocol (VoIP) connectivity. SC adheres to the following standard requirements the Session Initiation Protocol and H.323.
Techopedia explains Session Controller (SC)
A session controller manages the following functions:
Call signaling and control
SIP and H.323 endpoint and interconnectivity
Quality of service