Interface with a Call Manager
ICE Gateway has two primary modes of operation that determines how it interacts with the call manager:
1. By treating the call manager as a SIP registrar, and registering ICE users and ICE channels (with dial-in enabled) with the call manager. In this mode, ICE appears to the telephone system as if it were a group of desk phones or similar endpoints.
2. By establishing a SIP trunk with the call manager. In this mode, ICE Gateway appears as an auxiliary telephony system intended to handle calls terminating on a defined set of dial peers.
Which mode you choose typically depends on the capabilities of your call manager. When both modes are supported, SIP trunk mode should be preferred as it offers a more efficient signaling path.