The benefits of having the Unified Communications Gateway (UCG) are:
- Security assurance.
- The UCG provides a single point of entry in and out of the network for video calls.
- Video endpoints are protected from external unsolicited malicious calls like H323/SIP brute force calls or denial-of-service attack and toll fraud attempts.
- topology hiding means that externals only see information about the public interface of the SBC and not the endpoints.