SIP Registrar for Registered users
Software key for enabling 50 SIP registrations on E-SBC. This is needed to support remote worker and NAT Traversal and Survivability (for IP-Centrex, Remote Branch Office and Disaster Recovery) during WAN failure. Maximal capacity is 200 users (ver. 6.4). Valid in combination with existing/new E-SBC license only. Can be ordered in multiple quantities up to the maximal described capacity.