Home Location Register (HLR) Redundancy

The Home Location Register (HLR) Redundancy is designed for customers that are deploying IP/SIP phones and have more than one server with load balancing enabled to share the load between servers. The user data is synchronized between the servers. Should one of the servers fail, the IP/SIP phones will re-register to one of the secondary servers (using a guest HLR) automatically and recover most of their features. When the primary server comes back, they will re-register to their primary HLR server.

HLR redundancy feature is intended for customers that do NOT use server redundancy (N+1 or 1+1), but still want a redundancy function for the SIP/IP phones (possibility to log in in another server).

Each server in an HLR redundancy setup can handle up to 15,000 HLR (registered phones) or guest HLR (“visitors”) IP/SIP end-points.