Introduction

This is a description of the HLR Redundancy feature in the MX-ONE Service Node. The feature is available to IP terminals, that is, SIP and H.323 phones or clients. Cordless DECT extensions, that is, CXN, TDM DECT, support this feature. If an arbitrary server (LIM) fails or becomes unavailable, these extension types can register or re-register in any server (LIM) in operation in the same system. In other words, a backup HLR will be created, and the extension can be registered to that backup HLR.

When the ordinary HLR recovers, it is also possible to re-register to this HLR. This is however not done immediately, but with a delay. Location registration to any location area in an operating LIM is needed to recover full operation.

There is one general system license for HLR Redundancy feature. The HLR Redundancy feature is sort of an alternative to the Server Redundancy feature. If you are using Server Redundancy, there is no reason to activate the HLR Redundancy feature, in fact it is recommended not to activate it.