HLR Backup/HLR Redundancy

User Feature	Description (See also the description for HOME LOCATION REGISTER REDUNDANCY)
Definition	HLR backup/HLR Redundancy is a feature which means that IP extensions can, on certain conditions, register to a backup Home Location Register in another server than the ordinary HLR.
Settings	Normally none, but the service can be turned off by the system administrator. Default is that the service is not active.
Procedure and function	HLR backup/HLR Redundancy is available to IP terminals, that is, H.323 and SIP telephones/clients, and means that when an arbitrary Server (LIM) with HLRs 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 can be created and the extension can be registered to that backup HLR. When the ordinary HLR recovers, it is possible to re-register to that HLR. This is however not done immediately, but with a delay. Note that several services, like group functions and queue functions, are lost while registered to a backup HLR. There is no specific user procedure. See also Redundancy, server and network.

User Feature

Description

(See also the description for HOME LOCATION REGISTER REDUNDANCY)

Definition

HLR backup/HLR Redundancy is a feature which means that IP extensions can, on certain conditions, register to a backup Home Location Register in another server than the ordinary HLR.

Settings

Normally none, but the service can be turned off by the system administrator. Default is that the service is not active.

Procedure and function

HLR backup/HLR Redundancy is available to IP terminals, that is, H.323 and SIP telephones/clients, and means that when an arbitrary Server (LIM) with HLRs 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 can be created and the extension can be registered to that backup HLR.

When the ordinary HLR recovers, it is possible to re-register to that HLR. This is however not done immediately, but with a delay.

Note that several services, like group functions and queue functions, are lost while registered to a backup HLR.

There is no specific user procedure.

See also Redundancy, server and network.

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