h1. HLR cache

*HLR cache* - locally stored table with mapping of MSISDN to:

* MCC
* MNC
* IMSI

!hlr_registry.gif!

This table could be imported/exported manually.
Also it's automatically filled on responses from HLR providers for [[HLR information]] dipping from Smartswitch.

*time* - time when this record has been added or updated.
Automatic deletion of obsolete entries in HLR cache could be configured.
In this case *time* field will be used to determine, is the record obsolete or not.

To this table *Smartswitch* refers mainly to perform [[Transformation of E.164 number to MCC-MNC code]].
In case if MSISDN has been found in this table - further MCC-MNC lookup is stopped.

[[HLR кэш|Русский перевод]]