System and method for realizing wide-area centrex
Patent Information
- Authority / Receiving Office
- CN Β· China
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Publication Date
- 2007-06-20
- Estimated Expiration
- Not applicable Β· inactive patent
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Abstract
Description
technical field
[0001] The invention relates to the field of communication technology, in particular to a system and method for realizing a wide-area Centrex by using a smart home location register (SHLR). Background technique
[0002] Generally speaking, the concept of a Centrex group only exists in the intra-office. If intra-office users belong to the same Centrex group, they can dial short numbers to achieve intercommunication. If a Centrex group consists of users from different exchanges, a wide-area Centrex (WAC) group is formed. This makes the Centrex group users no geographical restrictions, and users of the same Centrex group in different offices can communicate with each other through the Centrex short number. It provides convenience for users such as institutions, groups, factories and mines with scattered office locations.
[0003] Currently, there are generally two ways to implement WAN Centrex: one is to convert short numbers into called long numbers by configu...