Authors:
C. W. Cheng
1
and
C. G. Chung
2
Affiliations:
1
National Chiao Tung University, Taiwan
;
2
Chang Gung University, Taiwan
Keyword(s):
Number portability, PBX, cache policy.
Related
Ontology
Subjects/Areas/Topics:
Mobile Software and Services
;
Telecommunication Software Systems, Tools and Languages
;
Telecommunications
;
Wireless Information Networks and Systems
Abstract:
Number portability (NP) service has become an important factor in enhancing the competitiveness of a service provider. Although NP service is available now, NP database (NPDB) query and portable number translation are
all-call-based, and the time required to process a NP call is long. It is an overhead to the operator and the user. How to reduce the impact of NP call process is an important issue. Considering an organization often has dialled number locality, we suggest applying caches to PBX to keep the routing information of portable numbers. In this paper, the interoperation of PBX and operator network is introduced. We also demonstrate the workload of portable number translation is shared out to PBX, the delay time of querying routing information is shorten, and the efficiency of NP call process is enhanced.