How IP Centrex works ?

• Centrex numbers provisioning is done in IP Centrex server, IMS Core and EWSD/5ESS switches.
• Landline customer in a centrex group can dial Short Code (with 3 to 5 digits) to contact other centrex numbers directly.
• A special access code for Centrex mobile subscriber is 1286.
• Mobile customer should prefix 1286 + Short Code (3 to 5 digits) for calling others in the same group.
• If a BSNL mobile subscriber roams to other operator’s network, he can’t use the Centrex service.

Features of IP Centrex :

• All India IP Centrex allows small and medium size enterprises to deploy PABX/ CUG service without really installing system physically in their premises.
• IP Centrex has no limitation of Zone/Circle. It is PAN India Service.
• A customer can have a PAN India IP Centrex i.e. numbers anywhere in the country can be brought into a single Centrex group. Each member of the group can access the other by dialing a short code.
• An IP Centrex group can have LL and BSNL mobile numbers (Prepaid & Postpaid). Landline phones of NGN, EWSD & 5ESS exchanges only.
• Number Presentation/CLIP of intra-CENTREX call is the short number.

IP Centrex Group Categories :

• Within SDCA
• Within SSA
• Within Circle
• Within Zone
• Across the Zones
• Customer Numbers Within Group may be from Different Zones and from different Services like LL,GSM

IP Centrex Dialing Method

An  Landline   Customer will dial short code to access the LL/Mobile number of the same group. Mobile Customer will dial 1286 +Short code to access the LL /Mobile number of the same Group.

IP Centrex Specification :

• Rental for Centrex will be based on number of connections within the group and category of Centrex
• There will be possibility of change of Category.
• IP Centrex will be offered on fixed rental basis to the customers
• Subscriber will not be charged for per call (both local &STD) within Centrex
• IP Centex services will be provided to both Postpaid and Prepaid subscribers
• Plan/rental would be applied on individual subscriber.
• Even if some of subscriber moves out of group , the slab will not change.
• There will not be any GP1&GP2 for IP Centrex services.

How to Get IP Centrex? :

• Customer can send the request for IP Centrex through SMS/E-mail/Call Centre.
• Customer can also approach the CSC / EB section.