---
title: "Rhino TAS app: IP Centrex"
description: IP Centrex is a real-world example of cloud-based telecom service. It enables operators to provide the “SaaS” model many business customers want. Supporting “low-friction” sales direct from the web enables operators to reduce sales-costs and support the long-tail of small businesses to maximise revenues.
image: https://www.metaswitch.com/hubfs/Charts-Diagrams/rhino-tas-app-ip-centrex.png
---

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# Rhino TAS app: IP Centrex

### Topics

- [Mobile](https://www.metaswitch.com/knowledge-center/reference/topic/mobile),
- [Rhino TAS](https://www.metaswitch.com/knowledge-center/reference/topic/rhino-tas),
- [Rhino TAS apps](https://www.metaswitch.com/knowledge-center/reference/topic/rhino-tas-apps)

### Developed by a Rhino TAS customer.

IP Centrex is a real-world example of cloud-based telecom service. It enables operators to provide the “SaaS” model many business customers want. Supporting “low-friction” sales direct from the web enables operators to reduce sales-costs and support the long-tail of small businesses to maximise revenues. Using all IP communication provides a cost-saving for the enterprise customer and supports enterprise mobility.

![rhino-tas-app-ip-centrex](https://www.metaswitch.com/hs-fs/hubfs/Charts-Diagrams/rhino-tas-app-ip-centrex.png?width=1544&name=rhino-tas-app-ip-centrex.png)

This application enables operators to offer enterprise customers a cloud-based PBX solution that incorporates the cost-benefits of all IP communications.

As IP-Centrex is hosted by the network operator, it provides enterprises with PBX functionality without needing equipment to be installed on their premises, with opportunities to buy as a monthly subscription rather than as a capital investment. Offices on multiple sites can also all use the same ‘PBX’ – simplifying business communications.

`PBX functions may include: Call forwarding, call transfer, call pick-up, call hold, call screening, hunt groups, call distribution and call queuing, etc. Mobile phones may also be included in the Centrex call group to support enterprise-wide PBX mobility.

Several Rhino TAS operator customers have also integrated popular Unified Communications packages such as Microsoft Lync to provide pan-enterprise communications capabilities.

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