---
title: "Rhino TAS app: IM-SSF"
description: The IM-SSF application enables access to the existing CAMEL service environment from the IMS — so that IMS users can use services implemented on the IN.
image: https://www.metaswitch.com/hubfs/Charts-Diagrams/rhino-tas-app-im-ssf.png
---

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# Rhino TAS app: IM-SSF

### 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 Metaswitch.

The IM-SSF application enables access to the existing CAMEL service environment from the IMS — so that IMS users can use services implemented on the IN.

![rhino-tas-app-im-ssf](https://www.metaswitch.com/hs-fs/hubfs/Charts-Diagrams/rhino-tas-app-im-ssf.png?width=1265&name=rhino-tas-app-im-ssf.png)

One of the challenges operators have in introducing the IP Multimedia Subsystem (IMS) is the cost and risk of introducing something new into an existing network that already includes a vast array of revenue-generating services. Operators cannot afford the time or cost needed to re-platform their entire service portfolio when they introduce IMS, and certainly their IMS subscribers will not accept a reduction in the number and quality of services.

The IM-SSF application addresses this migration problem by allowing access to the existing CAMEL service environment from the IMS — so that IMS users can use services implemented on the IN.

Network Operator Benefits:

- IM-SSF helps reduce the cost and time-to-market for IMS roll-out.
- It enables customers to adopt IMS without reducing service choice, and provides a broader array of service for new subscribers, and provides the basis for retaining existing subscribers, attracting new subscribers, and defending ARPU.
- Stimulating migration to IMS enables more subscribers to take up new IMS based services – thus providing an opportunity for ARPU growth.

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