Reverse IM-SSF

Reverse IM-SSF enables the existing legacy subscriber base to access the new IMS application-server hosted services.

  • Status
  • Deployed
  • End-users the application is for
  • Network Internal
Reverse IM-SSF

The roll-out of IMS introduces a new service layer specific to that technology which promises to enable a wealth of new applications.  The primary function of Reverse IM-SSF is to do protocol conversion between IN and IMS — so that IN users can use services which are implemented on the IMS.

Although  Reverse IM-SSF is not specified in the IMS architecture (whereas IM-SSF is specified), Reverse IM-SSF is equally attractive, as it means that the existing legacy subscriber base — hugely in the majority and likely to remain so for a considerable time — can access the new IMS  application server-hosted services.  In this way, the operator can maximise the return on the IMS investment.

Network Operator Benefit:

  • Reverse IM-SSF enables operators to leverage their investment in IMS applications to stimulate revenue from their legacy (non-IMS) subscriber base.
  • Offering legacy customers a rich variety of IMS services can also help with the retention of existing subscribers and the acquisition of new customers.