Media Ressource Function

The CreaLog MRF is a powerful multimedia server in the IP Multimedia Subsystem (IMS) architecture. With it, service providers can quickly deploy multimedia services across fixed and mobile networks.

Within an Intelligent Network (IN), the Media Server and Special Resource Function play announcements, record user input and collect DTMF entries from the caller. Media Servers are part of the IMS architecture for:

  • Ring back tones
  • Tones to alert users e.g. when their mobile plan allowance is exceeded during a call
  • Tariff announcements, opening hours and network related information
  • Collecting DTMF input from users

There are two ways to generate input for the announcements: One way is to upload prompts (sound files), the other is to use Text-to-Speech resources, which generate speech output from typed text. 
The CreaLog Media Servers and SRF can collect user input via DTMF or speech recognition and support all relevant standards including SIP, MSML and HD-Voice.

For more information download the CreaLog Telco Catalog.



  • Enable efficient expansions and the delivery of multiple services
  • Platform must interact with several services simultaneously
  • Deliver high-availability, carrier-grade services
  • Support for NETANN, MSCML, MSML, AMSML, VxML and other major interfaces


  • Deployment of multimedia services across fixed and mobile networks with reduces costs and time to market
  • Leverages IMS infrastructure with interfaces for IMS and fixed NGN
  • Allows any access method: 2G GSM/CDMA, 3G UMTS/CDMA, 4G LTE, 5G
  • Supports a large variety of audio and video CODECs; uses no DSPs


General requests
+49 89 324 656-0
Service Hotline (24/7)
+49 89 324 656-10


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