Mediation Server Role Lync


  • translating SIP over TCP to SIP over mutual TLS
  • encryption and decryption of SRTP traffic
  • translation of media (G.711) on the gateway to RT Audio on CS
  • Connecting external clients to internal ICE for media traversal of NAT, firewalls, ...
  • Intermediary system for call flows not supported by a gateway (eg. remote worker calls on an enterprise voice client)


  • can be integrated with the standard edition Front End server role in case it is a basic configuration
  • cannot coexist with Lync Web Access
  • cannot coexist with Lync Edge Server
  • cannot coexist with Lync Enterprise edition Front End Server