If deployed between the Meeting Server and an on-premises Microsoft Skype for Business infrastructure, the Cisco Expressway-C can provide IM&P and video integration. In addition, the Cisco Expressway-C can provide the following fuctionality:
- a SIP Registrar,
- an H.323 Gatekeeper,
- call control in Meeting Server deployments with Call Bridge groups configured to load balance conferences across Meeting Server nodes.