The Cisco IOS H323 Gatekeeper is an intelligent unified communications network component. Formerly included as part of the Cisco Unified Border Element, the Cisco IOS H323 Gatekeeper helps enable an end to end IP based architecture by providing an essential capability for H323 networks. The Cisco IOS Gatekeeper has been a component of IOS for several years and has an extensive set of capabilities for interconnecting H323 endpoints.

The Cisco IOS H323 Gatekeeper is a licensed separately in the ISR G2 as a standalone capability distinct from the Border Element functionality. The Gatekeeper is H323v4 compatible and allows for both video and voice H323 calls to be connected across H323 networks.