H.323 is an Internet standard set of protocols for the transmission of real-time audio, video, and data using packet-switching technology. Experience Portal uses H.323 connections with an Communication Manager to handle Voice over IP (VoIP) telephony.

To provide VoIP capabilities, H.323 uses:

• Terminals, which can be PCs or dedicated IP softphone devices.

• Gateways, which “translate” communications between dissimilar networks, such as IP networks and Public Switched Telephone Network (PSTN). In the Experience Portal system, the Communication Manager handles this function.

• A gatekeeper, which acts as the control center for all H.323 VoIP interactions in the system. In the Experience Portal system, the Communication Manager handles this function.

  Important:

  You must use Communication Manager 3.1 build 369 or later with the Avaya Special Application SA8874 feature. This combination provides:

  • VoiceXML supervised transfers. Without the SA8874 feature, supervised transfers have no access to call progress information and behave like a blind transfer.

  • The Application Interface web service for outbound calling. Without the SA8874 feature, the web service has no access to call progress information and may start a VoiceXML application even when the connection attempt receives a busy signal.

    Note:

    The SA8874 feature comes with Communication Manager version 3.1 or later, but it requires a separate license before it can be enabled.