| Configuring Account Settings | 80Parameter Description Configuration MethodLocal Early Media Enable or disable the local earlymedia feature on the device.• Off—the local system sendsan Open Logical Channel(OLC) message and receivesthe acknowledgementmessage of OLC from thefar site. After receiving theacknowledgement message,the system may transmit RTPstreams to the far site.• On—the system sendsan OLC message to thefar site and then transmitsRTP streams to the far sitedirectly before receivingthe acknowledgementmessage of OLC. For somegatekeepers, you need toenable this feature to avoidblack screen during a call.Default: Off.Web user interfaceH.323 TunnelingThe tunneling feature relies on H.225 system-to-system connectivity (via TCP) to pass H.245 messages, and uses theH.225 communication channel without creating a separate TCP socket connection (per H.323 call) for media control.H.323 tunneling is supported by the video conferencing system. To use H.323 tunneling, make ensure the participantsin the call enable H.323 tunneling simultaneously.Procedure1. Do one of the following:• On your web user interface, go to Account > H.323.• On your VCS, go to More > Setting > Advanced > H.323.On your VP59, tap Setting > Advanced > H.323.• On your CTP20, tap Setting > Advanced > H.323.2. Configure and save the following setting:Parameter Description Configuration MethodH.323 Tunneling Enable or disable the systemto send all signaling and mediathrough the HTTP tunnel.Default: Off.Web User InterfaceEndpointCTP20
