Glossary170 Installation ManualRAS ChannelAn unreliable channel used to convey the Registration, Admissions, and Status messagesand bandwidth changes between two H.323 entities.Reliable TransmissionConnection-oriented data transmission that guarantees sequenced, error-free, flow-controlled transmission of messages to the receiver.Real-Time Protocol/Real-Time Control Protocol (RTP/RTCP)IETF specifications for audio and video signal management. Allows applications tosynchronise and spool audio and video information.Remote maintenanceOne of the service functions supported by the KX-TDA0480. The KX-TDA0480 can bemaintained remotely over a network connection. The Maintenance Console Softwaresupports remote maintenance functions.Routed CallGives call status control of Gatekeeper priority.Path control signal (Q.931) is also sent tothe calling terminal via the Gatekeeper. Although there will be more Gatekeeper load, logscan be collected accurately for accounting purposes, etc., since the communication statuscan be grasped completely.Signal methodEncoding method of H.245 when transferring DTMF signals on an IP network. The purposeof this method is to transfer DTMP signals. The transmission time of DTMF signals can bespecified on the receiving side (not available on the KX-TDA0480). For the KX-TDA0480,the method is selected when the communicating party is H.245 V3 or later.Static address conversionAddress conversion method that assigns a fixed global address when connecting a devicewithin the space of a private address to the Internet.System functionSystem function is a category of the service functions supported by the KX-TDA0480. Thiscategory separates various functions that compose an internet/intranet telephony networkfrom a system point of view. This category includes functions such as network buildingfunctions, functions to accommodate various kinds of terminals, and functions needed tomonitor the connection lines.TCPTransmission Control Protocol. A reliable networking layer on top of IP.