ITU-T specification, based on Q.931, for establishing, maintaining, and clearing network connections at the B-ISDN user-network interface. The UNI 3.1 specification is based on Q.2931. See also Q.931 and UNI.
ITU-T specifications for the ISDN UNI data link layer. See also UNI
ITU-T specification for Frame Relay encapsulation.
ITU-T specification for signaling to establish, maintain, and clear ISDN network connections. See also Q.93B.
ITU-T specification for signaling to establish, maintain, and clear BISDN network connections. An evolution of ITU-T recommendation Q.931. See also Q.931.
quality of service. Measure of performance for a transmission system that reflects its transmission quality and service availability.
Q (point of the ISDN model) Signaling. Signaling standard. Common channel signaling protocol based on ISDN Q.931 standards and used by many digital PBXs.
Message used to inquire about the value of some variable or set of variables.
1. Generally, an ordered list of elements waiting to be processed.
2. In routing, a backlog of packets waiting to be forwarded over a router interface.
Amount of time that data must wait before it can be transmitted onto a statistically multiplexed physical circuit.