- Q -

Q.921

See Link Access Procedures on the D Channel (LAPD).

Q.931

CCITT recommendation Q.931 describes an ISDN protocol for the network layer (layer 3 in the OSI layering model). See also network layer, OSI.

QSLAC

Quad Subscriber Line Audio Circuit; four-port audio circuit which can be programmed to comply with country-specific line parameters. See also port.

queuecontext

Data structure containing device information relative to all instances of the CT Access service.

quiesced

The state of a high availability system when no operations are in process or pending, and there is no authorization to launch new operations.

QX

The NMS board family which features low port telephony and voice processing hardware.

qxload

Utility program which reads a configuration file and uses it to load and configure the QX 2000 hardware.