Q.921/931 ITU-TS (formerly
CCITT) Q Series Recommendations describing Lap- D, the Layer Two
protocol for an ISDN D-channel.
Qbit (Qualifier bit) In
X.25 networks, bit 8 in an octet of packet header. It is used
to indicate if a packet contains control information.
QLLC (Qualified Logical Link Control) Routines
to provide Synchronous Data Link Control.
Quartet Signaling Part
of the 100BaseVG-AnyLAN proposed standard involving transmission
over all four wire pairs simultaneously in voice-grade UTP cable,
expanding its capacity to 100Mbit/s.
