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protocol Glossary
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000
484
protocol
A set of conventions or rules governing the format and timing of message
exchanges to control data movement and correction of errors.
PSDN
Packet-switch public data network.
PSTN
See Public Switched Telephone Network (PSTN).
PSN
Packet-switched network.
Public Switched Telephone Network (PSTN)
The worldwide voice telephone system.
Q QPPCN
Quality Protection Plan Change Notice.
QSIG
A set of open standards for Enterprise Networking. QSIG is a protocol defining
message exchanges (signalling) at the “Q” reference point between two PBXs.
R RBS
Robbed-bit signaling.
RFC
Request for comment.
restricted facilities
PRI spans that use ZCS line coding, the opposite of unrestricted facilities.
RNX
Route-number index (private network office code)
router
An interface between different networks. Routers support network
management, including load balancing, route optimization, prioritizing of calls,
and troubleshooting. They are thus more capable than bridges.