Table of Contents
Advertisement
Glossary
phase jitter
In telephony, the measurement in degrees out-of-phase that an analog
signal deviates from the reference phase of the main data-carrying sig-
nal. Often caused by alternating current components in a telecommu-
nications network.
point-to-point protocol (PPP)
An implementation of TCP/IP which is intended for transmission us-
ing telephone lines. PPP provides router-to-router and host-to-net-
work connections over both synchronous and asynchronous circuits.
poison routes
Routes which have an infinite metric which to other routers means the
network for the route is inaccessible.
PRA
Primary Rate Access. Connects high-capacity CPE, such as PBXs, to
the network. In the US, this is composed of twenty-three 64 kbps
channels and one 64 kbps D-channel. Also known as Primary Rate In-
terface (PRI).
RIP
Routing Information Protocol. A protocol used to exchange routing
information among a set of computers connected by a LAN. RIP uses
hop counts as a routing metric.
router
An interface which finds the best route between two networks. Rout-
ers forward packets from one network to another, based on network
layer information.
routing metric
The method by which a routing algorithm determines one route is bet-
ter than another. This information is stored in routing tables. Such ta-
Glossary-8
Express L768 User Manual
61203192L1-20
Advertisement
Table of Contents
