ADTRAN Express 6120 Manual de instrucciones descargar pdf (Pagina 148)

Glossary

Glossary-8 Express 6100/6120 User Manual 61200176L1-1

phase jitter

Intelephony,themeasurementindegrees out-of-phasethatananalog

signaldeviatesfromthereferencephaseofthemaindata-carryingsig-

nal. Often causedby 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

Routeswhichhave an infinitemetricwhichtootherroutersmeans 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

channelsand one 64kbpsD-channel. Alsoknownas PrimaryRate In-

terface (PRI).

RIP

Routing Information Protocol. A protocol used to exchange routing

information among a setof computersconnected bya LAN. RIP uses

hopcountsasaroutingmetric.

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

Themethod by whicharouting algorithmdeterminesone route isbet-

ter thananother. This information isstored in routing tables. Such ta-

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ADTRAN Express 6120 Manual de instrucciones Pagina 148