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List of terms

DTL originator

The first lowest-level node within the entire PNNI routing domain to build the initial DTL stack for a given connection.

DTL terminator

The last lowest-level node within the entire PNNI routing domain to process the connection (and thus the DTL for the connection).

DTMF

See dual tone multi-frequency (DTMF) (page 45)

dual-bus mode

A configuration in which both backplane buses are available to carry cells between operational cards.

dual fabric mode

A configuration in which both backplane fabric cards are available to carry cells between operational cards.

dual-FP line APS

A type of implementation scheme that uses two optical interface cards to provide SONET or SDH line automatic protection switching. Dual-FP APS allows equipment sparing for optical interface cards.

See automatic protection switching (APS) (page 15).

dual leaky bucket

See inverse-UPC shaping (page 68).

dual tone multi-frequency (DTMF)

A signalling method that uses specific pairs of frequencies within the voice band for signals.

dynamic generic cell rate algorithm (DGCRA)

A version of the GCRA. DGCRA uses information supplied by ABR.

dynamic packet routing system (DPRS)

Aconnectionless routing system for delay-sensitive and high-throughput variable bit rate traffic. DPRS carries data traffic such as frame relay and all DPN-100 services such as X.25.

E1

The 2.048 Mbit/s interface defined in ITU-T G.703. Usually consists of a framed pattern of thirty-two 64 kbit/s time slots.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

Copyright © 2006, Nortel

Nortel Confidential

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Panasonic 15000 manual Dtmf