Panasonic 15000 Frame relay-to-ATM interworking function FR-ATM IWF, FR-ATM accounting, Free list

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List of terms

transmission facilities (high-quality digital facilities), which are affected by far fewer transmission errors. Furthermore, many functions such as sequencing flow control and retransmission are performed by end user equipment.

Frame relay-to-ATM interworking function (FR-ATM IWF)

A Nortel Multiservice Switch frame relay service that provides interworking functions between frame relay PVCs and ATM PVCs using AAL-5.

See also, FR-ATM interworking service (page 56).

FR-ATM accounting

An accounting service that collects usage information (byte and frame counts) on FR-ATM connections. Service providers can use this information to bill their customers, or for test, statistics, network engineering, and planning purposes.

FR-ATM gateway

An application of the FR-ATM interworking service that converts frame/cell traffic to and from ATM cell traffic. The FR-ATM gateway provides a frame relay interface (either UNI or NNI) that converts frame relay traffic coming in from its link into cells leaving the node at an ATM interface. In the other direction, the gateway converts cell traffic coming into the node at the ATM interface to frame relay traffic going out on the frame relay UNI or NNI. The FR-ATM services frame relay traffic originating across the frame/cell subnet.

FR-ATM interworking service

The FR-ATM interworking service allows the carriage of frame relay traffic over an ATM networking and transport infrastructure. It maps frame relay permanent virtual circuits (PVCs) to and from ATM PVCs to provide connectivity between frame relay CPE and ATM-capable CPE. The FR-ATM interworking service comprises a core frame relay UNI/NNI service and an interworking function.

The FR-ATM interworking supports the application of the FRF.8 standard for service interworking (SIWF) and the FRF.5 standard for network interworking (NIWF).

free list

The part of the shared memory that is currently unused and available for data arriving into the FP card.

free list size

The number of blocks that currently make up the free list.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

Copyright © 2006, Nortel Nortel Confidential