Avaya a500 Mode D'Emploi

Cajun A500 ATM Switch Overview

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Cajun A500 ATM Switch User Guide

4. The local task processes the PDU and performs the appropriate action. For example, 

the Signaling/Routing Engine parses the PDU and determines the forwarding path. 

A cross-connection through the switch is setup, if necessary.

5. The forwarded PDUs are passed to the Segmentation and Reassembly (SAR) unit.

6. The SAR segments the PDU and hands off the cells to the switch for transmission.

7. Ethernet traffic is management traffic that is handled locally.  

PNNI Routing Task

The PNNI Routing function includes computing and maintaining neighbor connectivity 

and distributing the link state database amongst the physical and logical peer groups. The 

Routine Service portion specifically, is consulted by the signalling task for forwarding 

signalling messages to the appropriate destination.

ILMI Task

The Integrated Local Management Interface (ILMI) includes auto-negotiation, address 

and service registration, and exchange of link information with the peer ILMI 

component across all the physical links.

Call Control Task

The call control processing includes configuring the signalling task, interfacing with the 

Switch Fabric control components, interfacing with the local CAC, and associating the 

incoming and outgoing call processing.

UNI/PNNI Signalling Task

UNI/PNNI Signaling is responsible for setting up, tearing down, and maintaining UNI 

3.0/3.1/4.0 as well as PNNI connections.