Cisco Systems 8600 Series manual Egress

ASI-1, ATM Service Interface Card

Features

A summary of features for the ASI card include:

•Two 45 Mb T3 ATM UNI/NNI ports per card for connection of user devices.

•Allows connections between UNI ports on a single node, between nodes, and NNI connections between networks.

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Maximum of 1000 connections per card.

Aggregate transport rate of 96,000 cps per port (T3) or 80,000 cps (E3).

VCC and/or VPC addressing.

Ingress to ASI, each PVC is assigned a separate input queue.

Egress from ASI, sixteen fixed queues per line, including CBR, VBR, and ABR queues.

Optional 1:1 card redundancy using Y-cable configuration.

Functional Description

Each ASI-1 card provides two ATM UNI/NNI ports, each operating at DS3 rates or E3 rates (see Figure 5-2). Any of the 12 general purpose slots can be used to hold these cards. The ASI-1 operates with a corresponding T3 or E3 Line Module back card LM-2T3 or LM-2E3, respectively. Only the first two connectors on the back card are active; the lower port is not used.

Figure 5-2 ASI-1 Simplified Block Diagram

Control		Egress
&
admin.
	Cell		Cell
	queues		service

backplane
	Serial
StrataBus
	interface
	module

Ingress

Rate	Queues	UPC	Address
control			translation

DS3 port logic, PLPP

DS3 #1

DS3 #2

H8155

Each port provides an aggregate ATM connection bandwidth of 96,000 cells/second (T3) or 80,000 cells/sec (E3), or 353,208 cells/sec (OC3).

Connections are added using the addcon command.

Service Interface (Line) Cards 5-3