Mitel NWK954 manual Preliminary Information, Ordering Information, Features

NWK954

QUAD FAST ETHERNET REPEATER

PRELIMINARY INFORMATION

Supersedes January 1998 version, DS4842 - 1.1 DS4842-2.1 April 1998

The NWK954 is a fully integrated, unmanaged, 4-port Fast Ethernet Repeater conforming to the IEEE 802.3 100BASE-TX Standard. The device integrates the 802.3 Repeater functions with four 100BASE-TX PHY modules, enabling direct connection to the isolation transformers with no additional PHY components.

It has built-in LED drivers for display of port activity and network utilization. There is a local expansion port which allows up to six NWK954s to be cascaded to form a 24-port repeater with no additional components.

With the addition of simple backplane driver/receivers, up to eight 24-port repeaters can be stacked.

The NWK954 is supplied in a 128-pin PQFP and interfaces to the twisted pair media through 1:1 isolation transformers.

ORDERING INFORMATION

NWK954D/CG/GH1N

FEATURES

■Compliant with IEEE 802.3 100BASE-TX Repeater Unit Specification

■Incorporates four IEEE 802.3 Compliant 100BASE-TX Ports

■Local Expansion Port for Cascading to 24 Ports

■Stackable Backplane for Expansion up to 192 Ports

■Link/Activity LED and Receive Error LED for each Port

■Collision LED

■Five LED Network Utilization Display

■Base Line Wander Correction

■Power Saving on Unused Ports

■Driven from a Single 25MHz Clock

■Single 5V supply

■Low Power CMOS Technology

■128-pin PQFP package

				OSCILLATOR
BACKPLANE CONTROLS		BACKPLANE BUFFERS		CLOCK DRIVERS
LOCAL EXPANSION BUS
NWK954	NWK954	NWK954	NWK954	NWK954	NWK954
QUAD	QUAD	QUAD	QUAD	QUAD	QUAD
MAGNETICS	MAGNETICS	MAGNETICS	MAGNETICS	MAGNETICS	MAGNETICS
QUAD RJ45

Fig. 1 System block diagram