Cabletron Systems NBR-420 manual Chapter Introduction, NBR-SERIES Installation Guide, Page, Port B

CHAPTER 1

INTRODUCTION

The Cabletron Systems NBR-SERIES of Network Bridge Routers (NBR-220,NBR-420,NBR-620)provide bridging and routing solutions for Ethernet, token ring, FDDI, ATM, or wide area networks. The NBR-SERIES of standalone hubs consist of the following three models:

•NBR-220– two Ethernet Port Interface Module (EPIM) ports

•NBR-420– two EPIM ports, and two Bridge/Router Interface Module (BRIM) ports

•NBR-620– four EPIM ports, and two BRIM ports

NBR-220TWO PORT BRIDGE WITH LANVIEW®

	PWR
RESET	CPU
	COM

NBR-420MULTI PORT BRIDGE ROUTER

	PWR
DISPLAY RESET	CPU
COM 2	COM 1

NBR-620MULTI PORT BRIDGE ROUTER

	PWR
DISPLAY RESET	CPU
COM 2	COM 1

RECEIVE
TRANSMIT
COLLISION		PWR	PWR
STAND BY	EPIM-A		EPIM-A

B A PORT PORT B PORT A

WITH	LANVIEW®	T1/FT1	SYNC
			LNK YEL STB DSR LNK
					STY	XMT
					LNK	RCV
			TST RED SYN CTS TST				BRIM-A100
			BRIM-WT1	PORT F	PORT E
	RECEIVE
	TRANSMIT
	COLLISION					PWR	PWR
	STAND BY					EPIM-A	EPIM-A

B A PORT PORT B PORT A

WITH	LANVIEW®	T1/FT1	SYNC
		LNK YEL STB DSR LNK
					STY	XMT
					LNK	RCV
		TST RED SYN CTS TST	BRIM-WT1	PORT F	PORT E		BRIM-A100
	RECEIVE
	TRANSMIT
	COLLISION		PWR		PWR	PWR	PWR
	STAND BY	EPIM-A			EPIM-A	EPIM-A	EPIM-A

D C B A PORT PORT D PORT C PORT B PORT A

1092_01

Figure 1-1 The NBR-SERIES of Network Products

NOTE

This manual uses the term NBR to describe the NBR-220, NBR-420, and NBR-620 unless otherwise specified.

NBR-SERIES Installation Guide Page 1-1