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Cabletron Systems NB20E, NB25 E user manual Safety, Service, Physical Properties

Models: NB25 E NB20E

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SAFETY

INSTALLATION REQUIREMENTS/ SPECIFICATIONS

SAFETY

Designed in accordance with UL478, UL910, NEC 725-2(b), CSA, IEC, TUV, VDE class A. Meets FCC part 15, Subparagraph J, Class A limits.

WARNING: It is the responsibility of the person who sells the system of which the NB20E or NB25E will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions.

SERVICE

MTBF (MHBK - 20E):
NB20E:	> 35,750 hrs. projected.
NB25E:	> 26,533 hrs. projected.
MTTR:	< 0.5 hrs.
PHYSICAL PROPERTIES
Dimensions:	3.2H x 17.0W x 12.4D inches
	(8.13 x 38.1 x 31.5 cm)
Weight
Unit:	7 lbs. (3.17 kg.)
Shipping:	8 lbs. (3.63 kg.)

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Cabletron Systems NB20E, NB25 E user manual Safety, Service, Physical Properties

Contents

NB20E and NB25 E TWO PORT ETHERNET BRIDGES USER’S MANUAL CABLETRON SYSTEMS, P.O. BOX 6257, ROCHESTER, NHPage Copyright May 1990 by Cabletron Systems Inc FCC NOTICE CONTENTS INSTALLATION REQUIREMENTSSPECIFICATIONS INSTALLING THE NB20E OR NB25E BRIDGECONTENTS 1.1 USING THIS MANUAL CHAPTER INTRODUCTION1.2 GETTING HELP 1.3 THE NB20E AND NB25E TWO PORT ETHERNET BRIDGE1.4 THE BRIDGE FILTERING METHOD Figure 1-1 Bridging Method NODE ANODE C LAN NODE B1.5 MULTIPLE BRIDGE ENVIRONMENTS 1.5.1 The Root Bridge1.5.2 Primary and Redundant Data Paths Figure 1-2 Multiple Bridging Environments1.6 REMOTE LANVIEW 1.7 RELATED MANUALS 2.2 NETWORK REQUIREMENTS CHAPTER INSTALLATION REQUIREMENTS SPECIFICATIONS2.1 LOCATION REQUIREMENTS 2.3 OPERATING SPECIFICATIONS INSTALLATION REQUIREMENTS/ SPECIFICATIONSFRONT PANEL INDICATORS FRONT PANEL SWITCHESRS232 PORT FRONT PANEL SWITCHES contAUI PORT NB20E/NB25E POWER SUPPLY REQUIREMENTS ParameterTypical WorstPHYSICAL PROPERTIES SAFETYSERVICE 3.1 UNPACKING THE NB20E OR NB25E BRIDGE CHAPTER INSTALLING THE NB20E OR NB25E BRIDGE3.2 INSTALLING THE BRIDGE 3.2.1 Installing the Rack Mount Brackets 3.2.2 Cable Support Installation 3.2.3 Connecting The Bridge To The Network3.2.4 Setting The Mode Switches 3.2.5 Connecting The NB20E or NB25E To The Power Source NB-25EThe following conditions indicate a problem has been detected with the bridge NB-25E CHAPTER TESTING AND LANVIEW4.1 INSTALLATION CHECK-OUT 4.2 USING LANVIEW 4.3 USING THE FORWARD BROADCAST SWITCH TESTING AND LANVIEW ON LINE LEDSTAND BY LED TRANSMIT XMT LED4.4 USING THE ROOT SWITCH