Jumper Settings - Cabletron Systems TRBMIM-T User Manual

Token ring bridge/management module

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2.5.2 Jumper Settings

Refer to Figure 2-5 when setting jumpers. Please note that the backup

battery jumper is labeled JP6 and the Clear to Send jumper is labeled JP5

on the component board.

Wear a properly grounded Electric Static Discharge (ESD)

wriststrap when positioning jumper sleeves.

C AUT IO N

Enabling The NVRAM Backup Battery With The JP6 Jumper

Use JP6 to enable or disable the backup battery. The battery supplies

power to NVRAM and the real time clock and calender when the

TRBMIM-T is not installed in and drawing power from the MMAC and

also when the TRBMIM-T is being reset in the MMAC.

The module is shipped from the factory with the battery

NOTE

charged but disabled. It is recommended that you enable the

backup battery before installing the TRBMIM-T.

•

To enable the battery, put the jumper over pins 2 and 3.

•

To disable the battery (recommended if the module is to be stored for

up to a year), or if you want to clear NVRAM, put the jumper over pins

1 and 2.

When clearing NVRAM, wait five seconds before re-enabling the

battery to ensure that all system parameter settings have been cleared

from NVRAM.

Disabling the battery clears NVRAM; you lose all parameter

settings you speciﬁed in Local Management such as IP

addresses and FNB and bridge conﬁgurations, and the

C AUT IO N

TRBMIM-T reverts to its default settings. See the

TRBMIM/TRBMIM-T Local Management User's Guide for

information about default management and bridge settings.

REQUIREMENTS AND SPECIFICATIONS

2-9

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