Specifications

12 Token Ring Interface Processor (TRIP) Installation and Configuration
Installation Prerequisites
Telephone Wiring Safety
Use the following guidelines when working with any equipment that is connected to telephone
wiring or to other network cabling:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying telephone lines.
Preventing Electrostatic Discharge (ESD) Damage
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. The TRIP comprises a printed
circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding,
connectors, and a handle are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap whenever handling the TRIP. Handle
the carriers by the handles and the carrier edges only; never touch the boards or connector pins.
Following are guidelines for preventing ESD damage:
• Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
• Connect the equipment end of the strap to a captive installation screw on an installed power
supply.
• When installing a TRIP, use the ejector levers to properly seat the bus connectors in the
backplane, then tighten both captive installation screws. (See Figure 10.) These screws prevent
accidental removal, provide proper grounding for the system, and they help to ensure that the bus
connectors are seated in the backplane.
• When removing a TRIP, use the ejectors to release the bus connectors from the backplane. Use
the handle to pull the TRIP out slowly while keeping your other hand underneath the carrier to
guide it straight out of the slot.
• Handle carriers by the handles and carrier edges only; avoid touching the board or connectors.
• Place a removed TRIP board-side-up on an antistatic surface or in a static shielding bag. If you
plan to return the component to the factory, immediately place it in a static shielding bag.
• Avoid contact between the TRIP and clothing. The wrist strap only protects the board from ESD
voltages on the body; ESD voltages on clothing can still cause damage.
• Never attempt to remove the TRIP printed circuit board from the metal interface processor
carrier.
Caution Periodically check the resistance value of the antistatic strap. The measurement should
be between 1 and 10 megohms.