Cisco Jackscrew User Manual
Doc. No. 78-1127-01 Rev. A0
JackscrewInstallationInstructions (for EIP Ports)
For Cisco Part Number 51-0385-01
Customer Order Number: DOC-781127=
This document provides instructions for replacing the slide-type Ethernet connector
locks with jackscrew type connector locks. Typically, Ethernet ports and cable
connectors have either slide-type or screw-type locks, both of which provide strain
relief and secure the cable to the router port. The slide-type lock is most common, and
it is standard on EIP ports.
If your Ethernet cables use thumbscrews rather than posts, you must replace the
slide-type lock with jackscrews before you can connect the cables to the ports.
You can complete this replacement while the EIP is installed and operating in the
chassis; however, we recommend that you shut downan enabled interfaces before you
work on the port.
The sections in this document include the following:
■ “Obtaining Technical Assistance,” page 2
If you encounter installation problems that you cannot resolve, this section
provides instructions for obtaining technical assistance and lists the information
you will need to provide to the customer service or TAC representative when you
call
■ “Product Overview,” page 2
A brief illustrated description of the EIP and the two types of cable locks
■ “Prerequisites,” page 4
Safety guidelines to prevent damage to the equipment from electrostatic discharge
(ESD) and the tools and parts you will need for this replacement
■ “Installation,” page 6
Procedures for shutting down interfaces that are already enabled, for replacing the
slide-type lock bracket with jackscrews, and for verifying that you are able to bring
the interfaces back up and resume operation
Copyright © 1993, Cisco Systems, Inc.1
All rights reserved.
Obtaining Technical Assistance
This document contains instructions for replacing the slide-type connector locks that
are standard on Cisco 7000 EIP ports with jackscrews so that you can connect cables
with thumbscrews to the ports. If you encounter problems that you are unable to
resolve, contact a customer service representative or the Technical Assistance Center
(TAC) for assistance. You can phone the TAC at 800 553-2447, or send email to
tac@cisco.com.
Before you call the TAC or a customer service representative, have the following
information ready:
■ Date you received the Cisco 7000
■ Chassis serial number (located on a label on the right rear deck of the chassis)
■ Type of software and version number
■ Type of installation or upgrade you are performing (replacing EIP cable locks)
■ Title and Doc. No. of this document (from the front page)
■ Brief description of the problem you are having
■ Brief explanation of the steps you have already taken to isolate and resolve the
problem
■ Maintenance agreement or warranty information
Product Overview
Refer to the Cisco 7000 Hardware Installation and Maintenance publication for
complete system installation and startup procedures, and for physical descriptions of
chassis components.
The type of connector lock you use on the EIP ports depends on the type of Ethernet
interfacecables you use. Cables with two short posts on the cable connector need a port
with a slide-type lock—a bracket on the port slides (or snaps) around the posts on the
cable connector to secure it. Cables with knurled thumbscrews (screws you can tighten
with your fingers) on the cable connector need a port with jackscrews (into which you
insert and tighten the thumbscrews). Both types of locks are shown in Figure 1.
Sliding bracket
Thumbscrew
2Jackscrew Installation Instructions (for EIP Ports)
Post
H1887
Jackscrew
Figure 1 Ethernet Connector Locks, Slide-Type and Jackscrew-Type
TheEIP is the 2, 4, or 6-porthigh-speed Ethernet interface processor for the Cisco 7000
router. The EIP and other interface processors (IPs) slide into slots in the rear of the
router chassis (which is shown in Figure 2) and connect directly to the backplane. You
can replace the connector locks while the EIP is installed in the chassis, provided that
you first shut down the interface ports on which you will change connector locks.
Figure 2 shows a 6-port EIP installed in IP slot 1.
DC FAIL
AC POWER
Upper
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DC FAIL
AC POWER
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Lower
power supply
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Slot 0
2
1
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Figure 2 Cisco 7000 Chassis Rear View
Figure 3 shows a 6-port EIP as it is shipped from the factory, with the standard
slide-type locks on all six ports.
The Enabled LED lights to indicate that the EIP is receiving power and is enabled for
operation. The bank of 18 LEDs indicate the state of the individual interfaces, with one
horizontal row of 3 LEDs for each of the 6 ports (numbered 0 through 5). The LEDs
light when the indicated port detects the following network activity:
■ Collision—Lights when a frame collision has been detected.
Jackscrew Installation Instructions (for EIP Ports) 3
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