Cisco 2020 User Manual

CHAPTER

Installing a LightStream 2020 Switch

Installing a LightStream 2020 multiservice ATM switch (LS2020 switch) in a networking environment involves several tasks in two major categories:

• Installing the LS2020 Hardware

Separate sections in this chapter are devoted to the following topics:

— “Observing Safety Precautions” — “Unpacking and Inspecting LS2020 Hardware” — “Installing an LS2020 Switch in Rack” — “Wiring a DC-Powered System” — “Installing Fantails” — “Attaching Data Cables” — “Closing the Chassis” — “Applying System Power”

Detailed site planning and preparation information can be found in the LightStream 2020 Site Planning and Cabling Guide.

Detailed information for installing additional components in an existing LS2020 switch is provided in this document in the chapter entitled “Installing Additional Components.”

• Performing basic conﬁguration procedures

Basic conﬁguration tasks for the LS2020 switch are accomplished using conﬁguration scripts. These procedures are presented in this chapter in the section “Basic LS2020 Conﬁguration Tasks.”

Before continuing with this chapter, you should read the LightStream 2020 Release Notes for important, release-speciﬁcinformation that may not appear elsewhere in the LS2020 documentation set.

Installing a LightStream 2020 Switch 2-1

Observing Safety Precautions

Warning LS2020 switches are designed and manufactured to meet accepted safety standards.

However, improper use can result in electrical shock, ﬁre hazards, and personal injury. Read the following instructions carefully before installing and using an LS2020 switch. Heed all Cautions and Warnings.

Electrostatic Discharge Protection

Static electricity can damage or degrade electronic components. Therefore, observe the precautions described below in handling LS2020 hardware.

Grounding Procedure

Before removing any part of the LS2020 enclosure to expose its circuitry, you must ensure that you, the equipment rack, and the circuit boards are at ground potential to prevent electrostatic discharge (ESD). Such spurious discharges can damage LS2020 components. To place yourself at ground potential, wear a wrist strap connected to one of the ESD grounding jacks on the front and rear of the LS2020 chassis or to the bare metal chassis frame itself.

Card Protection

All spare cards are shipped in a separate, reusable antistatic shielding bag. Store each card in its bag until the cardis installed inthe machine. Do not remove a card from itsbag unless you are grounded. Do not place a bag on exposed electrical contacts where it can cause short circuits.

Unpacking and Inspecting LS2020 Hardware

To unpack the LS2020 switch, perform the following steps:

Step 1 Before moving the shipping container from the loading dock to the systems area, inspect it

for any signs of in-transit damage.

Step 2 Transport the container to the systems area where the LS2020 switch is to be installed. Step 3 Cut the packing straps and lift the cardboard box off the LS2020 chassis. Remove the

packing material.

Step 4 Check for the presence of the power cord and country kit. Step 5 Inspect all external surfaces of the chassis for signs of damage. Pay special attention to

areas of the chassis corresponding to visible damage to the shipping container.

Step 6 Document any damage noted during the inspection. Step 7 Advise your LS2020 vendor of such damage.

2-2 LightStream 2020 Installation Guide

Installing an LS2020 Switch in Rack

This section explains how to mount an LS2020 chassis in an equipment rack.

Note For physical stability, when an LS2020 chassis is installed in a rack, the equipment

conﬁguration should comply with UL Standard 1950, Par. 4.1.1, and IEC 950, 4.1.1.

Cooling Air and Hardware Placement

An LS2020 chassis takes in cooling air at the bottom of the front panel and exhausts it at the top rear and right side of the chassis. (The air vents on the right side of the chassis can safely be covered by the rack side panels, but they should not otherwise be blocked.) To minimize the potential for thermal problems, position the LS2020 chassis so that:

• The air intake panel is not near the exhaust of other equipment.

• The exhaust is not near the air intake of other equipment.

Required Tools

Ensure that you have the following items on hand before you begin installing the LS2020 switch:

Installing an LS2020 Switch in Rack

• A Number 2 Phillips screwdriver for mounting the chassis.

• A 5/16-inch slotted-tip screwdriver for removing blowers, power supplies, and boards from the

chassis.

• An ESD wrist strap for grounding yourself to the chassis.

• Antistatic shielding bags or antistatic mats for protecting components removed from the chassis.

• Appropriate material-handling equipment for lifting the LS2020 switch into the rack.

• For AC-powered systems: an LS2020 Country Power Kit, which includes a power cord and

mounting hardware for the chassis.

• For DC-powered systems: a DC Mounting Kit, which contains mounting hardware for the

chassis, plus equipment needed by the electrician for wiring the system (see the subsection entitled “Preparation for Wiring” later in this chapter).

Rack Installation Procedure

To mount the LS2020 switch in an equipment rack, perform the following steps:

Step 1 Ensure that the power cord to the system is disconnected. Step 2 Put on the ESD wrist strap and connect it to a grounding jack on the front or the rear panel

of the LS2020 chassis.

Step 3 Reduce the weight of the system by removing the blowers (top front and top rear) and

power supplies (right rear) from the chassis. These components are located behind removable covers. Figure 2-1 shows the front view

of the LS2020 chassis, while Figure 2-2 shows the rear view of the chassis.

Installing a LightStream 2020 Switch 2-3

Installing an LS2020 Switch in Rack

If your system is fully conﬁgured with function cards, you may also remove some or all of these cards to further reduce the weight of the chassis. (Refer to the LightStream 2020 Hardware Referenceand TroubleshootingGuide for component removal instructions.) Put all removed electronic components in antistatic shielding bags or place them on antistatic mats.

Note Do not remove disk assemblies as a means of reducing chassis weight.

Step 4 Determine the desired mounting position in the rack for the LS2020 switch. Attach the clip

nuts from the country kit or the rack mounting kit to the appropriate positions on the rack rails.

See Figure 2-1 for the location of mounting screw slots. (If your rack has metric-threaded or non-standard rails, you may need to provide your own mounting hardware.)

Step 5 Lift the LS2020 chassis into the desired mounting position in the rack.

Warning An LS2020 chassis is heavy, particularly if it is completely conﬁgured with function

cards. (The weight of the system ranges from 94 to 147 pounds, depending on the system conﬁguration.) Do not risk personal injury or equipment damage by attempting to transport or lift the system without assistance.

Caution Do not use the disk assembly handles to lift the chassis. These handles, shown in

Figure 2-1, are not designed for weight-bearing loads and may break off if used to lift the chassis.

Step 6 Using the mounting screws and washers included in your country kit or rack mounting kit,

secure the ﬂanges on the front of the LS2020 chassis to the rack.

Step 7 Replace any items that you removed from the chassis in Step 3 above (blowers, power

supplies, function cards, and covers) preparatory to installing the chassis into the rack.

2-4 LightStream 2020 Installation Guide

Figure 2-1 Front View of LightStream 2020 Chassis

Mounting flanges

Blower (behind cover)

Installing an LS2020 Switch in Rack

Disk assembly

Disk assembly handle unsafe for lifting!

Disk assembly

LightStream 2020

™

Disk assembly handle unsafe for lifting!

ESD jack

Line cardsNP card

cards

Slots for mounting screws

(12 places)

H4812

Line cardsSwitch

Installing a LightStream 2020 Switch 2-5

Installing an LS2020 Switch in Rack

Figure 2-2 Rear View of AC-powered LightStream 2020 Chassis

Blower (behind cover)

T3AC

R F

AC power tray

CEMAC

O A

FEAC

RX0

TX0

RX1

TX1

RX2

TX2

RX3

TX3

Warnhinweise fur den Gebrauch des Lasers sind im Installationshandbuch enthalten. Consulter le manuel d'installation au sujet de l'avertissement sur le laser.

NVISIBLE LASER RADIATION IS EMITTED FROM

WAVELENGTH: 850nm

MAXIMUM OUTPUT: 63.1 µW

CERTIFIED TO: EN 60 825:1994

THIS APERTURE.DO NOT STARE INTO BEAM OR

VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

CLASS 3A LASER PRODUCT.

RX4

TX4

RX5

TX5

RX6

TX6

RX7

Consulte el manual de instalacion para informarse sobre las advertencias relativas al laser.

TX7

E3AC

R F

O A

ESD jack

AC power tray

Power switch/ circuit breaker

I/O access

cards

2-6 LightStream 2020 Installation Guide

Console/

modem

assemblies

I/O access

cards

Power inlet

H4811

NP access

card

Wiring a DC-Powered System

The procedure in this section explains how to wire a DC-powered LS2020 switch to a DC power source. This task should be performed only by qualiﬁed service personnel or a licensed electrician.

This section applies only to systems with the DC power option. If you have a standard AC-powered system, skip to the section “Installing Fantails.”

For general information on DC-powered LS2020 systems, see the LightStream 2020 Hardware

Reference and Troubleshooting Guide. For power speciﬁcations, see the LightStream 2020 Site Planning and Cabling Guide.

Preparation for Wiring

Note the following in preparation for wiring a DC-powered LS2020 switch:

• The system power connection on the DC power tray is provided by a 3-position terminal block,

as shown in Figure 2-3. The –48, –48RTN, and CHS GND connections providing –48VDC power to the system require a minimum of number10AWG wire for the 24A-rated load. The terminal block is rated to accept up to number 8AWGsolid wire. The use of ferrules to terminate these wires is recommended.

• The alarm circuit connection to the DC power tray is provided by a smaller 3-position terminal

block, also shown in Figure 2-3. The COM, NO, and NC connections providing the circuit breakeralarm indication shouldbe wired with number22AWG or largerwire. The use ofnumber 6 spade or ring lug terminals for these connections is recommended.

Wiring a DC-Powered System

• Obtain a slot-tip screwdriver for securing the system power terminals and a Phillips screwdriver

for securing the alarm circuit terminals.

Installing a LightStream 2020 Switch 2-7

Wiring a DC-Powered System

Figure 2-3 Connections to DC-powered Chassis

Terminal block for alarm circuit

Wiring Procedure

Warning The wiring task should be performed only by a licensed electrician or qualiﬁed service

personnel. Untrained personnel may be exposed to hazardous DC voltages.

Removable cover

Terminal block for system power

Circuit breaker/ power switch

H3690

To wire a DC-powered LS2020 switch to a DC power source, perform the following steps:

Step 1 Ensure that the circuit breaker/power switch on each DC power tray is OFF. Step 2 Ensure that power to the circuit to which you will connect the LS2020 switch is OFF. Step 3 Connect the three system power wires to the LS2020 terminal block, using the slot-tipped

screwdriver to secure the terminals. Do not remove the terminal covers at the base of the terminal block.

Step 4 To connect the alarm circuit, remove the plastic terminal block cover (see Figure 2-3) and

set it aside for the time being.

Step 5 Connect the alarm wires to the LS2020 terminal block, using the Phillips screwdriver to

secure the terminals.

Step 6 Replace the terminal block cover.

2-8 LightStream 2020 Installation Guide

Step 7 Repeat the procedure above if the LS2020 switch contains a second DC power tray. Step 8 Observe the green power LED on the front of the power tray when power is applied. If the

LED is not lit, check for incorrectly connected wires or problems in the DC power source.

Installing Fantails

This section explains how to mount and connect fantails in your LS2020 switch (see Figure 2-4). Fantailsprovide connectors for data cables on low-speed (V.35,X.21 and RS-449) lines and T3 lines that are attached to cell line card/T3 access cards in an LS2020 switch.

If your system has no low-speed or cell line card/T3 modules, skip to the section “Attaching Data Cables.”

Note RS-449 refers to a popular physical layer interface standard that is now called EIA/TIA-449.

However, to avoid confusion in this document, the “RS-449” nomenclature will be retained when describing the components and capabilities of an LS2020 switch.

Required Tools and Equipment

Obtain the following equipment and tools in preparation for installing fantails:

Installing Fantails

• Fantails in the desired quantity (provided by Cisco Systems).

• Required fantail cables (provided by Cisco Systems).

• Fantail mounting screws,clip nuts, and washers (provided by Cisco Systems).If your equipment

rack has metric-threaded rails, you must provide appropriate mounting screws.

• A 5/16-inch slotted-tip screwdriver.

• Adhesive labels for making appropriate notations on each fantail.

• A grounding wrist strap for ESD protection during fantail installation.

Note If you are installing X.21 fantails and you plan to conﬁgure the ports as DTEs, you must

obtain and install a 15-pin male-to-male gender converteron each port in order to change the female connector to a male connector. Note, however, that the gender converters are not required for X.21 ports conﬁgured as DCEs.

Installing a LightStream 2020 Switch 2-9

Installing Fantails

Figure 2-4 Fantail Cable Connections

Low-speed access card

V.35 fantail

Front view

Rear view

H3691

RS-449 fantail

Fantail Installation Procedure

To install fantails in your LS2020 switch, perform the following steps:

Note Before installing fantails, check the interface jumpers on each low-speed access card. These

jumpers must be set to the interface displayed on the fantail(s) for that card. For instructions on setting interface jumpers, see the LightStream2020 Hardware Reference & TroubleshootingGuide.

Rear view

Front view

100-pin high-density connectors support four ports each

Step 1 Select a position on the rack to mount the fantail. Attach the four clip nuts provided with

the fantail to the appropriate holes in the rails.

Step 2 Put on the ESD wrist strap and connect it to the ESD jack on the rear of the LS2020 chassis.

2-10 LightStream 2020 Installation Guide

Attaching Data Cables

Step 3 Attach the fantail cable(s) to the back of the fantail and the corresponding access card in

the chassis. (Performing this task now is recommended, rather than installing the fantail ﬁrst and having to reach behind it to attach the cable(s) to a connector that you cannot observe directly.) Note that the cable is reversible; that is, either end of the cable can be connected to the fantail. Exercise care to avoid suspending the weight of the fantail on the cable.

Step 4 Attach the fantail to the rails with the mounting screws and washers provided, using a

slot-tip screwdriver.

Step 5 Label the fantail with the slot number or the name of the interface module to which the

fantail is connected.

Step 6 Repeat Step 1 and Steps 3 through 5 to install additional fantails in your LS2020 switch.

Note If you are mounting an X.21 fantail, set the DTE/DCE switches for each port to the desired

mode.(See the LightStream 2020 HardwareReferenceandTroubleshooting Guide for moredetailed instructions on conﬁguring X.21 ports as DTEs or DCEs.) If you select a DCE interface, note that you must install a gender converter on each DTE port in order to change the female connector to a male connector.

Attaching Data Cables

To attach data cables to your LS2020 switch, perform the following steps:

Step 1 If you have any FDDI cards in your LS2020 switch, install connector keys provided by the

cable vendor onto your FDDI cables. The keys make it impossible to attach a cable to the wrong kind of connector on the FDDI card.

Step 2 If you have any OC-3c or FDDI cards in your LS2020 switch, remove and save the

protective covers on the ports that will be used. Leave any unused ports covered.

Step 3 If you have any E1 CEMAC cards (circuit emulation access cards) in your LS2020 switch,

check the user-settable jumper settings on the card(s). These jumpers allow you to select termination impedance and grounding on the receive line, as well as the pulse amplitude and grounding on the transmit line.

As default values, the termination impedance and pulse amplitude jumpers are set to 120 ohms, and the transmit and receive lines are not grounded. Use these default settings if you plan to use the E1 CEMAC card without a fantail. However, if you do plan to use a fantail (which provides 75-ohm interfaces), you must use 75-ohm settings for termination impedance and pulse amplitude and set grounding to on.

For more detailed information about changing the E1 CEMAC card jumper settings, consult the LightStream 2020 Hardware Reference and Troubleshooting Guide.

Step 4 Connect any available external data cables. (Refer to the LightStream 2020 Site Planning

and Cabling Guide fordetails about data cablesand connectors.) If youhaveEthernetcards

inyour LS2020 switch, notethateach card supports onlyeightports (0 through 7),although 10 physical connectors are available on the access card. Note also that youcan use onlyone of the 10Base-T or AUI connections on ports 0 and 7.

Installing a LightStream 2020 Switch 2-11

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