Cisco Systems LightStream 2020 User Manual

CHAPTER

Hardware Installation

This chapter provides procedures for installing a LightStream 2020 multiservice ATM switch (LS2020 switch) in a networking environment. Installing an LS2020 switch in volv es sev eral tasks in two major categories:

1 Installing the LS2020 switch hardware

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

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

2 Performing basic conﬁguration procedures

The basic conﬁguration tasks for the LS2020 switch are accomplished through conﬁguration scripts provided in this chapter.

Note Refer to the LightStream 2020 Release Notes for important, release-speciﬁc information that

may not appear elsewhere in the LS2020 documentation set.

Unpacking and Inspecting the LS2020 Switch Hardware

When unpacking the LightStream 2020 switch, you should inspect the shipping container contents to ensure the shipment is complete as well as check for damage that may have occurred during shipment.

Step 1 Check the shipping container before removing the LS2020 switch hardware from the

loading dock and 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 and bill of materials.

Step 4 Check the bill of materials against the shipment received.

Hardware Installation 2-1

Installing an LS2020 Switch in Rack

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 Contact your LS2020 vendor if your LS2020 switch has been damaged during shipment.

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 located near the exhaust of other equipment.

• The exhaust is not located 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:

• 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 before you begin with the

installation.

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.

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Installing an LS2020 Switch in Rack

Step 3 Remove the following chassis components to reduce the weight of the system during

installation.

• Blowers (top front and top rear)

• Power supplies (right rear)

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.

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 Hardwar e Refer ence and T r oubleshooting Guidefor 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) before installing the chassis into the rack.

Hardware Installation 2-3

Installing an LS2020 Switch in Rack

Figure 2-1 Front View of LightStream 2020 Chassis

Mounting flanges

Blower (behind cover)

Disk assembly

Disk assembly handle unsafe for lifting!

Disk assembly

LightStream 2020

™

Disk assembly handle unsafe for lifting!

2-4 LightStream 2020 Installation Guide

ESD jack

Line cardsNP card

cards

Slots for mounting screws

(12 places)

H4812

Line cardsSwitch

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

Console/

modem

assemblies

I/O access

cards

Power inlet

H4811

NP access

card

Hardware Installation 2-5

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 po wer 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 number 10AWG wire for the 24A-rated load. The terminal block is rated to accept up to number 8A WG solid 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 breaker alarm indication should be wired with number 22A WG or larger wire. The use of number 6 spade or ring lug terminals for these connections is recommended.

• Obtain a slot-tip screwdri v er for securing the system po wer terminals and a Phillips scre wdri v er

for securing the alarm circuit terminals.

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Figure 2-3 Connections to DC-powered Chassis

Terminal block for alarm circuit

Wiring a DC-Powered System

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 co ver (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.

Hardware Installation 2-7

Installing Fantails

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). Fantails provide connectors for data cables on low-speed (V.35, X.21 and EIA/TIA-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.”

Required Tools and Equipment

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

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

• Required fantail cables (provided by Cisco Systems).

• Fantail mounting screws, clip nuts, and w ashers (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 converter on 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.

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V.35 fantail

Installing Fantails

Figure 2-4 Fantail Cable Connections

Low-speed access card

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 LightStream 2020 Hardware Refer ence & Troubleshooting Guide.

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.

Hardware Installation 2-9

Connecting 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 av oid 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 theLightStream 2020 Hardwar e Reference and T r oubleshooting Guidefor more detailed 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.

Connecting Cables

To connect 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. Ho wever, 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 for details about data cables and connectors.) If you have Ethernet cards

in your LS2020 switch, note that each card supports only eight ports (0 through 7), although 10 physical connectors are available on the access card. Note also that you can use only one of the 10Base-T or AUI connections on ports 0 and 7.

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