Installation in a Hazardous Environment

This chapter describes how to install your switch in a hazardous environment, to interpret the power-on self-test (POST), and to connect the switch to other devices. Read these topics, and perform the procedures in this order:

Preparing for Installation

Warnings

Warning This equipment is to be installed and maintained by service personnel only as defined by AS/NZS 3260 Clause 1.2.14.3 Service Personnel. Statement 88

Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 49

Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017

Warning Read the installation instructions before you connect the system to its power source. Statement 1004

Warning Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage. Statement 48

Warning Do not disconnect connections to this equipment unless power has been removed or you have verified that the area is nonhazardous. Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.

Substitution of components may impair suitability for Class I, Division 2. Statement 1062

Warning When you connect or disconnect the power and relay connector with power applied, an electrical arc can occur. This could cause an explosion in hazardous area installations. Be sure that power is removed from the switch and alarm circuit. Be sure that power cannot be accidentally turned on or verify that the area is nonhazardous before proceeding.

Failure to securely tighten the power and relay connector captive screws can result in an electrical arc if the connector is accidentally removed. Statement 1058

Warning Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements in IEC 60950 based safety standards. Statement 1033

Warning The nominal voltage for this product is 24 V. When the switch is installed in hazardous locations, the safe operating range of 18 to 30 VDC must be maintained. Statement 1060

Warning The switch relays are rated at 1 Amp and have a voltage limit of 30 VDC and 0.3 Amp at a voltage limit of 125 VAC. It is dangerous to exceed these limitations in a hazardous environment.

An electrical arc can occur when you connect or disconnect the relay wires with field side power applied. This could cause an explosion in switch installations in a hazardous location. Before proceeding, be sure that power is removed or the area is not hazardous. Statement 1061.

Warning This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), and at altitudes up to 2000 meters without derating. Statement 1068

Warning This equipment is supplied as "open type" equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool.

The enclosure must meet IP 54 or NEMA type 4 minimum enclosure rating standards. Statement 1063

Warning Use twisted-pair supply wires suitable for 86�F (30�C) above surrounding ambient temperature outside the enclosure. Statement 1067

Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the power and relay connector. Statement 122

Warning In switch installations in a hazardous location, the DC power source could be located away from the vicinity of the switch. be sure that power is removed and power cannot be accidentally be turned on or the area is nonhazardous before proceeding. Statement 1059

Warning If you connect or disconnect the console cable with power applied to the switch or any device on the network, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.

To verify switch operation, perform POST on the switch in a nonhazardous location before installation. Statement 1065

Warning Do not connect or disconnect cables to the ports while power is applied to the switch or any device on the network because an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed from the switch and cannot be accidentally be turned on, or verify that the area is nonhazardous before proceeding. Statement 1070

Warning To prevent the switch from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of 140�F (60�C). To prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings. Statement 17C

Warning When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method, for all power, input and output wiring, that complies with the governing electrical codes and in accordance with the authority having jurisdiction over Class I, Division 2 installations. Statement 1066

Warning When installing the unit, always make the ground connection first and disconnect it last. Statement 42

Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. Statement 39

Warning This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure that the switch functional ground lug is connected to earth ground during normal use. Statement 1064

Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43


Warning	To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety: •This unit should be mounted at the bottom of the rack if it is the only unit in the rack. •When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack. •If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 140

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001

Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 180

Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051

Warning For diverging beams, viewing the laser output with certain optical instruments within a distance of 100 mm may harm your eyes. For collimated beams, viewing the laser output with certain optical instruments designed for use at a distance may harm your eyes. Statement 282

EMC Regulatory Statements

This section includes specific regulatory statements about the Catalyst 2955 family of switches.

U.S.A.

U.S. regulatory information for this product is in the front matter of this manual.

Class A Notice for Taiwan and Other Traditional Chinese Markets


Warning	This is a Class A Information Product, when used in residential environment, it may cause radio frequency interference, under such circumstances, the user may be requested to take appropriate countermeasures. Statement 257

VCCI Class A Notice for Japan


Warning	This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions. Statement 191

Class A Warning for Korea


Warning	This is a Class A Device and is registered for EMC requirements for industrial use. The seller or buyer should be aware of this. If this type was sold or purchased by mistake, it should be replaced with a residential-use type. Statement 294

Class A Warning for Hungary


Warning	This equipment is a class A product and should be used and installed properly according to the Hungarian EMC Class A requirements (MSZEN55022). Class A equipment is designed for typical commercial establishments for which special conditions of installation and protection distance are used. Statement 256

European Zone 2 Certification

This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC. Underwriters Laboratory International DEMKO certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in potentially explosive atmospheres, given in Annex II to this Directive. Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 50021 (1999).

Installation Guidelines

•

For 10/100 ports and 10/100/1000 ports, the cable length from a switch to an attached device cannot exceed 328 feet (100 meters).

•

For 100BASE-FX multimode fiber-optic (MM) ports, the cable length from a switch to an attached device cannot exceed 6562 feet (2 kilometers).

•

For 100BASE-LX single-mode fiber-optic (SM) ports, the cable length from a switch to an attached device cannot exceed 9.375 miles (15 kilometers).

–

Front-panel direct current (DC) power and relay connector is within reach of the connection to the DC circuit breaker.

•

Airflow around the switch and through the vents is unrestricted. To prevent the switch from overheating, there must be a minimum of 3 inches between any other device and the top, bottom, or sides of the switch.

Note

When the switch is installed in an industrial enclosure, the temperature within the enclosure is greater than normal room temperature outside the enclosure.

The temperature inside the enclosure cannot exceed 140oF (60oC), the maximum ambient enclosure temperature of the switch.

•

Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting fixtures.

Verifying Package Contents

Note

Carefully remove the contents from the shipping container, and check each item for damage. If any item is missing or damaged, contact your Cisco representative or reseller for support. Return all packing materials to the shipping container and save them.

Note

To connect the switch functional ground, you need a ring terminal lug (such as Thomas & Bett part number RC10-14 or equivalent).

If you want to connect a terminal to the switch console port, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with that adapter from Cisco.

For multimode (MM) connections, you can connect a 100BASE-FX port to a port on a target device by using one of the MT-RJ fiber-optic patch cables listed in Table B-1 on page B-3. Use the Cisco part numbers in Table B-1 to order the patch cables that you need.

For single-mode (SM) connections, you can connect a 100BASE-LX port to a port on a target device by using one of the connectors listed in Table B-2 on page B-4. Use the Cisco part numbers in Table B-2 to order the patch cables that you need.

Applying the Switch Protective Liner

The switch ships with a protective liner that prevents debris from falling into the switch ventilation holes during installation. Before installing the switch on a DIN rail or in a 19-inch rack, connecting the switch to a power source, or wiring the external alarm device relays, you must first apply the protective liner.

Because the protective liner covers ventilation holes on the switch, the liner must be removed from the switch before power is applied to allow proper airflow through the switch chassis.

•

If you are installing the switch in a parallel mounting position, apply the protective liner to the switch top panel.

•

If you are installing the switch in a face-down mounting position, apply the protective liner to the switch rear panel.

Verifying Switch Operation

Before installing the switch on a DIN rail or in a 19-inch rack, you should power on the switch and verify that the switch passes power-on self-test (POST). These sections describe the steps required to connect a PC to the switch console port, to power on the switch, and to observe POST:

Connecting a PC or a Terminal to the Console Port

To connect a PC to the console port, use the supplied RJ-45-to-DB-9 adapter cable. To connect a terminal to the console port, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with that adapter from Cisco. For console-port and adapter-pinout information, see the "Cable and Adapter Specifications" section on page B-5.

The PC or terminal must support VT100 terminal emulation. The terminal-emulation software—frequently a PC application such as HyperTerminal or Procomm Plus—makes communication between the switch and your PC or terminal possible during the setup program.

Step 1

Make sure that your terminal-emulation software is configured to communicate with the switch through hardware flow control.

Step 2

Configure the baud rate and data format of the PC or terminal to match these console-port default characteristics:

After gaining access to the switch, you can change the port baud rate. Refer to the switch software configuration guide for instructions.

Powering On the Switch and Running POST

1	Console cable

These sections describe the steps required to power on the switch and to observe POST:

Locate the power and relay connector, the ferrite, and the switch installation protective liner in the switch kit.

•

Ratcheting torque flathead screwdriver that exerts up to 15 inch pounds (in-lbs.) of pressure

•

Crimping tool (such as Thomas & Bett part number WT2000 , ERG-2001, or equivalent)

•

10- to 12-gauge copper ground wire (such as Belden part number 9912 or equivalent)

•

Four leads of 18-gauge copper wire, UL and CSA rated, style 1007 or 1569 twisted-pair copper appliance wiring material (AWM) wire (such as Belden part number 9318)

Grounding the Switch

Warning When installing the unit, always make the ground connection first and disconnect it last. Statement 42

Caution

To make sure that the equipment is reliably connected to earth ground, follow the grounding procedure instructions, and use a UL-listed ring terminal lug suitable for number-10 to 12 AWG wire, such as Thomas & Bett part number RC10-14 or equivalent.

To ground the switch to earth ground by using the functional ground screw, follow these steps. Make sure to follow any grounding requirements at your site.

Step 1

Use a standard Phillips screwdriver or a ratcheting torque screwdriver with a Phillips head to remove the ground screw from the front panel of the switch. Store the ground screw for later use.

Step 2

If your ground wire is insulated, use a wire stripping tool to strip the 10- to 12-gauge ground wire to 0.5 inch (12.7 millimeter [mm]) � 0.02 inch (0.5 mm) as shown in Figure 4-2.


1	0.5 inch (12.7 mm) � 0.02 inch (0.5 mm)	3	Wire lead
2	Insulation

Step 3

Insert the ground wire into the ring terminal lug, and using a crimping tool, crimp the ring terminal to the wire.

Step 5

Insert the ground screw into the functional ground screw opening on the front panel.

Step 6

Using a ratcheting torque screwdriver, tighten the ground screw and ring terminal lug to the switch front panel to 15 in-lbs. (240 ounce-force inches [ozf-in.]), as shown in Figure 4-4.

1	Grounding cable

Step 7

Attach the other end of the ground wire to a grounded bare metal surface, such as a ground bus, a grounded DIN rail, or a grounded bare rack.

Wiring the DC Power Source

Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 49

Warning When you disconnect the power and relay connector with power applied to the switch, an electrical arc can occur. This could cause an explosion in hazardous area installations. Be sure that power is removed from the switch and cannot be accidentally be turned on, or verify that the area is nonhazardous before proceeding.

Failure to securely tighten the power and relay connector captive screws can result in an electrical arc if the connector is accidentally removed. Statement 1058

Warning Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements in IEC 60950 based safety standards. Statement 1033

Caution

You must connect the Catalyst 2955 switch only to a DC-input power source that has an input supply voltage from 18 to 32 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

Note

For wire connections to the power and relay connector, you must use UL and CSA rated, style 1007 or 1569 twisted-pair copper appliance wiring material (AWM) wire (such as Belden part number 9318).

You must also use the ferrite that ships with the switch.

Step 2

Identify the positive and return feed positions for the power and relay connector. The positive DC power connection from power supply A is labeled VA, and the return is the adjacent connection labeled RT. The positive DC power connection from power supply B (the redundant power supply) is labeled VB, and the return is the adjacent connection labeled RT.

Step 3

Measure two strands of twisted-pair copper wire (18 to 20 AWG) long enough to connect to the DC power source.

Step 4

Using an 18-gauge wire-stripping tool, strip each of the two wires coming from each DC-input power source to 0.25 inch (6.3 mm) � 0.02 inch (0.5 mm). Do not strip more than 0.27 inch (6.8 mm) of insulation from the wire. Stripping more than the recommended amount of wire can leave exposed wire from the power and relay connector after installation.

1	0.25 in. (6.3 mm) � 0.02 in. (0.5 mm)

Step 5

Insert the exposed DC-input power source wires into the power and relay connector, as shown in Figure 4-7. Make sure that you cannot see any wire lead. Only wire with insulation should extend from the connector.


1	Power supply A positive connection	5	External device 2, relay wire B connection
2	Power supply A return connection	6	External device 1, relay wire B connection
3	External device 1, relay wire A connection	7	Power supply B return connection
4	External device 2, relay wire A connection	8	Power supply B positive connection

Step 6

Use a ratcheting torque flathead screwdriver to torque the power and relay connector captive screws (above the installed wire leads) to 4.5 in-lbs. (72 ozf-in.). (See Figure 4-8.)

1	Power and relay connector captive screws

Step 7

Connect the other end of the wire connected to VA to the positive pole on the DC power source, and connect the other end of the wire connected to RT to the return pole on the DC power source.

Note

If you are connecting a second power supply, repeat Step 4 through Step 7 for the DC-input (VB) and return (RT) for power supply B.

Figure 4-9 shows the completed DC-input wiring on a power and relay connector for a primary power supply and an optional secondary power supply.


1	Power supply A positive connection	5	External device 2, relay wire B connection
2	Power supply A return connection	6	External device 1, relay wire B connection
3	External device 1, relay wire A connection	7	Power supply B return connection
4	External device 2, relay wire A connection	8	Power supply B positive connection

Add the Ferrite to the Power and Relay Connector Wiring

Before you connect the power and relay connector to the front panel, follow these steps to add a ferrite to the power and relay connector wiring.

Step 1

Position the opened ferrite around the wiring within 3 inches of the power and relay connector.

Step 3

Press the ferrite closed until the clasp snaps shut (see Figure 4-11).

Attach the Power and Relay Connector to the Switch

Follow these steps to attach the power and relay connector to the front panel of the switch.

Step 1

Insert the power and relay connector into the power and relay connector receptacle on the switch front panel (see Figure 4-11).

Step 2

Use a flathead screwdriver to tighten the captive screws on the sides of the power and relay connector.

Caution

Secure the wires coming from the power and relay connector so that they cannot be disturbed by casual contact. For example, use tie wraps to secure the wires to the rack.

Power On the Switch

Locate the circuit breaker on the panel board that services the DC circuit, and switch the circuit breaker to the ON position.

Running POST

After the power is connected, the switch automatically begins POST, a series of tests that verifies that the switch functions properly.

1	Power and relay connector

Note

The uplink port status LEDs provide system and status information during POST. On the Catalyst 2955C-12 and 2955S-12, the uplink ports are labeled 13 and 14. On the Catalyst 2955T-12, the uplink ports are labeled 1 and 2.

While the switch powers on, the power status LEDs are green or red, showing the presence or absence of power supplies (see Table 2-1 on page 2-13 for details). During POST, the power status LEDs are green. After POST completes successfully, the power status LEDs are green if both power supplies are functioning normally and the switch has been configured to operate in dual-power mode.

If the switch is in single-power mode and only power supply A is present and functioning, the LED for power supply B is green, and the LED for power supply A shows its status. If the switch is in single-power mode and only power supply B is present and functioning, the LED for power supply A is green, and the LED for power supply B shows its status.

Refer to the switch configuration guide for details on single- and dual-power mode operation.

On a Catalyst 2950 switch, you can use the MODE button to recover the switch password. The Catalyst 2955 switch has no MODE button, so the boot loader compensates by using break key detection to stop the automatic boot sequence for password recovery.

On the Catalyst 2955C-12 and 2955S-12 switches, during the initial appearance of the boot loader prompt on the console after POST, uplink port 13 LED blinks green, and uplink port 14 LED is off. On the Catalyst 2955T-12 switch, during the initial appearance of the boot loader prompt on the console after POST, uplink port 1 LED blinks green, and uplink port 2 LED is off.

Note

Refer to the switch software configuration guide for details on the Catalyst 2955 switch password recovery process.

Wiring the External Alarm Device Relays

The alarm relays on the Catalyst 2955 switch are normally open (NO). To connect an external alarm device to the relays, you must connect two relay contact wires to complete an electrical circuit. Because each external alarm device requires two connections to a relay, the Catalyst 2955 switch supports a maximum of two external alarm devices.

Note

After you have completed the wiring for the DC power connections, follow these steps to wire the switch to an external alarm device:

Step 1

Measure one strand of twisted-pair wire (18 to 20 AWG) long enough to connect to the external alarm device.

Step 2

Use a wire stripper to remove the casing from both ends of the wire to 0.25 inch (6.3 mm) � 0.02 inch (0.5 mm). Do not strip more than 0.27 inch (6.8 mm) of insulation from the wire. Stripping more than the recommended amount of wire can leave exposed wire from the power and relay connector after installation.

Step 3

Insert the exposed wires for the external alarm device into the two connections labeled A1, as shown in Figure 4-13.


1	Power supply A positive connection	5	External device 2, relay wire B connection
2	Power supply A return connection	6	External device 1, relay wire B connection
3	External device 1, relay wire A connection	7	Power supply B return connection
4	External device 2, relay wire A connection	8	Power supply B positive connection

Step 4

Use a ratcheting torque flathead screwdriver to torque the power and relay connector captive screw (above the installed wire lead) to 4.5 in-lbs. (72 ozf-in.). (See Figure 4-14 for details.)

1	Power and relay connector captive screws

Step 5

Repeat Step 1 through Step 4 to insert the input and output wires of an additional external alarm device into the two connections labeled A2.

Figure 4-15 shows the completed wiring for two external alarm devices on a power and relay connector.

Figure 4-15 Completed Connections for Two External Alarm Devices on the Power and Relay Connector


1	Power supply A positive connection	5	External device 2, relay wire B connection
2	Power supply A return connection	6	External device 1, relay wire B connection
3	External device 1, relay wire A connection	7	Power supply B return connection
4	External device 2, relay wire A connection	8	Power supply B positive connection

Installing the Switch on a DIN Rail

You can mount the Catalyst 2955 switch on a DIN rail in a parallel or a face-down position.

The switch ships with the clip assembly installed on the rear panel for a parallel mounting position, as shown in Figure 4-16. To mount the switch in a face-down position, remove the clip assembly from the rear panel, and install it on the top of the switch, as shown in Figure 4-17.


1	Catalyst 2955 switch rear panel	3	DIN rail clip mounting screws
2	DIN rail clip assembly


1	Catalyst 2955 switch top panel	3	DIN rail clip mounting screws
2	DIN rail clip assembly

Step 1

Position the rear panel of the switch directly in front of the DIN rail, making sure that the top of the DIN rail clip hooks over the top of the DIN rail, as shown in Figure 4-18 and Figure 4-19.


1	DIN rail clip	3	DIN rail clip release tab
2	DIN rail


1	DIN rail clip	3	DIN rail clip release tab
2	DIN rail

Step 2

Rotate the switch down toward the DIN rail until the release tab on the rear panel clicks.

Step 3

Lift lightly on the bottom of the switch to ensure that it is firmly locked in place.

Installing the Switch in a Rack

You can use an optional DIN rail adapter kit (available through Cisco, part number STK-RACKMNT-2955=) to mount the Catalyst 2955 switch in a 19-inch rack. The rack mounting kit comes with a DIN rail adapter and screws to attach the adapter to the rack. Ask your Cisco representative for details.


Warning	To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety: •This unit should be mounted at the bottom of the rack if it is the only unit in the rack. •When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack. •If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006

Step 1

Use the four Phillips machine screws to securely attach the brackets to the rack, as shown in Figure 4-20.

Step 2

Position the rear panel of the switch directly in front of the DIN rail, making sure that the top of the DIN rail clip hooks over the top of the DIN rail, as shown in Figure 4-18 and Figure 4-19.

Step 3

Rotate the switch down toward the DIN rail until the release tab on the rear panel clicks.

Step 4

Lift lightly on the bottom of the switch to ensure that it is firmly locked in place. See Figure 4-21 for details.

Removing the Switch from a DIN Rail or a Rack

Step 1

Ensure that power is removed from the switch, and disconnect all cables and connectors from the front panel of the switch.

Step 2

Push down on the top of the DIN rail clip release tab with your finger. As the clip releases, lift the bottom of the switch, as shown in Figure 4-22 and Figure 4-23.


1	DIN rail clip	3	DIN rail clip release tab
2	DIN rail


1	DIN rail clip	3	DIN rail clip release tab
2	DIN rail

Connecting to 10/100 and 10/100/1000 Ports

The 10/100 ports on the Catalyst 2955 configure themselves to operate at the speed and duplex settings of attached devices.They operate at 10 or 100 Mbps in half- or full-duplex mode. If the attached devices do not support autonegotiation, you can set the speed and duplex parameters.

The 10/100/1000 ports configure themselves to operate at the speed setting of attached devices. These ports on the Catalyst 2955T-12 operate at either 10 or 100 Mbps in either full- or half-duplex mode or at 1000 Mbps in full-duplex mode. If the attached devices do not support autonegotiation, you can set the speed parameter.

Connecting devices that do not autonegotiate or devices with manually set speed and duplex parameters can reduce performance or result in link failures between the devices. To maximize performance, choose one of these methods for configuring the ports:

•

Let the ports autonegotiate both speed and duplex for 10/100 ports and speed for 10/100/1000 ports.

Caution

Proper ESD protection is required whenever you handle Cisco equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the switch.

Do not touch connectors or pins on component boards. Do not touch circuit components inside the switch. When not in use, store the equipment in appropriate static-safe packaging.

Follow these steps to connect the switch to 10BASE-T, 100BASE-TX, or 1000BASE-T devices:

Step 1

When connecting to servers, workstations, and routers, insert a twisted-pair straight-through cable in a front-panel RJ-45 connector, as shown in Figure 4-24 and Figure 4-25. When connecting to switches or repeaters, insert a twisted-pair crossover cable. (See the "Cable and Adapter Specifications" section on page B-5 for cable-pinout descriptions.)

Note

When connecting to 1000BASE-T devices, be sure to use a four twisted-pair, Category 5 cable.

1	Ethernet cable

1	10/100/1000 Ethernet cable

Step 2

Insert the other cable end in an RJ-45 connector on the target device.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while Spanning Tree Protocol (STP) discovers the network topology and searches for loops. This process can take about 30 seconds, and then the LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be a problem with the adapter installed in the target device. See Chapter 5, "Troubleshooting," for solutions to cabling problems.

Connecting to 100BASE-FX MM Ports

You can connect a 100BASE-FX port to a port on a target device by using one of the MT-RJ fiber-optic patch cables listed in Table B-1 on page B-3. Use the Cisco part numbers in Table B-1 to order the patch cables that you need.

Caution

Do not remove the dust plugs from the fiber-optic ports or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the fiber-optic ports and cables from contamination and ambient light.

Step 1

Remove the dust plugs from the 100BASE-FX port, as shown in Figure 4-26, and store them for future use. Remove the rubber caps from the MT-RJ patch cable. Store them for future use.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process can take about 30 seconds, and then the port LED turns green.

1	Fiber-optic uplink cable

Connecting to 100BASE-LX SM Ports

You can connect a 100BASE-LX port to a port on a target device by using one of the LC fiber-optic patch cables listed in Table B-2 on page B-4. Use the Cisco part numbers in Table B-2 to order the patch cables that you need.

Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051

Caution

Step 1

Remove the dust plugs from the 100BASE-LX port, as shown in Figure 4-28, and store them for future use. Remove the rubber caps from the LC on the fiber-optic cable. Store them for future use.

The LED turns green when the switch and the target device have an established link.

The LED turns amber while STP discovers the network topology and searches for loops. This process can take about 30 seconds, and then the port LED turns green.

1	Fiber-optic uplink cable

Where to Go Next

For information about starting the switch, refer to the release notes for the Catalyst 2955 switch.

For information about configuring the switch, refer to the switch software configuration guide.

Table Of Contents