Table of Contents

Safety Recommendations

Ensuring Safety with Electricity
Preventing Electrostatic Discharge Damage

Preparing for Network Connections
Connecting the Route Processor to a Network

Ethernet Port Connections
Console Port Connections

Connecting Interface Modules to a Network

Distance Limitations
UTP Connections
Fiber-Optic Connections

Preparing for Installation and Network Connections

This chapter describes how to prepare for connecting cables to the route processor, switch processors, and interface modules. It includes the following sections:

• Safety Recommendations

• Preparing for Network Connections

• Connecting the Route Processor to a Network

• Connecting Interface Modules to a Network

Warning Before you install, operate, or service the system, read the Site Preparation and Safety Guide. This guide contains important safety information you should know before working with the system.

Safety Recommendations

Follow these safety recommendations to ensure your safety and to protect the equipment:

• Keep the chassis area clear and free of dust during and after installation procedures.

• Keep tools and chassis components away from walk areas.

• Fasten your tie or scarf and roll up your sleeves. Do not wear loose clothing, jewelry (including rings and chains), or other items that could get caught in the chassis.

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.

Ensuring Safety with Electricity

The interface modules and redundant (second) power supplies are designed for removal and replacement while the system is operating without presenting an electrical hazard or causing damage to the system.

Follow these guidelines when working with any electrical equipment:

• Never install equipment that appears to be damaged.

• Do not begin any procedures requiring access to the chassis interior before locating the emergency off switch for the room in which you are working.

• Do not work alone when potentially hazardous conditions exist.

• Never assume that power is disconnected from a circuit; always check.

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Warning Before working on a system that has an on/off switch, turn off the power and unplug the power cord.

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Warning This unit might have more than one power cord. To reduce the risk of electric shock, disconnect the two power supply cords before servicing the unit.

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• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.

• Do not begin any procedure before carefully examining your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

In addition, use the guidelines that follow when working with any equipment that is disconnected from a power source but still connected to telephone wiring or other network cabling.

• Use caution when installing or modifying telephone lines.

• 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 is disconnected at the network interface.

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

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Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which occurs when electronic cards or components are improperly handled, can result in complete or intermittent failures. The route processor and interface modules each consist of a printed circuit card that is fixed in a metal carrier. EMI shielding and connectors are integral components of the carrier. Although the metal carrier helps to protect the cards from ESD, use a preventive antistatic strap whenever you handle the route processor, switch processors, or interface modules. Handle the modules by the edges only; never touch the cards or connector pins.

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Caution Always tighten the captive installation screws on the route processor, switch processors, and interface modules when you are installing them. These screws prevent accidental removal of the route processor, switch processors, and interface modules, provide proper grounding for the system, and help to ensure that the bus connectors are properly seated in the backplane.

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Follow these guidelines for preventing ESD damage:

• Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact.

• Always handle modules by the faceplates and carrier edges only; avoid touching the card or any connector pins.

• Always connect the equipment end of the strap to one of the captive installation screws on an installed interface module or power supply before removing any module. (See Figure 2-1.)

• Always place the removed module component side up on an antistatic surface or in a static-shielding bag. If the module is to be returned to the factory, immediately place it in a static-shielding bag.

• Always avoid contact between the modules and clothing. The wrist strap protects only the card from ESD voltages on the body; ESD voltages on clothing can still cause damage.

Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohms (Mohm).

Preparing for Network Connections

When preparing your site for network connections to the Catalyst 8540 CSR chassis, consider these factors for each type of interface:

• Cabling required for each type (see Table 2-1)

• Distance limitations for each signal type (see Table 2-2)

• Additional interface equipment needed

Before installing the component, have all additional external equipment and cables on hand.

Note   The unshielded twisted-pair (UTP) port on the Catalyst 8540 CSR 10/100BaseT interface module is an RJ-45 receptacle. If you intend to build your own cables, see the "Ethernet Cable Connector Pinouts" section for a list of the RJ-45 cable connector pinouts.

Connecting the Route Processor to a Network

This section describes how to connect the route processor to a network.

Before making the connections, have all additional external equipment and cables on hand. For ordering information, contact a customer service representative. To build your own cables, see the cable pinouts in "Cable and Port Pinouts."

Ethernet Port Connections

Use a straight-through Ethernet cable with RJ-45 male connectors (see Figure 2-2) between the Ethernet port and an Ethernet network. The "Ethernet Cable Connector Pinouts" section lists the Ethernet cable connector pinouts.

Console Port Connections

The route processor includes an EIA/TIA-232, DCE console port (see Figure 2-3). This port provides access to the device either remotely (with a data terminal equipment [DTE] connection) or locally (with a console terminal). This section describes important cabling information to consider before connecting a console terminal (an ASCII terminal or PC running terminal emulation software) to the console port.

EIA/TIA-232 supports unbalanced circuits at signal speeds of up to 64 kbps. Figure 2-4 shows the connectors at the network end of the adapter cable for DTE and DCE connections.

The console port on the route processor is a female, EIA/TIA-232, DCE,
DB-25 receptacle. Both data set ready (DSR) and data carrier detect (DCD) activate when the system is running. The Ready To Send (RTS) signal tracks the state of the Clear To Send (CTS) input. The console port does not support modem control or hardware flow control. The console port requires a straight-through
EIA/TIA-232 cable.

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Note   The console port is an asynchronous serial port; any device connected to this port must be capable of asynchronous transmission. (Asynchronous devices are the most common type of serial device.)

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Before connecting to the console port, check your terminal's documentation to determine the baud rate. The baud rate of the terminal must match the default baud rate (9600 baud) of the port you use. Set up the terminal as follows:

• 9600 baud

• 8 data bits

• No parity

• 1 stop bit

Connecting Interface Modules to a Network

This section contains information on cabling the Catalyst 8540 CSR interface modules. When your Catalyst 8540 CSR leaves the factory, it is configured as specified in your order and is ready for installation and startup. As your network requirements change, you might want to upgrade your system, add components, or change the initial configuration.

Table 2-1 lists the cable types for the interface modules available for the Catalyst 8540 CSR.

Table 2-1: Interface Module Cable Types

Interface Module	Cable Type	Connection Type	Number of Ports
Eight-port Gigabit Ethernet	Multimode fiber	SC-type	8 fiber ports
Two-port Gigabit Ethernet	Multimode fiber	SC-type	2 fiber ports
Two-port enhanced Gigabit Ethernet	Multimode fiber	SC-type	2 fiber ports
10/100BaseT	Category 5 UTP	UTP RJ-45	16 UTP ports
100BaseFX	Multimode fiber	MT-RJ	16 fiber ports
Packet-over-SONETOC-12c uplink with enhanced gigabit ethernet	Multimode for Gigabit Ethernet or single-mode fiber for POS	SC-type	2 fiber ports
ATM OC-12c and OC-3c uplink with enhanced gigabit ethernet	Multimode or single-mode fiber	SC-type	2 fiber ports

All Catalyst 8540 CSR interfaces are bidirectional. Figure 2-5 shows the interface module network connections and LEDs.

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Note   To connect a Catalyst 8540 CSR chassis to a router (such as the Cisco 7500 router) with a UTP cable, use a straight-through cable. To connect the chassis to a switch (such as the Catalyst 5500 switch), use a crossover cable.

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The LEDs on the faceplate of the interface modules provide status information for the individual interface connections of the interface modules. See the "Interface Module LEDs" section for more LED information.

Distance Limitations

The length of your networks and the distances between connections depend on the type of signal, the signal speed, and the transmission media (the type of cabling used to transmit the signals). For example, multimode fiber-optic cable has a greater channel capacity than UTP cabling.

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Note   The distances and rate limits in this chapter are the IEEE-recommended maximum speeds and distances for signaling. However, you can get good results at speeds and distances far greater than these if you understand and can compensate for the electrical problems that might arise. Do this at your own risk.

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The following distance limits are provided as guidelines for planning your network connections before installation.

Networking standards set recommended maximum distances between stations using fiber-optic and UTP cable. Table 2-2 lists the recommended maximum cable lengths.

Table 2-2: Maximum Transmission Distances

Transceiver Speed	Cable Type	Maximum Distance Between Stations
10/100 Mbps	Category 5 UTP	328 ft (100 m)
100 Mbps	Multimode fiber	1640 ft (500 m)
622 Mbps	Single-mode fiber intermediate reach	9 miles (15 km)
622 Mbps	Single-mode fiber long reach	25 miles (40 km)
622 Mbps	Multimode fiber	1640 ft (500 m)
1000 Mbps	Multimode fiber	1640 ft (500 m)
1000 Mbps	Single-mode fiber	16,404 ft (5000 m)

UTP Connections

For 10-Mbps or 100-Mbps UTP traffic, use the RJ-45 connector (see Figure 2-6) to connect the interface modules with the external switch.

Fiber-Optic Connections

For 100-Mbps fiber-optic traffic, use the MT-RJ connector to connect the interface modules with the external network. Figure 2-7 shows the fiber-optic connector (MT-RJ).

For 1000-Mbps fiber-optic traffic, use the SC-type connector to connect the Gigabit Ethernet interface modules with the external network. Figure 2-8 shows this connector.

Posted: Mon Sep 18 10:44:23 PDT 2000
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