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This chapter describes how to prepare your site for the installation of the switch and contains the following sections:
Planning a proper location for the switch and the layout of your equipment rack or wiring closet is essential for successful system operation. You should install the switch in an enclosed, secure area, ensuring that only qualified personnel have access to the switch and control of the environment. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, poor equipment placement can make chassis panels inaccessible and difficult to maintain.
The switch operates as a standalone system mounted in a rack in a secure wiring closet. It requires a dry, clean, well-ventilated, and air-conditioned environment. To ensure normal operation, you must maintain ambient airflow. If the airflow is blocked or restricted, or if the intake air is too warm, an overtemperature condition can occur. The switch environmental monitor can then shut down the system to protect the system components.
To ensure normal operation and avoid unnecessary maintenance, plan your site configuration and prepare your site before installation. After installation, make sure the site maintains an ambient temperature of 0 to 40°C (32 to 104°F). It is essential to keep the area around the chassis as free from dust and foreign conductive material (such as metal flakes from nearby construction activity) as is possible. For a description of the environmental monitor and status levels, see the section "Environmental Monitoring" in Chapter 2, "Switch Description."
Multiple switches can be rack-mounted with little or no clearance above and below the chassis. However, when mounting a switch in a rack with other equipment, or when placing it on the floor near other equipment, ensure that the exhaust from other equipment does not blow into the intake vent of the chassis.
Cooling air is drawn in through the right side of the chassis. Keep the right side clear of obstructions, including dust and foreign conductive material, and away from the exhaust ports of other equipment.
Appendix A, "Specifications," lists the operating and nonoperating environmental site requirements for the switches. To maintain normal operation and ensure high system availability, maintain an ambient temperature and clean power at your site. The environmental ranges listed in Appendix A are those within which the switch will continue to operate; however, a measurement that approaches the minimum or maximum of a range indicates a potential problem. You can maintain normal operation by anticipating and correcting environmental anomalies before they exceed the maximum operating range.
Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location.
This section provides site power requirements for the Catalyst 5000 series switches. You should verify site power prior to installing the switch. Power requirements vary for each Catalyst 5000 series switch--ensure that you verify the site power for the type of switch you are installing. This section consists of the following sections:
Follow these requirements when preparing your site for the switch installation:
Follow these precautions when preparing your site for the switch installation:
Warning Ultimate disposal of this product should be handled according to all national laws and regulations.
Warning Unplug the power cord before you work on a system that does not have an on/off switch.
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Caution Do not mix AC- and DC-input power supplies in the same switch.
The following warning applies to the Catalyst 5500 with AC-input power supplies.
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 20A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors).
The following warning applies to the Catalyst 5002, Catalyst 5000, and Catalyst 5505 with AC-input power supplies.
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors).
The following caution applies to the Catalyst 5500 with DC-input power supplies.
Caution This product relies on protective devices in the building installation for protection against short-circuit overcurrent and earth faults. Ensure that a fuse or circuit breaker no larger than 48 VDC, 45A U.S. and Canada (60 VDC, 35A international) is used on the phase conductor.
The following caution applies to the Catalyst 5002, Catalyst 5000, and Catalyst 5505 with DC-input power supplies.
Caution This product relies on protective devices in the building installation for protection against short-circuit overcurrent and earth faults. Ensure that a fuse or circuit breaker no larger than 48 VDC, 20A U.S. and Canada (60 VDC, 15A international) is used on the phase conductor.
Caution The total maximum load on each AC- or DC-input power circuit must be within the rating of the wiring and breaker. An overload of input power can result if this requirement is not met.
Warning Care must be given to connecting units to the supply circuit so that wiring is not overloaded.
Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages.
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Follow these guidelines when setting up the plant wiring. When planning the location of the new system, consider electromagnetic interface (EMI), the distance limitations for signaling, and connector compatibility.
When wires are run for any significant distance in an electromagnetic field, interference can occur between the field and the signals on the wires:
Each Catalyst 5500 AC-input power supply operating at 120 VAC requires a dedicated 20A service and 20A plug and receptacle.
Use the information in this section to estimate the power requirements and heat dissipation of a Catalyst 5000 series switch based on a given configuration of the switch. The power requirements might be useful for planning the power distribution system needed to support the switch. Heat dissipation is an important consideration for sizing the air conditioning requirements for an installation. The power and heat associated with a Catalyst 5000 series switch varies based upon the following considerations:
Unless otherwise noted, the information in Table 3-1 assumes worst-case conditions. Typical numbers are approximately 30 percent below the numbers listed here. For modules that are not listed in Table 3-1, use the numbers for the WS-X5010 module as a worst-case estimate. See Table 3-2 for a sample calculation of a switch configuration.
| Model Number/ Card Type | DC Output Power (Watts) | AC Input Power (Watts) | Heat Diss. (BTU/HR) | Input Current at 90 VAC (Amps) | Input Current at 120 VAC (Amps) | Input Current at 180 VAC (Amps) | Input Current at 240 VAC (Amps) |
|---|---|---|---|---|---|---|---|
| Catalyst 5000 and 5505 chassis (with fans) | 16 | 42 | 144 | 0.47 | 0.35 | 0.23 | 0.18 |
| Catalyst 5002 chassis (with fans) | 16 | 42 | 144 | 0.47 | 0.35 | 0.23 | 0.18 |
| Catalyst 5500 chassis (with fans) | 50 | 105 | 357 | 1.16 | 0.87 | 0.58 | 0.44 |
| WS-X5005 supervisor, SMF | 44 | 70 | 240 | 0.78 | 0.59 | 0.39 | 0.29 |
| WS-X5006 supervisor, MMF | 38 | 60 | 205 | 0.67 | 0.50 | 0.33 | 0.25 |
| WS-X5009 supervisor, UTP | 43 | 69 | 234 | 0.76 | 0.57 | 0.38 | 0.29 |
| WS-X5010 10BT, 24P, Telco | 59 | 94 | 322 | 1.05 | 0.79 | 0.52 | 0.39 |
| WS-X5011 10BFL, 12P | 47 | 74 | 252 | 0.82 | 0.62 | 0.41 | 0.31 |
| WS-X5012 10BT, 48P, Telco | 45 | 72 | 246 | 0.80 | 0.60 | 0.40 | 0.30 |
| WS-X5013 10BT, 24P, RJ45 | 57 | 90 | 308 | 1.00 | 0.75 | 0.50 | 0.38 |
| WS-X5020 10BT, 4x12RPTR, 48P | 22 | 35 | 120 | 0.39 | 0.29 | 0.20 | 0.15 |
| WS-X5101 FDDI, MMF | 35 | 56 | 191 | 0.62 | 0.46 | 0.31 | 0.23 |
| WS-X5103 CDDI | 35 | 56 | 191 | 0.62 | 0.46 | 0.31 | 0.23 |
| WS-X5104 FDDI, SMF | 37 | 58 | 199 | 0.65 | 0.49 | 0.32 | 0.24 |
| WS-X5111 100BFX, 12P | 70 | 112 | 381 | 1.24 | 0.93 | 0.62 | 0.46 |
| WS-X5113 100BTX, 12P | 63 | 100 | 340 | 1.11 | 0.83 | 0.55 | 0.41 |
| WS-X5114 100BFX, 12P | 63 | 100 | 343 | 1.12 | 0.84 | 0.56 | 0.42 |
| WS-X5153 ATM, 1PHY, UTP | 29 | 46 | 158 | 0.52 | 0.39 | 0.26 | 0.19 |
| WS-X5154 ATM, 1PHY, SMF | 31 | 50 | 170 | 0.55 | 0.41 | 0.28 | 0.21 |
| WS-X5155 ATM, 1PHY, MMF | 30 | 47 | 161 | 0.52 | 0.39 | 0.26 | 0.20 |
| WS-X5156 ATM, 2PHY, UTP | 31 | 49 | 167 | 0.54 | 0.41 | 0.27 | 0.20 |
| WS-X5157 ATM, 2PHY, SMF | 34 | 53 | 182 | 0.59 | 0.44 | 0.30 | 0.22 |
| WS-X5158 ATM, 2PHY, MMF | 32 | 51 | 173 | 0.56 | 0.42 | 0.28 | 0.21 |
| WS-X5201 100BFX, BNDL, 12P | 67 | 106 | 363 | 1.18 | 0.89 | 0.59 | 0.44 |
| WS-X5203 10/100 BTX, BNDL, 12P | 67 | 106 | 363 | 1.18 | 0.89 | 0.59 | 0.44 |
| WS-X5213A 10/100 BTX,12P | 65 | 104 | 355 | 1.15 | 0.87 | 0.58 | 0.43 |
| WS-X5223 100BTX, 3x8RPTR, 24P | 70 | 111 | 378 | 1.23 | 0.92 | 0.62 | 0.46 |
| WS-X5224 10/100 BTX, 24P, RJ45 | 71 | 112 | 384 | 1.25 | 0.94 | 0.62 | 0.47 |
| WS-X5505 supervisor, SMF | 45 | 71 | 243 | 0.79 | 0.59 | 0.40 | 0.30 |
| WS-X5506 supervisor, MMF | 37 | 59 | 202 | 0.66 | 0.49 | 0.33 | 0.25 |
| WS-X5509 supervisor, UTP | 43 | 68 | 232 | 0.75 | 0.57 | 0.38 | 0.28 |
| WS-X5302 RSM | 79 | 126 | 431 | 1.40 | 1.05 | 0.70 | 0.53 |
| Supervisor engine III (estimated worst case)
WS-X5530 | 90 | 143 | 490 | 1.59 | 1.19 | 0.80 | 0.60 |
Table 3-2 provides a sample calculation of power and heat dissipation for the following switch configuration:
| Model Number/ Card Type | DC Output Power (Watts) | AC Input Power (Watts) | Heat Diss. (BTU/HR) | Input Current at 90 VAC (Amps) | Input Current at 120 VAC (Amps) | Input Current at 180 VAC (Amps) | Input Current at 240 VAC (Amps) |
|---|---|---|---|---|---|---|---|
| Catalyst 5500 chassis (with fans) | 50 | 105 | 357 | 1.16 | 0.87 | 0.58 | 0.44 |
| WS-X5010 10BT, 24P, Telco | 178 | 283 | 967 | 3.15 | 2.36 | 1.57 | 1.18 |
| WS-X5213A 10/100BTX, 12P | 262 | 415 | 1419 | 4.62 | 3.46 | 2.31 | 1.73 |
| WS-X5509 supervisor, UTP | 87 | 137 | 469 | 1.53 | 1.14 | 0.76 | 0.57 |
| Total | 490 | 941 | 3212 | 10.45 | 7.84 | 5.23 | 3.92 |
The installation must comply with all applicable codes. In North America, installation must comply with NEC (ANSI/NFPA 70) and CEC (Part 1, C22.1). Installation is approved for use with copper connectors only. Attach the chassis ground M4 pemnuts to the central office or other interior ground system with number 10 to 12 AWG wire (the larger gauge ground wire is used when the switch is further away from the ground location). The chassis uses two threaded M4x.7 chassis ground pemnuts. These M4 pemnuts are intended to be connected directly to the central office or other interior ground systems and are located on the rear of the chassis. The ground chassis M4 pemnuts require M4 bolts and locking hardware, which are not included.
For detailed CO ground installation information, see Chapter 7, "Removal and Replacement Procedures."
This section provides cabling guidelines so you can determine how to build networks using Catalyst 5000 series switches. This section also describes the equipment you will need to connect to network devices.
When preparing your site for cabling to the switch, you need to consider several factors related to each type of switch interface. Use the following sections to determine your cabling requirements:
Before installing the switch, have all cables and any additional interface equipment on hand. If you intend to build your own cables, see the cable pinouts in Appendix B, "Cabling Specifications."
For module-specific network connections, refer to the Catalyst 5000 Series Module Installation Guide.
The network cabling components shown in Figure 3-1 consist of the following:
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). The distance and rate limits in this chapter are the IEEE-recommended maximum speeds and distances for signaling. The following distance limits are provided as guidelines for planning your network connections before installation.
See Table 3-3 for maximum cable distances.
| Transceiver Speed | Cable Type | Duplex Mode | Maximum Distance between Stations |
|---|---|---|---|
| 10 Mbps | Category 3 UTP | Full and half | 328 feet (100 meters) |
| 10 Mbps | Multimode fiber | Full and half | 1.2 miles (2 km) |
| 100 Mbps | Category 5 UTP | Full and half | 328 feet (100 meters) |
| 100 Mbps | Multimode fiber | Full | 1.2 miles (2 km) |
| 100 Mbps | Multimode fiber | Half | 1312 feet (400 meters) |
| 100 Mbps | Single-mode fiber | Full and half | 6.2 miles (10 km) |
| 1000 Mbps | Multimode fiber | Full | 62.5-micron diameter MMF --853 feet (260 meters)
50-micron diameter MMF --1804 feet (550 meters) |
The maximum distances for fiber-optic network connections are determined by the transmitter output power, receiver sensitivity, and type of optical source, as shown in Table 3-4.
| Multimode Fiber | Single-Mode Fiber | |
|---|---|---|
| Transmitter Output Power | -19 to -14 dBm | -14 to -8 dBm |
| Receiver Sensitivity | -32.5 to -14 dBm | -32.5 to -8 dBm |
| Wavelength | 1270 to 1380 nm | 1261 to 1360 nm |
| Optical Source | LED | Laser |
| Maximum Span | 1.2 miles (2 km) | 6.2 miles (10 km) |
The power budget (PB) is the maximum possible amount of power transmitted. The following is an example of multimode power budget calculations with sufficient power for transmission, based on the following variables:
Estimate the power budget as follows:
PB = 11.5 dB - 3 km (1.0 dB/km) - 4 (0.5 dB) - 3 (0.5 dB) - 0.5 dB (HOL) - 1 dB (CRM)
PB = 11.5 dB - 3 dB - 2 dB - 1.5 dB - 0.5 dB - 1 dB
PB = 2.5 dB
The 2.5-dB value indicates that this link would have sufficient power for transmission.
The following example has the same parameters as the previous example, but with a multimode link distance of 4 km:
PB = 11.5 dB - 4 km (1.0 dB/km) - 4 (0.5 dB) - 3 (0.5 dB) - 0.5 dB (HOL) - 1 dB (CRM)
PB = 11.5 dB - 4 dB - 2 dB - 1.5 dB - 0.5 dB - 1 dB
PB = 1.5 dB
The 1.5-dB value indicates that this link would have sufficient power for transmission. However, because of the dispersion limit on the link (4 km x 155.52 MHz > 500 MHz/km), this link would not work with multimode fiber. In this case, single-mode fiber is the better choice.
Statistical models can more accurately determine the power budget than the worst-case method. Determining the link loss with statistical methods requires accurate knowledge of variations in the data link components. Statistical power budget analysis is beyond the scope of this publication. For further information, refer to User-Network Interface (UNI) Forum specifications, ITU-T standards, and your equipment specifications.
Refer to the following publications for more information on determining attenuation and power budget:
The LED used for a multimode transmission light source creates multiple propagation paths of light, each with a different path length and time requirement to cross the optical fiber, causing signal dispersion (smear). HOL results from light from the LED entering the fiber and being radiated into the fiber cladding. A worst-case estimate of power margin (PM) for multimode transmissions assumes minimum transmitter power (PT), maximum link loss (LL), and minimum receiver sensitivity (PR). The worst-case analysis provides a margin of error, although not all the parts of an actual system will operate at the worst-case levels.
See Table 3-5 for maximum cable distances used with the emulation modules.
| Transceiver Type | Maximum Distance between Stations |
|---|---|
| Ethernet and Fast Ethernet | |
| Single-mode | 6.22 miles (10 km) |
| Multimode | 1.2 miles (2 km) |
| Category 5 UTP | 328 feet (100 meters) |
| Coaxial (DS3) | 450 feet (137 meters) |
| Gigabit Ethernet | |
| Multimode | 62.5-micron diameter MMF--853 feet (260 meters)
50-micron diameter MMF--1804 feet (550 meters) |
PB is the maximum possible amount of power transmitted. The following equations list the calculation of the power budget:
PB = PT - PR
PB = -18.5 dBm - 30 dBm
PB = 11.5 dB
The power margin calculation is derived from the power budget and subtracts the link loss, as follows:
PM = PB - LL
If the power margin is positive, the link will work.
Table 3-6 lists the factors that contribute to link loss and the estimate of the link-loss value attributable to those factors.
| Link Loss Factor | Estimate of Link Loss Value |
|---|---|
| Higher-order mode losses | 0.5 dB |
| Clock recovery module | 1 dB |
| Modal and chromatic dispersion | Dependent on fiber and wavelength used |
| Connector | 0.5 dB |
| Splice | 0.5 dB |
| Fiber attenuation | 1 dB/km |
After calculating the power budget minus the data link loss, the result should be greater than zero. Results less than zero can indicate insufficient power to operate the receiver.
Table 3-7 lists the link attenuation and dispersion limits for a typical fiber-optic link.
| Single-Mode | Multimode | |
|---|---|---|
| Attenuation | 0.5 dB | 1.0 dB/km |
| Dispersion limit | No limit | 500 MHz/km1 |
As with all signaling systems, serial signals can travel a limited distance at any given bit rate; generally, the slower the baud rate, the greater the distance. Table 3-8 shows the standard relationship between baud rate and distance for EIA/TIA-232 signals.
| Rate (bps) | Distance (feet) | Distance (meters) |
|---|---|---|
| 2400 | 200 | 60 |
| 4800 | 100 | 30 |
| 9600 | 50 | 15 |
| 19,200 | 25 | 7.6 |
| 38,400 | 12 | 3.7 |
| 56,000 | 8.6 | 2.6 |
Ethernet transceivers are available from a variety of sources for UTP and multimode fiber-optic cabling (100BaseFX at 100 Mbps). Figure 3-2 shows an example of Fast Ethernet transceivers and connection equipment.
You might need additional data communications equipment to complete your installation.
When planning your connections, consider the types and locations of connectors on adjacent switching modules to avoid overlapping the transceiver and impairing access to other connections.
Table 3-9 lists the site planning activities that you should perform prior to installing the Catalyst 5000 series switch. Completing each activity helps ensure a successful switch installation.
| Task No. | Planning Activity | Verified By | Time | Date |
|---|---|---|---|---|
| 1 | Space Evaluation:
Space and layout | |||
| 2 | Environmental Evaluation:
Ambient temperature | |||
| 3 | Power Evaluation:
Input power type | |||
| 4 | Grounding Evaluation:
Circuit breaker size | |||
| 5 | Cable and Interface Equipment Evaluation:
Cable type | |||
| 6 | EMI Evaluation:
Distance limitations for signaling |
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