Review Catalyst Switch Cable, Connector, & AC Power Cord Guide

Introduction

This document describes the care and use of Catalyst switch equipment including cables, connectors, power supplies, and cords.

Prerequisites

Requirements

You must identify the part or model number of your switch/supervisor, switching module, or power supply in order to use this document effectively. Do this by visual inspection, or issue the show module command where possible.

Components Used

This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

Conventions

Refer to Cisco Technical Tips Conventions  for more information on document conventions.

Background Information

This document is a guide to cables and connectors for Catalyst 6500/6000, 5500/5000, and 4500/4000 series switching modules and Catalyst 2900/3500 XL, 2940, 2970, 2950/2955, 3550, and 3750 series fixed-configuration switches. AC power supplies, connectors, and cords for these switches are also covered.

Console and Aux Port Cables

Different Catalyst Supervisor Engines use either a rolled or a straight-through cable in order to connect a terminal or modem to the console port. Refer to these documents for information on how to connect a terminal or modem to the console port of Catalyst series switches:

• Connecting a Terminal to the Console Port on Catalyst Switches

• Connecting a Modem to the Console Port on Catalyst Switches

Auxiliary (AUX) ports on Layer 3 (L3) switches or modules behave much the same way as AUX ports on routers and are used to connect modems. Refer to Modem-Router Connection Guide  for information on how to connect a modem to an AUX port.

Which RJ-45 Ethernet Cable Do I Use?

A common question that concerns RJ-45 unshielded twisted pair (UTP) Ethernet cable concerns how to distinguish between rolled, straight-through, and crossover cables, and when to use them. Use the comparison guide found in the Configure Cable Requirements for Console and AUX Ports  in order to see the difference between these cables.

Cables to Hubs, Switches, Routers, and Workstations

Crossover and straight-through cables are used in order to connect switch ports or interfaces to network devices. Consult this table in order to see when to use each of these cable types. Find the device in the left-hand column and match it up with another device in the top row. The intersection of these two devices gives you the cable type used to connect them together.

Note: The ports on Catalyst switches that run Cisco IOS® Software (Native) can be configured to act as Layer 2 (L2) or Layer 3 (L3) ports. When you connect the RJ-45 cable from a Layer 3 port, which acts as a router port, to other devices, use the previous table. In summary, the cables used do not change, regardless of whether the port is configured to be in Layer 2 (switch port) or Layer 3 (router port) mode.

Most Common Cable Connectors

These diagrams show some of the most common cable types and connectors used on Catalyst switches.

RJ-45	RJ-21 Telco
This is used in order to connect to 10/100 or 10/100/1000 Ethernet ports and 1000Base-T Gigabit Interface Converter (GBIC) or small form factor pluggable (SFP) GBIC ports. 10/100/1000 Ethernet ports must use four twisted-pair Category 5, 5e or 6 cables.	This is used in order to connect to 10/100BASE-TX RJ-21 telco interfaces. Use Category 5 UTP cables with male RJ-21.

MT-RJ Fiber-Optic	SC Fiber-Optic
This is used in order to connect to 100Base-FX fiber-optic ports. Use multimode fiber (MMF) cables with MT-RJ connectors.	This is used in order to connect to 100Base-FX, 1000Base-SX, Long Wavelength/Long Haul (LX/LH) and ZX fiber-optic ports or GBICs. Use MMF or single-mode fiber (SMF) fiber-optic cable.

LC Fiber-Optic	GigaStack
This is used in order to connect to SFP fiber-optic module ports.	This is used in order to connect to GigaStack GBIC ports. Cisco GigaStack technology uses proprietary GBICs and cables.

StackWise
This is used in order to connect to StackWise ports on the rear panel of Catalyst 3750 switches. Cisco StackWise technology uses proprietary connectors and cables.

GBIC and SFP Connectors

Many Catalyst switches, Supervisor Engines and switching modules have removable Gigabit Interface Converters (GBICs) or small form factor pluggable (SFP)-type connectors. These diagrams show some of the most common GBIC and SFP connectors used on Catalyst switches.

Note: A Catalyst 2950 switch is used for demonstration purposes.

1000Base-X	1000Base-T
This uses SC fiber-optic connector and MMF or SMF cable. Part numbers: WS-G5484 (1000Base-SX GBIC) WS-G5486 (1000Base-LX/LH GBIC) WS-G5487 (1000Base-ZX GBIC)	This uses RJ-45 connector and cable. Part number: WS-G5483 (1000Base-T GBIC)

WS-X3500-XL GigaStack GBIC	SFP Module
This uses Cisco Gigastack connector and cable. Part Number: WS-X3500-XL (GigaStack GBIC)	This uses LC fiber-optic connector or RJ-45 for 1000Base-T SFP. Part numbers: GLC-T (1000Base-T SFP) GLC-SX-MM (1000Base-SX SFP) GLC-LH-SM (1000Base-LX/LH SFP) GLC-ZX-SM (1000Base-ZX)

GBIC and SFP support depends on the platform and software version. Refer to these documents for GigabitEthernet system requirements, as well as GBIC system requirements, Coarse Wave Division Multiplexer (CWDM) GBIC, Gigastack GBIC, and SFP system requirements:

• Implement Gigabit Ethernet on Catalyst Switches

• Catalyst GigaStack GBIC Installation Guide 

• 1000BASE-T GBIC Installation Notes

• Gigabit Interface Converter (GBIC) Module and Small Form-Factor Pluggable (SFP) GBIC Module Installation Information and Specifications

Catalyst 6500/6000 Switch Connectors and Cables

Identify the switch chassis and switching module part number. Use this table in order to match up the part number with the type of connector and cable used.

Note: This guide does not cover cables for the Catalyst 6000 Optical Services Module (OSM) or port adapter cables for the FlexWAN card.

Refer to Optical Services Module Installation and Verification Note  for OSM cabling and specifications.

Refer to FlexWAN and Enhanced FlexWAN Modules Installation Guide  for information about FlexWAN port adapters.

¹LX/LH GBICs require a mode-conditioning patch cord between the GBIC and MMF. Refer to Use of Mode Conditioning Patch Cables in Gigabit Ethernet and 10 Gigabit Ethernet Laser-Based Transmissions  for more information.

Catalyst 4500/4000 Switch Connectors and Cables

Refer to Module Overview  for the detailed specification for the Catalyst 4500 switching modules.

Refer to Catalyst 4000 Switching Modules  for the detailed specification for the Catalyst 4000 switching modules.

Catalyst 3750 Connectors and Cables

Identify the switch chassis part number. Use this table in order to match up the part number with the type of connector and cable used.

Note: The Catalyst 3750 switch ships with a 0.5-meter StackWise cable that you can use in order to connect the StackWise ports on the rear panel. You can also order these StackWise cables from your Cisco sales representative: CAB-STACK-50CM= (0.5-meter cable), CAB-STACK-1M= (1-meter cable), and CAB-STACK-3M= (3-meter cable).

Catalyst 3560/3560E Connectors and Cables

Identify the switch chassis part number. Use this table in order to match up the part number with the type of connector and cable used.

SFP Module Patch Cable

The Catalyst 3560 switch supports the SFP module patch cable, a 1/2 meter, copper, passive cable with SFP module connectors at each end. The patch cable can connect two Catalyst 3560 switches in a cascaded configuration.

Catalyst 3550 Connectors and Cables

Identify the switch chassis part number. Use this table in order to match up the part number with the type of connector and cable used.

Note: Some Catalyst 3550 switches support the GigaStack GBIC, which requires a Cisco proprietary cable of either CAB-GS-50CM (0.5-meter cable) or CAB-GS-1M (1-meter cable).

Catalyst 2970 Connectors and Cables

Catalyst 2950/2955 Connectors and Cables

Identify the switch chassis part number. Use this table in order to match up the part number with the type of connector and cable used.

Note: This guide does not cover the Catalyst 2950 Long-Reach Ethernet (LRE) Switches.

Note: Some Catalyst 2950 switches support the GigaStack GBIC, which requires a Cisco proprietary cable of either CAB-GS-50CM (0.5-meter cable) or CAB-GS-1M (1-meter cable).

Catalyst 2940 Connectors and Cables

Identify the switch chassis part number. Use this table in order to match up the part number with the type of connector and cable used.

Catalyst 2900/3500 XL Connectors and Cables

Identify the switch chassis or expansion module part number. Use this table in order to match up the part number with the type of connector and cable used.

Note: This guide does not cover the WS-C2912-LRE-XL or WS-C2912-LRE-XL switches.

Note: Some Catalyst 3500XL switches support the GigaStack GBIC, which requires a Cisco proprietary cable of either CAB-GS-50CM or CAB-GS-1M.

AC Power Supplies, Connectors, and Cords for Catalyst Switches

In this section you see the summary of AC power supplies, power connectors, and cords for Catalyst 6500/6000, 5500/5000 and 4500/4000 series, and Catalyst 3750, 2950, 2940, and 2900/3500XL series switches. Refer to the Power Installation Guidelines in the tables that correspond in the next section for international power requirements, DC power requirements, and other technical specifications.

Different Modules require different amount of power. Inline Power modules supplies the power to the IP phones. Cisco has inline power module to power the IP phones. You have to choose the correct power supply in order to support the various line cards, modules and Supervisor Engines on the switch. Cisco offers a tool called the Cisco Power Calculator  which can be used in order to choose the correct power supply for your switch. Launch the Cisco Power Calculator  and fill out the Product family, Supervisor Engine, Input voltage, line cards and the number of PoE devices. IP phones are the example for PoE devices and most of the IP phones belong to IEEE 802.3af Device - Class 2 (7W). Then the power calculator shows the results of different choices of power supplies. From that, you can choose the required power supply. The power supplies successfully operate at their greatest capacity if the input voltage is between 200 and 240 volts AC.

Catalyst 6500/6000 Series Switch Power Supplies and Cables

This table is a quick reference for the available power supplies and cables in North American standard. Refer to Catalyst 6500 Power Supply Specifications  for the detailed specifications you can. These few points are important to know:

• The 950W (PWR-950-AC), 950W DC (PWR-950-DC) and 1400W AC (PWR-1400-AC) are used only with the Catalyst 6503 and Catalyst 6503-E Switches.

• The Power supplies 1000W and 1300W can be used only with Catalyst 6506, 6509, and 6509-NEB-A switches. The Supervisor Engines SUP32 and SUP720 are incompatible when 1000W and 1300W power supplies are used.

• With a fully populated Catalyst 6513 switch, two 2500 W power supplies are not fully redundant.

• If you operate the 2500 W power supply at the low range input (100 to 120 VAC), it is not redundant in a fully populated Catalyst 6509, Catalyst 6509-E, Catalyst 6509-NEB, or Catalyst 6509-NEB-A switch.

• The Power supplies 2500W, 2700W, and 3000W can operate at two different voltage levels (110Vac and 220Vac). The Power supply output depends on the supplied input AC power. This table shows the power ouput:

  Power Supply	Power Output at 110Vac, 16A	Power Output at 220Vac, 16A
  2500W	1300W	2500W
  2700W	1350W	2700W
  3000W	1400W	3000W

• The AC power cords are hardwired to the 4000W Power supplies (WS-CAC-4000W-US=). It supports only NEMA L6-30.

• The 6000W power supply cannot be installed in the Catalyst 6503, Catalyst 6503-E, and Catalyst 6504-E switch chassis.

• When 6000W power supply is used with the chassis Catalyst 6506, 6509, 6509-NEB, and 6509-NEB-A, it operates at 4000W maximum output. It operates at 6000W maximum output when it is used with Catalyst 6506-E, 6509-E, and 6513.

• 6000W power supply has two AC Power inputs. These are the various combinations of AC inputs and the corresponding net power output:

  6000W Power Supply Power Options
  AC Input 1	AC Input 2	Net Power Supply Output
  110Vac, 16A	Not Connected	No Power Output
  Not Connected	110Vac, 16A	No Power Output
  110Vac, 16A	110Vac, 16A	2900W
  220Vac, 16A	Not Connected	2900W
  Not Connected	220Vac, 16A	2900W
  110Vac, 16A	220Vac, 16A	2900W
  220Vac, 16A	110Vac, 16A	2900W
  220Vac, 16A	220Vac, 16A	6000W

  

  Note: If you have 110Vac power inputs, you have to connect both the AC inputs of the 6000W power supply in order to power on the switch.

• The Catalyst 6500 series switches allow you to mix AC-input and DC-input power supplies in the same chassis.

The modules have different power requirements, and some configurations require more power than a single power supply can provide. The power management feature allows you to power all installed modules with two power supplies. But, redundancy is not supported in this configuration because the total power drawn from both power supplies is at no time greater than the capability of one supply. Refer to the Power Management and Environmental Monitoring  chapter of the Catalyst 6500 Software Configuration Guide for the detailed explanation of power redundancy.

Note: This document does not discuss the total power available with the currently shipped power supplies for Catalyst 6500/6000 series switches or the amount drawn from each Catalyst 6500/6000 series line card. Refer to the document Power Management for Catalyst 6000 Series Switches for this information.

Catalyst 6500/6000
Power Supply Part Number	Power Cord Part Number	Connector Type	Power Installation Guidelines
PWR-950-AC950W power supplyWS-CAC-1000W1000W power supply	CAB-7KAC-15 AC Power Cord North America, 15A		Catalyst 6500/6000
WS-CAC-1300W1300W Power Supply	CAB-7513AC AC Power Cord North America (110Vac, 20A)
PWR-1400-AC1400W Power Supply	CAB-7513AC= AC Power Cord North America (110Vac, 20A)
	CAB-AC-2500W-US1= 250Vac 16A, straight-blade NEMA 6-20 plug
	CAB-AC-C6K-TWLK= 250Vac 16A, twist-lock NEMA L6-20 plug
WS-CAC-2500W2500W AC Power Supply	CAB-7513AC AC Power Cord North America (110Vac, 20A)
	CAB-AC-2500W-US1 250Vac 16A, straight-blade NEMA 6-20 plug
	CAB-AC-C6K-TWLK 250Vac 16A, twist-lock NEMA L6-20 plug
PWR-2700-AC/42700W AC Power Supply	CAB-7513AC AC Power Cord North America (110Vac, 20A)
	CAB-AC-2500W-US1 250Vac 16A, straight-blade NEMA 6-20 plug
	CAB-AC-C6K-TWLK 250Vac 16A, twist-lock NEMA L6-20 plug
WS-CAC-3000W3000 W AC-input power supply	CAB-7513AC=110Vac 20A, NEMA 5-20 plug
	CAB-AC-2500W-US1=250Vac 16A, straight-blade NEMA 6-20 plug
	CAB-AC-C6K-TWLK=250Vac 16A, twist-lock NEMA L6-20 plug
WS-CAC-4000W-US4000W AC Power Supply	Cable-attached to the power supply 250Vac 30A
WS-CAC-6000W6000W AC Power supply	CAB-7513AC=110Vac 20A, NEMA 5-20 plug
	CAB-AC-2500W-US1=250Vac 16A, straight-blade NEMA 6-20 plug
	CAB-AC-C6K-TWLK=250Vac 16A, twist-lock NEMA L6-20 plug

Catalyst 4500/4000 Series Switch Power Supplies and Cables

Refer to the Power Connection Guidelines for AC-Powered Systems  section in Catalyst 4500 Series Installation Guide  for the list of Power supplies, cables and the corresponding part numbers.

Catalyst 2900/3500XL, 2940, 2950, 3550 and 3750 Series Switch Power Supplies and Cables

Catalyst 2900/3500, 2940, 2950, 3550 and 3750 switches require standard 110V, 15 Amp AC input Power.

Catalyst 2900/3500XL, 2940, 2950, 3550 and 3750
Power Supply Part Number	Power Cord Part Number	Connector Type	Power Installation Guidelines
Internal non-replaceable AC power supply	CAB-AC=		N/A

RJ-21 to RJ-45 Pin-Out Pattern

All Catalyst family 10/100TX telco switching modules incorporate industry-standard RJ-21 connectors and require compatible Category 5 cabling systems to achieve 100 Mbps data rates.

Category 5 telco cables can be ordered directly from Cisco. Refer to Cisco.com  for ordering information. This is the information on Cisco part numbers.

This table shows the pin-out pattern used on Catalyst 10/100TX (and 10BaseT) RJ-21 switching modules.

Related Information

• Switches Product Page
• LAN Switching Configuration Guide
• Cisco Technical Support & Downloads