Hardware Installation Guide
Page 3
... Modes 1-16 Dual-Purpose Port LEDs 1-18 Cable Guard for the Catalyst 2960 8-Port Switches 1-19 Rear Panel Description 1-19 Internal Power Supply 1-20 Cisco RPS 1-20 Cisco RPS 2300 1-20 Cisco RPS 675 1-21 Console Port 1-21 Security Slots 1-21 Management Options 1-22 Network Configurations 1-22 Catalyst 2960 Switch Hardware Installation Guide iii 1 C H A P T E R OL-7075-09 Preface vii CONTENTS...
... Modes 1-16 Dual-Purpose Port LEDs 1-18 Cable Guard for the Catalyst 2960 8-Port Switches 1-19 Rear Panel Description 1-19 Internal Power Supply 1-20 Cisco RPS 1-20 Cisco RPS 2300 1-20 Cisco RPS 675 1-21 Console Port 1-21 Security Slots 1-21 Management Options 1-22 Network Configurations 1-22 Catalyst 2960 Switch Hardware Installation Guide iii 1 C H A P T E R OL-7075-09 Preface vii CONTENTS...
Hardware Installation Guide
Page 11
..., and 1000BASE-T Ethernet traffic from other switches. Table 1-1 describes the switch model features. Product Overview 1 C H A P T E R The Catalyst 2960 switch-also referred to as the switch-is an Ethernet switch to which you can deploy these switches outside of the Catalyst 2960 switch. Table 1-1 Catalyst 2960 Switch Model Descriptions Switch Model Catalyst 2960-8TC-S Catalyst 2960-24-S Catalyst 2960-24TC-S Catalyst 2960-48TC-S Catalyst 2960-48TT-S Catalyst 2960-48PST-S Catalyst 2960-24PC-S Supported Software Image Description LAN-Lite 8 10/100BASE-TX Ethernet...
..., and 1000BASE-T Ethernet traffic from other switches. Table 1-1 describes the switch model features. Product Overview 1 C H A P T E R The Catalyst 2960 switch-also referred to as the switch-is an Ethernet switch to which you can deploy these switches outside of the Catalyst 2960 switch. Table 1-1 Catalyst 2960 Switch Model Descriptions Switch Model Catalyst 2960-8TC-S Catalyst 2960-24-S Catalyst 2960-24TC-S Catalyst 2960-48TC-S Catalyst 2960-48TT-S Catalyst 2960-48PST-S Catalyst 2960-24PC-S Supported Software Image Description LAN-Lite 8 10/100BASE-TX Ethernet...
Hardware Installation Guide
Page 12
Features Chapter 1 Product Overview Table 1-1 Catalyst 2960 Switch Model Descriptions (continued) Switch Model Catalyst 2960-24LC-S Catalyst 2960-8TC-L Catalyst 2960G-8TC-L Catalyst 2960PD-8TT-L Catalyst 2960-24LT-L Catalyst 2960-24PC-L Catalyst 2960-24TC-L Catalyst 2960G-24TC-L Catalyst 2960-24TT-L Catalyst 2960-48PST-L Catalyst 2960-48TC-L Catalyst 2960G-48TC-L Catalyst 2960-48TT-L Supported Software Image Description LAN-Lite 24 10/100BASE-TX ports (8 of which are PoE) and 2 dual-purpose ports LAN-Base 8 10/100BASE-TX Ethernet ports and 1 dual...
Features Chapter 1 Product Overview Table 1-1 Catalyst 2960 Switch Model Descriptions (continued) Switch Model Catalyst 2960-24LC-S Catalyst 2960-8TC-L Catalyst 2960G-8TC-L Catalyst 2960PD-8TT-L Catalyst 2960-24LT-L Catalyst 2960-24PC-L Catalyst 2960-24TC-L Catalyst 2960G-24TC-L Catalyst 2960-24TT-L Catalyst 2960-48PST-L Catalyst 2960-48TC-L Catalyst 2960G-48TC-L Catalyst 2960-48TT-L Supported Software Image Description LAN-Lite 24 10/100BASE-TX ports (8 of which are PoE) and 2 dual-purpose ports LAN-Base 8 10/100BASE-TX Ethernet ports and 1 dual...
Hardware Installation Guide
Page 14
... 48-port switches: • Catalyst 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S Switches, page 1-4 • Catalyst 2960-24PC-L, 2960-24PC-S, 2960-24LC-S, 2960-24TC-L, 2960-48TC-L, 2960-24LT-L, 2960-24TT-L, 2960-48TT-L, 2960-48PST-L, and 2960-48PST-S Switches, page 1-6 • Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L Switches, page 1-8 Catalyst 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S Switches The 10/100 ports on the Catalyst 2960-24-S switch are numbered as the Catalyst 2960-24T-S switch. See Figure 1-1. Front Panel Description Chapter...
... 48-port switches: • Catalyst 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S Switches, page 1-4 • Catalyst 2960-24PC-L, 2960-24PC-S, 2960-24LC-S, 2960-24TC-L, 2960-48TC-L, 2960-24LT-L, 2960-24TT-L, 2960-48TT-L, 2960-48PST-L, and 2960-48PST-S Switches, page 1-6 • Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L Switches, page 1-8 Catalyst 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S Switches The 10/100 ports on the Catalyst 2960-24-S switch are numbered as the Catalyst 2960-24T-S switch. See Figure 1-1. Front Panel Description Chapter...
Hardware Installation Guide
Page 15
... set the connector type for these ports. Figure 1-4 Catalyst 2960-48TT-S Switch Front Panel Catalyst 2960 Series SI 271431 1 2 1 10/100 ports 2 10/100/1000 ports OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-5 This switch has two 10/100/1000 uplink ports, numbered 1... and 2. See Figure 1-2 and Figure 1-3. For more information about the dual-purpose port, see the "Dual-Purpose Port" section on . Chapter 1 Product Overview Front Panel Description...
... set the connector type for these ports. Figure 1-4 Catalyst 2960-48TT-S Switch Front Panel Catalyst 2960 Series SI 271431 1 2 1 10/100 ports 2 10/100/1000 ports OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-5 This switch has two 10/100/1000 uplink ports, numbered 1... and 2. See Figure 1-2 and Figure 1-3. For more information about the dual-purpose port, see the "Dual-Purpose Port" section on . Chapter 1 Product Overview Front Panel Description...
Hardware Installation Guide
Page 16
... Panel Description Chapter 1 Product Overview Catalyst 2960-24PC-L, 2960-24PC-S, 2960-24LC-S, 2960-24TC-L, 2960-48TC-L, 2960-24LT-L, 2960-24TT-L, 2960-48TT-L, 2960-48PST-L, and 2960-48PST-S Switches The 10/100 ports on the switches are PoE ports. See Figure 1-7. The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on the Catalyst 2960-24PC-L and 2960-24PC-S switches are...
... Panel Description Chapter 1 Product Overview Catalyst 2960-24PC-L, 2960-24PC-S, 2960-24LC-S, 2960-24TC-L, 2960-48TC-L, 2960-24LT-L, 2960-24TT-L, 2960-48TT-L, 2960-48PST-L, and 2960-48PST-S Switches The 10/100 ports on the switches are PoE ports. See Figure 1-7. The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on the Catalyst 2960-24PC-L and 2960-24PC-S switches are...
Hardware Installation Guide
Page 17
.../100/1000 uplink ports 2 10/100 ports Figure 1-11 Catalyst 2960-24TT-L Switch Front Panel 204607 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100 ports 2 10/100/1000 uplink ports OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-7 Chapter 1 Product Overview Front Panel Description The Catalyst 2960-24TC-L and Catalyst 2960-48TC-L switches have two 10/100/1000 uplink ports, numbered 1 and...
.../100/1000 uplink ports 2 10/100 ports Figure 1-11 Catalyst 2960-24TT-L Switch Front Panel 204607 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100 ports 2 10/100/1000 uplink ports OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-7 Chapter 1 Product Overview Front Panel Description The Catalyst 2960-24TC-L and Catalyst 2960-48TC-L switches have two 10/100/1000 uplink ports, numbered 1 and...
Hardware Installation Guide
Page 18
... two 10/100/1000 uplink ports (numbered 3 and 4). See Figure 1-13 and Figure 1-14. See Figure 1-15 and Figure 1-16. Figure 1-13 Catalyst 2960-48PST-L Switch Front Panel 3 1 2 3 4 5 6 SYST 1X RPS STAT DUPLX SPEED PoE MODE 2X POWER OVER ETHERNET 7 8 9 10 11 12 13 14... are grouped in pairs. Front Panel Description Chapter 1 Product Overview Figure 1-12 Catalyst 2960-48TT-L Switch Front Panel 204609 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100 ports 2 10/100/1000 uplink ports The Catalyst 2960-48PST-L and 2960-48PST-S switches have dual-purpose ports, meaning ports 21...
... two 10/100/1000 uplink ports (numbered 3 and 4). See Figure 1-13 and Figure 1-14. See Figure 1-15 and Figure 1-16. Figure 1-13 Catalyst 2960-48PST-L Switch Front Panel 3 1 2 3 4 5 6 SYST 1X RPS STAT DUPLX SPEED PoE MODE 2X POWER OVER ETHERNET 7 8 9 10 11 12 13 14... are grouped in pairs. Front Panel Description Chapter 1 Product Overview Figure 1-12 Catalyst 2960-48TT-L Switch Front Panel 204609 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100 ports 2 10/100/1000 uplink ports The Catalyst 2960-48PST-L and 2960-48PST-S switches have dual-purpose ports, meaning ports 21...
Hardware Installation Guide
Page 19
...switch. Chapter 1 Product Overview Front Panel Description Figure 1-15 Catalyst 2960G-24TC-L Switch Front Panel 204610 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100/1000 ports 2 Dual-purpose ports Figure 1-16 Catalyst 2960G-48TC-L Switch... Dual-purpose ports 204611 Catalyst 2960 8-Port Switches These sections describe the Catalyst 2960 8-port switches: • Catalyst 2960PD-8TT-L Switch, page 1-9 • Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches, page 1-10 Catalyst 2960PD-8TT-L Switch The Catalyst 2960PD-8TT-L (Figure 1-17) switch front panel has a...
...switch. Chapter 1 Product Overview Front Panel Description Figure 1-15 Catalyst 2960G-24TC-L Switch Front Panel 204610 SYST RPS STAT DUPLX SPEED MODE 1 2 1 10/100/1000 ports 2 Dual-purpose ports Figure 1-16 Catalyst 2960G-48TC-L Switch... Dual-purpose ports 204611 Catalyst 2960 8-Port Switches These sections describe the Catalyst 2960 8-port switches: • Catalyst 2960PD-8TT-L Switch, page 1-9 • Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches, page 1-10 Catalyst 2960PD-8TT-L Switch The Catalyst 2960PD-8TT-L (Figure 1-17) switch front panel has a...
Hardware Installation Guide
Page 20
...3 Dual-purpose port 2 10/100/100 ports Catalyst 2960 Series SI 3 Figure 1-19 Catalyst 2960-8TC-L Switch Front Panel SYST STAT DPLX SPD MODE CONSOLE 1x 2x 3x 4x 5x 6x 7x 8x Catalyst 2960 Series 1 204627 1 2 3 1 Console port ...Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches The console ports for these ports. Use the software to set the connector type for the Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC-L switches...
...3 Dual-purpose port 2 10/100/100 ports Catalyst 2960 Series SI 3 Figure 1-19 Catalyst 2960-8TC-L Switch Front Panel SYST STAT DPLX SPD MODE CONSOLE 1x 2x 3x 4x 5x 6x 7x 8x Catalyst 2960 Series 1 204627 1 2 3 1 Console port ...Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches The console ports for these ports. Use the software to set the connector type for the Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC-L switches...
Hardware Installation Guide
Page 21
Chapter 1 Product Overview Front Panel Description 10/100 Ports You can set the 10/100 ...duplex mode. For configuration information for copper Ethernet connections and configures the interfaces accordingly. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-11 In all cases, the attached device must be sure that is autonegotiate....MDIX) feature. You can use the mdix auto interface configuration command in the CLI to workstations, servers, routers, and Cisco IP Phones, be within 328 feet (100 meters). 100BASE-TX traffic requires a Category 5 or higher cable. 10BASE-T...
Chapter 1 Product Overview Front Panel Description 10/100 Ports You can set the 10/100 ...duplex mode. For configuration information for copper Ethernet connections and configures the interfaces accordingly. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-11 In all cases, the attached device must be sure that is autonegotiate....MDIX) feature. You can use the mdix auto interface configuration command in the CLI to workstations, servers, routers, and Cisco IP Phones, be within 328 feet (100 meters). 100BASE-TX traffic requires a Category 5 or higher cable. 10BASE-T...
Hardware Installation Guide
Page 22
...is also supported for Cisco IP Phones and Cisco Aironet Access Points. • Each of the PoE ports on the Catalyst 2960 switches deliver up to 8 of the hazard. The Catalyst 2960-24PC-L, 2960-48PST-L, 2960-48PST-S, and 2960-24PC-S switches deliver a maximum ... switches by a crossover cable. 1-12 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview PoE Ports (Only Catalyst 2960 PoE Switches) This section applies only to the Catalyst 2960-24PC-L, 2960-24LT-L, 2960-24PC-S, 2960-24LC-S, 2960 48PST-L, and 2960-48PST-S switches....
...is also supported for Cisco IP Phones and Cisco Aironet Access Points. • Each of the PoE ports on the Catalyst 2960 switches deliver up to 8 of the hazard. The Catalyst 2960-24PC-L, 2960-48PST-L, 2960-48PST-S, and 2960-24PC-S switches deliver a maximum ... switches by a crossover cable. 1-12 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview PoE Ports (Only Catalyst 2960 PoE Switches) This section applies only to the Catalyst 2960-24PC-L, 2960-24LT-L, 2960-24PC-S, 2960-24LC-S, 2960 48PST-L, and 2960-48PST-S switches....
Hardware Installation Guide
Page 23
Chapter 1 Product Overview Front Panel Description SFP Module Slots The Catalyst 2960 switches (other switches. For more information about cabling requirements, see your Cisco representative. (See Figure 1-22.) OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-13 However,...and one connector of the switch. These Catalyst 2960 switches do not have an SFP module slot: • Catalyst 2960PD-8TT-L • Catalyst 2960-24LT-L • Catalyst 2960-24-S • Catalyst 2960-24TT-L • Catalyst 2960-48TT-L • Catalyst 2960-48TT-S The transceiver modules ...
Chapter 1 Product Overview Front Panel Description SFP Module Slots The Catalyst 2960 switches (other switches. For more information about cabling requirements, see your Cisco representative. (See Figure 1-22.) OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-13 However,...and one connector of the switch. These Catalyst 2960 switches do not have an SFP module slot: • Catalyst 2960PD-8TT-L • Catalyst 2960-24LT-L • Catalyst 2960-24-S • Catalyst 2960-24TT-L • Catalyst 2960-48TT-L • Catalyst 2960-48TT-S The transceiver modules ...
Hardware Installation Guide
Page 24
... or an RPS LED: Catalyst 2960-24-S, Catalyst 2960-24TC-S, Catalyst 2960-48TT-S, Catalyst 2960-48TC-S. 1-14 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Figure 1-23 shows the switch LEDs and the Mode button that you use to monitor switch activity and its performance. The four Catalyst 2960 8-port switches and these models do not have a PoE LED. Front Panel Description Chapter 1 Product Overview Figure...
... or an RPS LED: Catalyst 2960-24-S, Catalyst 2960-24TC-S, Catalyst 2960-48TT-S, Catalyst 2960-48TC-S. 1-14 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Figure 1-23 shows the switch LEDs and the Mode button that you use to monitor switch activity and its performance. The four Catalyst 2960 8-port switches and these models do not have a PoE LED. Front Panel Description Chapter 1 Product Overview Figure...
Hardware Installation Guide
Page 25
...LED shows whether the system is receiving power and is operating normally. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-15 The PoE LED is not powered on the Catalyst 2960 PoE switches. Table 1-2 lists the LED colors and their meanings. Table 1-2 System LED Color...Green Amber System Status System is only on . System is receiving power but is not functioning properly. Chapter 1 Product Overview Figure 1-23 Catalyst 2960 Switch LEDs 8 Front Panel Description System LED 204612 1 2 3 4 5 6 SYST RPS STAT DUPLX SPEED PoE MODE 7 12 1X 34 56 78 9 10 11...
...LED shows whether the system is receiving power and is operating normally. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-15 The PoE LED is not powered on the Catalyst 2960 PoE switches. Table 1-2 lists the LED colors and their meanings. Table 1-2 System LED Color...Green Amber System Status System is only on . System is receiving power but is not functioning properly. Chapter 1 Product Overview Figure 1-23 Catalyst 2960 Switch LEDs 8 Front Panel Description System LED 204612 1 2 3 4 5 6 SYST RPS STAT DUPLX SPEED PoE MODE 7 12 1X 34 56 78 9 10 11...
Hardware Installation Guide
Page 26
... on the Catalyst 2960 PoE switches. 1-16 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Port LEDs and Modes The port LEDs, as a group or individually, display information about the switch and about the Cisco RPS 2300 or the Cisco RPS 675, see the related hardware installation guide for Port LEDs Selected Mode LED Port Mode Description STAT Port...
... on the Catalyst 2960 PoE switches. 1-16 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Port LEDs and Modes The port LEDs, as a group or individually, display information about the switch and about the Cisco RPS 2300 or the Cisco RPS 675, see the related hardware installation guide for Port LEDs Selected Mode LED Port Mode Description STAT Port...
Hardware Installation Guide
Page 27
...DUPLX (duplex) SPEED Off Port is operating at 1000 Mb/s. Blinking green Port is operating in half-duplex mode. Note When installed in Catalyst 2960 switches, 1000BASE-T SFP modules can affect connectivity, and errors such as STP checks the network topology for a link-fault indication. When you ...colors also change a mode, press the Mode button until the desired mode is not forwarding data. Chapter 1 Product Overview Front Panel Description Even if the PoE mode is operating at 1000 Mb/s. Table 1-6 Meaning of the 10/100 PoE ports have been denied power ...
...DUPLX (duplex) SPEED Off Port is operating at 1000 Mb/s. Blinking green Port is operating in half-duplex mode. Note When installed in Catalyst 2960 switches, 1000BASE-T SFP modules can affect connectivity, and errors such as STP checks the network topology for a link-fault indication. When you ...colors also change a mode, press the Mode button until the desired mode is not forwarding data. Chapter 1 Product Overview Front Panel Description Even if the PoE mode is operating at 1000 Mb/s. Table 1-6 Meaning of the 10/100 PoE ports have been denied power ...
Hardware Installation Guide
Page 28
...1-24 Dual-Purpose Port LEDs 1 234 1 1 RJ-45 connector 3 SFP module port in-use LED 4 SFP module slot 1-18 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview Table 1-6 Port Mode PoE Meaning of Port LED Colors in Different Modes on the... port show how the port is being used to connect Cisco prestandard IP Phones or wireless access points or IEEE 802.3af-compliant devices to 124 W of power. The Catalyst 2960-24PC-L, 2960 48PST-L, 2960-48PST-S, and 2960-24PC-S switches provide up to PoE ports. The LED colors have the...
...1-24 Dual-Purpose Port LEDs 1 234 1 1 RJ-45 connector 3 SFP module port in-use LED 4 SFP module slot 1-18 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 Front Panel Description Chapter 1 Product Overview Table 1-6 Port Mode PoE Meaning of Port LED Colors in Different Modes on the... port show how the port is being used to connect Cisco prestandard IP Phones or wireless access points or IEEE 802.3af-compliant devices to 124 W of power. The Catalyst 2960-24PC-L, 2960 48PST-L, 2960-48PST-S, and 2960-24PC-S switches provide up to PoE ports. The LED colors have the...
Hardware Installation Guide
Page 29
...: Cisco Catalyst 2960G-8TC switch Rear Panel Description • Internal Power Supply, page 1-20 • Cisco RPS, page 1-20 • Console Port, page 1-21 Depending on the rear panel. 2. The Catalyst 2960 8-port switches do not have a fan. 4. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-19 These Catalyst 2960 switches do not have an RPS connector: Catalyst 8-port switches, 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S switches...
...: Cisco Catalyst 2960G-8TC switch Rear Panel Description • Internal Power Supply, page 1-20 • Cisco RPS, page 1-20 • Console Port, page 1-21 Depending on the rear panel. 2. The Catalyst 2960 8-port switches do not have a fan. 4. OL-7075-09 Catalyst 2960 Switch Hardware Installation Guide 1-19 These Catalyst 2960 switches do not have an RPS connector: Catalyst 8-port switches, 2960-24-S, 2960-24TC-S, 2960-48TC-S, and 2960-48TT-S switches...
Hardware Installation Guide
Page 30
... these RPS 2300 features through their internal power supply. Note These Catalyst 2960 switches support only the Cisco RPS 2300: Catalyst 2960-24PC-L, 2960-24LT-L, and 2960-48PST-L switches. For complete information about the Cisco RPS products, including compatibility matrixes listing the supported RPS for RPS support 1-20 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 It automatically senses when the internal...
... these RPS 2300 features through their internal power supply. Note These Catalyst 2960 switches support only the Cisco RPS 2300: Catalyst 2960-24PC-L, 2960-24LT-L, and 2960-48PST-L switches. For complete information about the Cisco RPS products, including compatibility matrixes listing the supported RPS for RPS support 1-20 Catalyst 2960 Switch Hardware Installation Guide OL-7075-09 It automatically senses when the internal...