3Com 3C16896, 3C16895, 3C16894, 3C16897 User Manual

3Com Family Switch 7750 Installation Guide

3C16896 8-slot AC Chassis 3C16897 8-slot DC Chassis 3C16895 7-slot Chassis 3C16894 4-slot Chassis and associated modules
http://www.3com.com/
Part No. 10016428-AB Published December 2007
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CONTENTS

ABOUT THIS GUIDE
Conventions 5 Related Documentation 5
SWITCH 7750 COMPONENTS
Switch Chassis 7 Switch Backplane 7 Fabric Module 8 Fabric 32 Submodules 12 I/O Modules 14 Power Module 33 Power Distribution 33 External PoE Power System 33 Fan Assembly 34 Switch 7750 Specifications 35
INSTALLING THE SWITCH 7750
Preparing to Install 37 General Site Requirements 38 Installation Checklist 39 Installing the Chassis 40 Installing the Cabling Rack 40 Installing a Module 41 Installing a Submodule 41 Connecting the Ground Wire 42 Connecting and Configuring Power 42 Installing the Fan Assembly 45 Installing Cables 45 Installing Cabling 47 Post-installation Checklist 48
CONFIGURING THE SWITCH 7750
Configuring the Switch 7750 and a Local Terminal 49 Setting Terminal Parameters 49 Booting the Switch 7750 52
4 CONTENTS
MAINTAINING SOFTWARE
Upgrading Software 55 Lost Passwords 63 Using the BOOT Menu 63
TROUBLESHOOTING
Troubleshooting the Configuration 67 Troubleshooting Power 67 Troubleshooting the Fan 68 Troubleshooting the Modules 68
MAINTAINING HARDWARE
Replacing a Power Module 69 Replacing a Power Supply 70 Replacing I/O Modules 71 Replacing the Fan Assembly 71
OBTAINING SUPPORT FOR YOUR SWITCH
Register Your Product to Gain Service Benefits 73 Purchase Value-Added Services 73 Troubleshoot Online 73 Access Software Downloads 73 Contact Us 74 Telephone Technical Support and Repair 74
SWITCH 7750 CABLES
Console Cable 77 AUX Cable 77 Electrical Port Connector 78 Optical Fiber Cable Connectors 79

ABOUT THIS GUIDE

This guide describes the 3Com® Switch 7750 and how to install hardware, configure and boot software, and maintain software and hardware. This guide also provides troubleshooting and support information for your switch.
This guide is intended for qualified Service personnel who are responsible for configuring, using, and managing the switches. It assumes a working knowledge of local area network (LAN) operations and familiarity with communication protocols that are used to interconnect LANs.
Always download the Release Notes for your product from the 3Com World Wide Web site and check for the latest updates to software and product documentation
http://www.3com.com.
at

Conventions Ta bl e 1 lists icon conventions that are used throughout this guide.

Related Documentation

Ta bl e 1 Notice Icons
Icon Notice Type Description
Information note Information that describes important features or
instructions.
Caution Information that alerts you to potential loss of data
or potential damage to an application, system, or device.
Warning Information that alerts you to potential personal
injury.
The following manuals offer additional information necessary for managing your Switch 7750:
Switch 7750 Command Reference Guide — Provides detailed descriptions of
command line interface (CLI) commands, that you require to manage your Switch 7750.
Switch 7750 Configuration Guide— Describes how to configure your Switch
7750 using the supported protocols and CLI commands.
Switch 7750 Release Notes — Contains the latest information about your
product. If information in this guide differs from information in the release notes, use the information in the Release Notes.
These documents are available in Adobe Acrobat Reader Portable Document Format (PDF) on the 3Com World Wide Web site at
http://www.3com.com/.
6 ABOUT THIS GUIDE
1

SWITCH 7750 COMPONENTS

The chapter describes the following Switch 7750 components:

Switch Chassis

Switch Backplane

Fabric Module
Fabric 32 Submodules
I/O Modules
Power Module
Power Distribution
External PoE Power System
Fan Assembly
Switch 7750 Specifications
Switch Chassis The Switch 7750 is available with a 4-slot, 7-slot, or 8-slot chassis. Table 2 lists the
hardware features of each model.
Ta bl e 2 Hardware Features of the Switch 7750 Models
8-Slot Chassis 4-Slot Chassis 3C16894
Fabric slots 1 1 2
I/O module slots 3 6 6
Fan slot 1 1 2
AC/DC Power module slots
2 3 3
7-Slot Chassis 3C16895
AC 3C16896
DC 3C16897
Switch Backplane The Switch 7750 backplane is part of the integrated chassis and delivers
high-speed data transfer between the Fabric and I/O modules. The backplane bandwidth capacity is 96 Gbps.
The backplane supports the following functions:
Interconnection of signals between modules
Provides communication channels
Hot swapping for modules
Automatic recognition of slots
Distribution of power and management of the power supply for the system
8 CHAPTER 1: SWITCH 7750 COMPONENTS
1
2
3
45 6
7
8
9
3C16857
1234
56
7

Fabric Module There are three Fabric modules for the Switch 7750:

Fabric 64 (3C16857 or 3C16857R)
Fabric 32 (3C16872)
PoE Fabric 96 (3C16886)
The Fabric 64 and Fabric 32 are not interchangeable. You can install the Fabric 32 only in a 4-slot chassis. You can install the Fabric 64 only in the 7-slot or 8-slot chassis. You can install the PoE Fabric 96 in all three chassis.
The Fabric module is the core of Switch 7750 system. It has the following functions:
Connects the I/O modules through the backplane and forwards Layer 2 and
Layer 3 data
Manages and calculates routing
Performs the switch’s software upgrade and system reset functions
Monitors system power and the fan frame
Figure 1 illustrates the front panel of the PoE Fabric 96.
Figure 1 PoE Fabric 96
3C16886
1 Compact Flash port
2 1000BASE-X-SFP ports
3 Console port
4 Ethernet port
5 Ethernet port LEDs
6 Fan LEDs
7 Power LEDs
8 I/O module LEDs
9 Reset button
Figure 2 illustrates the front panel of the Fabric 64.
Figure 2 Fabric 64
3C16857
1 Reset button
2 Console port
3 Ethernet port
4 Ethernet port LEDs
5 Fan LEDs
3C16872
1234567
8
6 Power module LEDs
7 I/O module LEDs
Figure 3 illustrates the front panel of the Fabric 32.
Figure 3 Fabric 32
3C16872

1 Submodule slot

2 Console port
3 Ethernet port
4 Ethernet port LEDs
5 Fan LEDs
6 Power LEDs
7 I/O module LEDs
8 Reset button
Fabric Module 9
Ta bl e 3 lists Fabric specifications.
Ta bl e 3 Fabric Specifications
PoE Fabric 96
Item
(3C16886)
Bandwidth 96 Gbps 64 Gbps 32 Gbps
CPU MPC8245 MPC8260 200 Mhz
BootROM 512 KB 1 MB
SDRAM 256 M 256 MB
Flash 32 MB 16 MB
Submodule slot 1
Dimensions (L x W) 366.7 mm x 340 mm (14.5 x 13.5 in)
External ports One console port that supports local and remote dial-up configuration
management of the switch.
One 10BASE-T/100BASE-TX port for upgrade and network management
One Compact Flash port for storing log and host version and for online software upgrades
Four 1000BASE-X-SFP ports
Maximum power
80 W 80 W 70 W (with
consumption
Fabric 64 (3C16857 or 3C16857R)
Fabric 32 (3C16872)
submodule)
Submodule Slot The submodule slot in the Fabric 32 offers extended Ethernet capacity using the
following submodules:
10 CHAPTER 1: SWITCH 7750 COMPONENTS
4-port 1000BASE-X-GBIC submodule
4-port 10/100/1000BASE-T submodule
For more information on these submodules, see “Fabric 32 Submodules”on page 12.

Fixed Ports The Switch 7750 Fabric modules provide the following fixed ports:

Compact Flash (CF) Port
1000BASE-X-SFP (PoE Fabric 96 only)
Console Port
Ethernet Port
Compact Flash (CF) Port
The Fabric module provides a CF port to accommodate a standard CF card, where you can save logging information, host version information, alarming and other diagnostic information. You can also use the CF port to upgrade software online.
1000BASE-X-SFP Ports
The PoE Fabric 96 provides four 1000 Mbps full-duplex SFP ports. Table 4 describes the SFP cables for these ports.
Ta bl e 4 Cables for 1000BASE-T-SFP Modules
Maximum
SFP Module
Wavelength
Connector Matching Cable
1000BASE-SX-SFP 850 nm LC 50/125 µm
Central
transmission distance
550 m (1804 ft.) multimode optical fiber cable
62/125 µm
275 m (902 ft.) multimode optical fiber cable
1000BASE-LX-SFP 1310 nm 9/125 µm single
1000BASE-LH-SFP 30 km (19 mi.)
mode optical fiber cable
10 km (6 mi.)
1000BASE-ZX-LR-SFP 1550 nm 40 km (25 mi.)
1000BASE-ZX-VR-SFP 70 km (43 mi.)
1000BASE-T-FD-SFP RJ-45 100 m (328 ft.)
Ta bl e 8 describes the LEDs of the SFP ports.
Ta bl e 5 SFP Port LEDs
LED Description
LINK/ACT Off — The line is not connected.
Green — The line is connected. Green flashing — Data is being transmitted or received.
Fabric Module 11
Console Port
The console port is connected to the configuration terminal using an RJ-45 connector. You can use the console port for system debugging, configuration, maintenance, management, and loading application files.
The console port can also be connected to a modem for functions such as remote system debugging, configuration, maintenance, and management. You can configure the baud rate on the console port.
Ta bl e 6 lists console port specifications.
Ta bl e 6 Console Port Specifications
Specification Description
Port connector RJ-45
Port standard Asynchronous EIA/TIA-232
Baud rate 9600 bps (by default)
Transmission distance 15 m (45 ft)
Services Connects with character terminal
Connects with local or remote PC serial port and runs terminal emulation on a PC (a pair of modems are required for a remote connection)
Ethernet Port
The Ethernet port on the Fabric is connected to a computer using an RJ-45 connector. You can use the Ethernet port for system application downloading and debugging. The Ethernet port can also be connected to devices such as a network management workstation to manage the system remotely.
Ta bl e 7 lists Ethernet port specifications.
Ta bl e 7 Ethernet Port Specifications
Specification Description
Port connector RJ-45
Number of port(s) 1
Port speed 10 Mbps, half/full duplex
Cable and maximum transmission distance
Port function Switch software upgrade and network management
100 Mbps, half/full duplex MDI/MDIX auto sensing
Category-5 twisted pair for transmission within 100 m (328 ft)
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45 connector and MDI/MDI-X pinout details.
Ta bl e 8 describes the LEDs of the Ethernet port.
Ta bl e 8 Ethernet Port LEDs
LED Description
LINK Off — The line is not connected.
Green — The line is connected.
12 CHAPTER 1: SWITCH 7750 COMPONENTS
Table 8 Ethernet Port LEDs (continued)
LED Description
ACTIVE Green — No data is being transmitted or received.

Module LEDs The module LEDs show the status of the I/O modules, as described in Table 9.

Ta bl e 9 I/O Module LEDs
LED Status description
RUN Green or off — The module failed or has not been inserted.
ALM Off — The module is working normally or has not been
Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the power modules, as
described in

Ta bl e 10 Power LEDs

Ta bl e 10.
Green flashing — Data is being transmitted or received.
Green flashing — The module is working normally.
inserted. Green or green flashing — The module failed or is not working normally.
LED Description
OK Green — The corresponding power module is working
normally. Off — The corresponding power module is not working or has not been installed.
FAIL Green — The corresponding power module is not working.
Off — The corresponding power module works normally or has not been installed.

Fan LED Fan LEDs show the status of the fan frame, as described in Table 11.

Ta bl e 11 Fan LEDs
LED Description
OK Green — The fan is working normally.
Off — The fan is not working or has not been installed.
FAIL Green — The fan is not working.
Off — The fan is working normally or has not been installed.

Reset Button The reset button resets the entire system.

Fabric 32 Submodules The Fabric 32 provides a slot for one submodule. The Fabric 32 supports the

following submodules:
4-Port 1000BASE-X-GBIC
Submodule
4-Port 1000BASE-X-GBIC Submodule (3C16874)
4-Port 10/100/1000BASE-T Submodule (3C16873)
The 4-port 1000BASE-X-GBIC submodule provides four GE full-duplex Ethernet GBIC ports.
Figure 4 illustrates the 4-port 1000BASE-X-GBIC submodule.
Fabric 32 Submodules 13
12
3C16873
12
Figure 4 4-Port 1000BASE-X-GBIC Submodule
3C16874
Ethernet GBIC port
2 Ethernet GBIC port LED
Ta bl e 12 describes the 4-port 1000BASE-X-GBIC submodule LEDs.
Ta bl e 12 4-Port 1000BASE-X-GBIC Submodule LEDs
LED Description
LINK/ACT Green — The link is operating normally.
Off — The link is not operating. Green flashing — Data is being transmitted or received.
Ta bl e 13 lists the specifications for each of the 4-port 1000BASE-X-GBIC submodule.
4-Port
10/100/1000BASE-T
Submodule
Ta bl e 13 4-Port 1000BASE-X-GBIC Submodule Specifications
Max. Optional GBIC Module
1000BASE-SX-MM (3CGBIC91)
1000BASE-LX-SM-IR (3CGBIC92)
1000BASE-LX-SM (3CGBIC97)
Central Wavelength
850 nm SC 50/125 µm
1310 nm SC 9/125 µm
1550 nm SC 9/125 µm
Connector Type
Interface Fiber Specifications
multi-mode fiber
62.5/125 µm Multi-mode fiber
Single-mode fiber
Single-mode fiber
Transmission
Distance
500 m (1640 ft)
220 m (722 ft)
10 km (6 mi)
40 km (25 mi)
70 km (43.5 mi)
The 4-Port 10/100/1000BASE-T submodule provides four 10/100/1000 Mbps auto-negotiation service ports.
Figure 5 illustrates the 4-port 10/100/1000BASE-T submodule.
Figure 5 4-Port 10/100/1000BASE-T Submodule
3C16873
1 Ethernet port
2 Ethernet port LEDs
14 CHAPTER 1: SWITCH 7750 COMPONENTS
Ta bl e 14 describes the 4-port 10/100/1000BASE-T submodule LEDs.
Ta bl e 14 4-Port 10/100/1000BASE-T Submodule LEDs
LED Description
LINK Off — The link is not operating.
ACT Off — No data is being transmitted or received.
Ta bl e 15 lists specifications of the 4-port 10/100/1000BASE-T submodule.
Ta bl e 15 4-Port 10/100/1000BASE-T Submodule Specifications
Specification Description
Connector type RJ-45
Number of ports 4
Port speed 1000 Mbps full duplex
Cable and maximum transmission distance
On — The link is operating normally.
Green flashing — Data is being transmitted or received.
100 Mbps half/full duplex 10 Mbps half/full duplex MDI/MDI-X auto-sensing
Category 5 twisted pair up to 100 m (328 ft)
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45 connector and MDI/MDI-X pinout details.

I/O Modules The Switch 7750 provides multiple slots for I/O modules below the Fabric slots.

The following I/O modules are supported:
48-port 10/100BASE-T FE PoE Module (3C16891)
48-port 10/100/1000BASE-T PoE Module (3C16890)
48-port 10/100BASE-TX FE Module (3C16889)
48-port 10/100/1000BASE-T Module (3C16888)
48-port 100BASE-X SFP Module
20-Port 10/100/1000BASE-T Module (3C16863A)
20-Port 1000BASE-X-SFP Module (3C16862A)
12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP Module (3C168916)
12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T Module (3C186917)
8-port 1000BASE-X GBIC Module (3C16858)
8-port 10/100/1000BASE-T GE Module (3C16859)
100Base-FX SFP mode (3C16865915)
Consider the following when selecting I/O modules:
You can configure several I/O modules of the same type
Any combination of I/O modules can be inserted but only PoE I/O modules
provide the features of power over Ethernet.
I/O Modules 15
1
2
You must select I/O module port cables that are compatible with each installed
I/O module
48-port 10/100BASE-T FE
PoE Module
The 48-port 10/100BASE-T FE PoE module provides 48 10/100 Mbps auto-sensing Ethernet ports that provide a remote power supply to powered devices
Figure 12illustrates the 48-port 10/100BASE-T FE PoE module.

Figure 6 48-port 10/100BASE-T FE PoE Module

3C16891
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100BASE-T FE PoE module.
Figure 7 Front Panel of the 48-port 10/100BASE-T FE PoE Module
3C16891
1 Ethernet port
2 Ethernet port LED
Ta bl e 22 describes the 48-port 10/100BASE-T FE PoE Module LEDs.
Ta bl e 16 module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
Ta bl e 23 describes the specifications for the 48-port 10/100BASE-T FE PoE module.
Ta bl e 17 Specifications for the 48-port 10/100BASE-T FE PoE Module
Specification Description
CPU MPC8241
BootROM 512 KB
SDRAM 128 M
Dimensions (L X W) 366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 35 W
Connector RJ-45
Number of ports 48
16 CHAPTER 1: SWITCH 7750 COMPONENTS
12
Table 17 Specifications for the 48-port 10/100BASE-T FE PoE Module (continued)
Specification Description
Port transmission speed 10/100 Mbps half-/full-duplex MDI/MDI-X auto-sensing
Cables and maximum transmission distance
Maximum power each port provides
Compliance IEEE802.3
100 m (328 ft.)
15.4 W
IEEE802.3u IEEE802.3x IEEE802.3ad IEEE802.1p IEEE802.1D IEEE802.1Q IEEE802.1X IEEE802.1s IEEE802.1w IEEE802.3af
48-port
10/100/1000BASE-T PoE
Module
The 48-port 10/100/1000BASE-T PoE module provides 48 10/100/1000 Mbps auto-sensing Ethernet ports that provide a remote power supply to powered devices.
Figure 12illustrates the 48-port 10/100/1000BASE-T PoE module.

Figure 8 48-port 10/100/1000BASE-T PoE Module

3C16890
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE-T PoE module.
Figure 9 Front Panel of the 48-port 10/100/1000BASE-T PoE Module
3C16890
1 Ethernet port
2 Ethernet port LED
I/O Modules 17
Ta bl e 22 describes the 48-port 10/100/1000BASE-T PoE module LEDs.
Ta bl e 18 48-port 10/100/1000BASE-T PoE Module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
Ta bl e 23 describes the specifications of the 48-port 10/100/1000BASE-T PoE module.
Ta bl e 19 Specifications for the 48-port 10/100/1000BASE-T PoE Module
Specification Description
CPU MPC8241
BootROM 512 KB
SDRAM 128 M
Dimensions (L X W) 366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 70 W
Connector RJ-45
Number of ports 48
Port transmission speed 10/100/1000 Mbps half-/full-duplex
Cables and maximum transmission distance
Compliance IEEE802.3ab
MDI/MDIX auto-sensing
Category 5 twisted pair with a maximum distance of 100 m (328 ft.)
IEEE802.3 IEEE802.3i IEEE802.3x IEEE802.1p IEEE802.1D IEEE802.1Q IEEE802.1X IEEE802.1s IEEE802.1w
48-port 10/100BASE-TX
FE Module
The 48-port 10/100BASE-TX FE module provides 48 10/100 Mbps auto-sensing Ethernet electrical ports.
Figure 10 illustrates the 48-port 10/100BASE-T FE module.
Figure 10 48-port 10/100BASE-T FE Module
18 CHAPTER 1: SWITCH 7750 COMPONENTS
12
Figure 11 illustrates the front panel and LEDs of the 48-port 10/100BASE-TX FE module.
Figure 11 Front Panel of the 48-Port 10/100BASE-TX FE module
1 Ethernet port
2 Ethernet port LED
Each 100 Mbps Ethernet port has a green LED, indicating LINK/ACTIVE status.
Ta bl e 20 describes the 48-port 10/100BASE-TX FE module LED.
Ta bl e 20 48-Port 10/100BASE-TX FE module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
Ta bl e 21 describes the specifications of the 48-port 10/100BASE-TX FE module.
Ta bl e 21 Specifications for the 48-Port 10/100BASE-TX FE Module
Specification Description
CPU MPC850
BootROM 512 KB
SDRAM 64 MB
Dimensions (L X W) 366.7 x 340 mm (14.5 x 13.4 in)
Maximum power consumption
Connector RJ-45
Number of ports 48
Port transmission speed
Cables and maximum transmission distance
Compliance IEEE802.3
75 W
10/100 Mbps half/full duplex MDI/MDIX auto-sensing
Cables are 2 100-ohm Category-5 twisted pairs up to 100 m (300 ft).
IEEE802.3u IEEE802.3x IEEE802.3ad IEEE802.1p IEEE802.1D IEEE802.1Q IEEE802.1X IEEE802.1s IEEE802.1w
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45 connector and MDI/MDI-X pinout details.
I/O Modules 19
12
48-port
10/100/1000BASE-T
Module
The 48-port 10/100/1000BASE-T module provides 48 10/100/1000 Mbps auto-sensing Ethernet electrical ports.
Figure 12 illustrates the 48-port 10/100/1000BASE-T module.

Figure 12 48-port 10/100/1000BASE-T Module

3C16888
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE-T module.
Figure 13 Front Panel of the 48-port 10/100/1000BASE-T Module
3C16888
1 Ethernet port
2 Ethernet port LED
Ta bl e 22 describes the 48-port 10/100/1000BASE-T module LEDs.
Ta bl e 22 48-port 10/100/1000BASE-T Module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
Ta bl e 23 describes the specifications of the 48-port 10/100/1000BASE-T module.
Ta bl e 23 Specifications for the 48-port 10/100/1000BASE-T Module
Specification Description
CPU MPC8241
BootROM 512 KB
SDRAM 128 M
Dimensions (L X W) 366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 70 W
Connector RJ-45
Number of ports 48
Port transmission speed 10/100/1000 Mbps half-/full-duplex MDI/MDI-X
auto-sensing
Cables and maximum transmission distance
Category 5 twisted pair with a maximum transmission distance of 100 m (328 ft.)
20 CHAPTER 1: SWITCH 7750 COMPONENTS
12
Table 23 Specifications for the 48-port 10/100/1000BASE-T Module (continued)
Specification Description
Compliance 1EEE 802.3ab
1EEE 802.3 1EEE 802.3u 1EEE 802.3x 1EEE 802.1p 1EEE 802.1D 1EEE 802.1Q 1EEE 802.1X 1EEE 802.1s 1EEE 802.1w
48-port 100BASE-X SFP
Module
The 48-port 100BASE-X SFP module provides 48 100 Mbps full-duplex Ethernet optical ports.
Figure 14 illustrates the 48-port 100BASE-X SFP module.
Figure 14 48-port 48-port 100BASE-X SFP Module
3C16888
Figure 15 illustrates the front panel and LEDs of the 48-port 100BASE-X SFP module.
Figure 15 Front Panel of the 48-port 48-port 100BASE-X SFP Module
3C16888
1 Ethernet port
2 Ethernet port LED
Ta bl e 24 describes the 48-port 100BASE-X SFP module LEDs.
Ta bl e 24 48-port 100BASE-X SFP Module LED
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
Ta bl e 25 describes the specifications of the 48-port 100BASE-X SFP module.
Ta bl e 25 Specifications for the 48-port 100BASE-X SFP Module
Specification Description
CPU MPC8241
BootROM 512 KB
SDRAM 128 M
I/O Modules 21
Table 25 Specifications for the 48-port 100BASE-X SFP Module (continued)
Specification Description
Dimensions (L X W) 366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 36.5 W
Connector LC
Number of ports 48
SFP module 100BASE-FX-MM-SFP
Port transmission speed 100 Mbps full-duplex
Compliance 1EEE 802.3
100BASE-FX-SM-SFP 100BASE-FX-SM-LR-SFP 100BASE-FX-SM-VR-SFP
1EEE 802.3u 1EEE 802.3x 1EEE 802.3ad 1EEE 802.1p 1EEE 802.1D 1EEE 802.1Q 1EEE 802.1X 1EEE 802.1s 1EEE 802.1w
24-port 100BASE-FX
MMF FE Module
Ta bl e 26 lists the cables for the 48-port 100BASE-X (SFP) ports
Ta bl e 26 Cables for the 48-port 100BASE-X SFP Module
Central wave-
SFP module
100BASE-FX-MM-SFP 1310nm LC multimode optical fiber
100BASE-FX-SM-SFP 1310nm 15 km (9.3 mi)
100BASE-FX-SM-LR-SFP1310nm 9/125 µm single mode
100BASE-FX-SM-VR-SFP1550nm 70km (43 mi)
length Connector Matching cable
cable
optical fiber cable
Maximum transmission distance
2 km (1.2 mi)
40 km (24.9 mi)
The 24-port 100BASE-FX MMF FE module provides 24 100 Mbps multi-mode Ethernet optical port service channels.
Figure 16 illustrates the 24-port 100BASE-FX MMF FE module.
22 CHAPTER 1: SWITCH 7750 COMPONENTS
1
2
Figure 16 24-Port 100BASE-FX MMF FE Module
Each 100 Mbps optical port has a green LED, as shown in Figure 17.
Figure 17 Front Panel of the 24-Port 100BASE-FX MMF FE Module
1 Ethernet port
2 Ethernet port LED
Ta bl e 27 describes the status of the 24-port 100BASE-FX MMF FE module LEDs.
Ta bl e 27 24-Port 100BASE-FX MMF FE Module LEDs
LED Description
LINK/ACT Green — The port is connected.
Off — The port is not connected. Green flashing — Data is being transmitted or received.
The 24-port 100BASE-FX MMF FE module requires a 62.5/125 µm multi-mode optical fiber cable with an MT-RJ connector and a central wavelength of 1300 nm.
Ta bl e 28 describes the specifications of the 24-port 100BASE-FX MMF FE module.
Ta bl e 28 Specifications for the 24-Port 100BASE-FX MMF FE Module
Specification Description
CPU MPC850
BootROM 512 KB
SDRAM 64 MB
Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)
Maximum power consumption
Connector type MT-RJ
Number of ports 24
Port transmission speed 100 Mbps, full-duplex
55 W
I/O Modules 23
3C16863
12
Table 28 Specifications for the 24-Port 100BASE-FX MMF FE Module (continued)
Specification Description
Cables and maximum transmission distance
Compliance IEEE 802.3
62.5/125 µm multi-mode optical fiber up to 2 km (1.3 mi)
IEEE 802.3i
IEEE 802.3u IEEE 802.3x
20-Port
10/100/1000BASE-T
Module
The 20-Port 10/100/1000BASE-T module provides 20 10/100/1000BASE-T auto-sensing Ethernet ports.
Figure 18 illustrates the 20-Port 10/100/1000BASE-T Module.

Figure 18 20-Port 10/100/1000BASE-T Module

Figure 19 illustrates the front panel of the 20-port 10/100/1000BASE-T module.
Figure 19 Front Panel of the 20-Port 10/100/1000BASE-T Module
3C16863
1 Ethernet port
2 Ethernet port LED
Ta bl e 29 describes the 20-port 10/100/1000BASE-T module LEDs.
Ta bl e 29 20-Port 10/100/1000BASE-T Module LEDs
LED Description
LINK/ACT Off — The port is not operating.
On — The port is operating. Green flashing — The port is transmitting or receiving data
24 CHAPTER 1: SWITCH 7750 COMPONENTS
3C168623C16862
12
Ta bl e 30 lists specifications of the 20-port 10/100/1000BASE-T module.
Ta bl e 30 Specifications for the 20-Port 10/100/1000BASE-T Module
Specification Description
CPU MPC8241LZU200
BootROM 512 KB
SDRAM 64 MB
Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)
Power consumption 45 W
Connector RJ-45
Number of ports 20
Transmission rate 10 Mbps half/full duplex
Cable and maximum transmission distance
Compliance IEEE 802.3ab
100 Mbps half/full duplex 1000 Mbps full duplex
Category-5 twisted pair 100 m (300 ft)
IEEE 802.3 IEEE 802.3u IEEE 802.3x IEEE 802.1D IEEE 802.1Q
20-Port 1000BASE-X-SFP
Module
The 20-port 1000BASE-X-SFP module provides 20 1000 BASE-X full duplex ports and uses an SFP cable.
Figure 20 illustrates the 20-port 1000BASE-X-SFP module.

Figure 20 20-Port 1000BASE-X-SFP Module

Figure 21 illustrates the front panel of the 20-port 1000BASE-X-SFP module.
Figure 21 Front Panel of the 20-Port 1000BASE-X-SFP Module
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