3Com 1000BASE-SX GBIC User manual

®
2-Port 1000BASE-SX and
2-Port 1000BASE-LX Gigabit
Ethernet Interface Modules
Quick Start Guide
For the CoreBuilder™9000 Enterprise Switch
Interface Modules
Description
The 1000BASE-SX and 1000BASE-LX Gigabit Ethernet (GEN) Interface
Modules are 2-port interface modules for the CoreBuilder™9000
Enterprise Switch. These GEN Interface Modules serve as a 2-Gigabit
data channel between the Gigabit Ethernet Switch Fabric Module and
other IEEE 802.3z-compliant Gigabit Ethernet devices.
Key Features The GEN Interface Modules support the following key features:
■Two front panel IEEE 802.3z–compliant Gigabit Ethernet fiber-optic
ports that connect to a dedicated, non-blocking, redundant Gigabit
Ethernet backplane channel
■850nm multimode support on the 1000BASE-SX GEN Interface
Module
■1300nm single-mode support on the 1000BASE-LX GEN Interface
Module
■Management using the CoreBuilder 9000 Administration Console
(a command line interface) or Simple Network Management Protocol
(SNMP) applications by connecting through the Gigabit Ethernet
Switch Fabric Module

22-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
As shown in Figure 1, GEN Interface Modules are available in two
models:
■1000BASE-LX (order number 3CB9LG2SC). Ports on this module use
a 1300-nanometer, multimode/single-mode, optical transceivers
(colored blue) and SC connectors.
■1000BASE-SX (order number 3CB9LG2MC). Ports on this module
use an 850-nanometer, multimode, optical transceivers (colored
black) and SC connectors.
Figure 1 Front Panels of the GEN Interface Modules
Each GEN Interface Module has two ports on the front (see Figure 1) as
well as two ports on the rear of the module (not shown in Figure 1)
that connect to the chassis backplane. Because the front ports have a
pass-through function to the rear ports, they share port numbers
1 and 2 with the rear ports.
In the 16-slot chassis, you install modules vertically with the LEDs at the
top. In the 7-slot chassis, you install modules horizontally, as shown in
Figure 1.
3CB9LG2SC
TX
RX
1
2
1
2
TX
RX
MOD STAT
Model number
Ejector handle
Module Status LED
Port Status LEDs
Fiber-optic ports
(SC connectors)
3CB9LG2MC
TX
RX
1
2
1
2
TX
RX
MOD STAT
Ejector handle
1000BASE-LX
1000BASE-SX

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 3
Audience Description This guide is intended for trained technical personnel only. Do not
attempt to install, remove, or replace a CoreBuilder 9000 GEN Interface
Module if you have not had the proper training from 3Com. For
training information, call 1-800-NET-3COM.
Safety Precautions When you handle components in a CoreBuilder 9000 system, be sure
that you follow all safety precautions. To avoid electric shocks, burns, or
equipment damage, read and follow these warnings:
WARNING: Allow only trained service personnel to install, remove, or
replace a GEN Interface Module.
WARNING: Hazardous energy exists within the CoreBuilder system. Use
extreme caution when you install, remove, or replace a GEN Interface
Module.
When the system is on, never insert metal objects such as a screwdriver
or a finger with jewelry into open module slots.
When the system is on, do not touch any connections within the
chassis with your hands or fingers. Do not insert metal objects into the
backplane.
WARNING: To ensure optical safety when installing GEN Interface
Modules, comply with the following precaution:
Although the data communication lasers used in this product meet the
regulatory requirements for casual exposure to the eye, as with any
source of bright light, it is advised that you do not look into the light
source.
Laser Safety Information: IEC 825 and EN60825, Class 1 Laser
Device. For connection only to Class 1 Laser Devices.
FDA Class 1 Laser Device
This product complies with U.S. Department of Health and Human
Services Rules 21 CFR Subchapter J applicable at date of manufacture.
CLASS 1
LASER PRODUCT

42-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
ESD Safety Information
Electrostatic discharge (ESD) can damage components of the module.
ESD, which occurs when a GEN Interface Module is improperly
handled, can cause complete or intermittent failures.
CAUTION: To prevent ESD-related damage:
■Always wear an ESD wrist strap (not provided) when you handle a
GEN Interface Module, ensuring that the strap makes good skin
contact.
■Keep the GEN Interface Module in its antistatic bag until you are
ready to install it.
Handling Precautions When you handle a GEN Interface Module, follow these precautions:
■Always handle the module by its front panel only.
■Do not touch the components, pins, leads, or solder connections.
■Do not twist or otherwise force the module into the chassis when
you insert it into the module slot guides.
■Before you push the module into the chassis, make sure that the
module ejector handles are open.
■To slide the module into the 16-slot chassis, match the upper and
lower module guides; in the 7-slot chassis, match the left and right
module guides.
Unpacking
Instructions
Use the following procedure when you unpack a GEN Interface
Module:
1Verify that the GEN Interface Module is the correct product by
matching the order number that is listed on the shipping box label to
the order number that is listed on your sales invoice (3CB9LG2MC or
3CB9LG2SC).
2Remove the module, in its antistatic bag, from the shipping box.
3Ensure that the box also contains:
■CoreBuilder 9000 GEN Switch Fabric and GEN Interface Modules
Release Notes
■2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet
Interface Modules Quick Start Guide for the CoreBuilder 9000
Enterprise Switch (this guide)

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 5
If the listed contents are not in the shipping box, contact your supplier.
All shipping boxes are reusable. After you remove the contents, replace
the packing materials in the box and store it for future use.
4Remove the GEN Interface Module from its antistatic bag and inspect it
for physical damage.
CAUTION: Handle the module by the front panel only. Do not touch
any components, pins, leads, or solder connections.
If the module appears to be damaged, replace it in its antistatic bag
and shipping box, and contact your supplier.
Installation
Prerequisites
Before you install a GEN Interface Module, make sure that the
CoreBuilder 9000 chassis is properly installed in a rack, on a table, or
on a shelf, according to the instructions in the CoreBuilder 9000
Enterprise Switch Getting Started Guide and the 16-Slot Chassis Quick
Installation Guide or 7-Slot Chassis Quick Installation Guide.
You need a flat-blade screwdriver to complete the module installation.

62-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Order of Installation
Activities
3Com recommends that you install CoreBuilder 9000 modules in the
following order:
1Management Modules
One Enterprise Management Engine (EME) is required (order number
3CB9EME). A second EME or an Enterprise Management Controller
(EMC) is optional (order number 3CB9EMC). By installing the
management modules first, you can complete the required system-level
setup procedures before you add other modules to the chassis. For
more information, see the following documents:
■Enterprise Management Engine User Guide
■Enterprise Management Engine Quick Start Guide
■Enterprise Management Controller Quick Start Guide
2Switch Fabric Modules
Because you manage a GEN Interface Module through the primary GEN
Switch Fabric Module, you must install one GEN Switch Fabric Module
first. In the 16-slot chassis, a second GEN Switch Fabric Module is
optional. See the Gigabit Ethernet Switch Fabric Module Quick Start
Guide for more information.
3Interface Modules
Install all interface modules, such as the 2-port 1000BASE-SX GEN
Interface Module, the 2-port 1000BASE-LX GEN Interface Module, or
the 36-port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching
Module, last. You can install interface modules in any order, but see
your module documentation for chassis slot restrictions and
recommendations. For restrictions and recommendations for the GEN
Interface Modules, see “Module Placement in the Chassis” next in this
guide.

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 7
Module Placement in
the Chassis
Note the following chassis slot restrictions and recommendations when
you choose a chassis slot for a GEN Interface Module.
In the CoreBuilder 9000 7-slot chassis:
■Do not install the module in slot 7. This slot is reserved for a GEN
Switch Fabric Module.
■Install the module in slot 1, 2, 3, 4, 5, or 6.
In a CoreBuilder 9000 16-slot chassis:
■Do not install the module in slot 8 or 9. These slots are reserved for
GEN Switch Fabric Modules.
■To optimize backplane performance, install the module in slot 1, 2,
3, 4, 5, 6, 7, 10, 11, or 12.
■3Com recommends that you do not install the module in slot 13,
14, 15, or 16, because these slots only have one connection to the
backplane and the GEN Switch Fabric Modules (see Table 2). If you
install a GEN Interface Module into one of these slots, you can only
use one of the module’s front panel ports. The GEN Switch Fabric
Module automatically disables the second port.
Table 1 and Table 2 list the relationship between the 24 Gbps Gigabit
Ethernet (GEN) Switch Fabric Module (3CB9FG24) and the interface
module slots in the 7-slot chassis and the 16-slot chassis, respectively.
Use the information to help select a slot for your module, as well as for
administration purposes after you have completed the installation.

82-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Table 1 Mapping the GEN SFM* and the 2-port GEN Interface Module to the 7-slot Chassis
* SFM = Switch Fabric Module
Chassis Slot
Number
Number of SFM
Backplane Ports
Allocated to Slot
2-port GEN
Interface Module
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
14; only 2 are accessed
by this module 1
2
1
2
1
2
24; only 2 are accessed
by this module 1
2
5
6
3
4
34; only 2 are accessed
by this module 1
2
9
10
5
6
44; only 2 are accessed
by this module 1
2
13
14
7
8
54; only 2 are accessed
by this module 1
2
17
18
9
10
64; only 2 are accessed
by this module 1
2
21
22
11
12
7Reserved for an SFM Not applicable Not applicable Not applicable

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 9
Table 2 Mapping the GEN SFM* and the 2-port GEN Interface Module to the 16-slot Chassis
* SFM = Switch Fabric Module
Chassis Slot
Number
Number of SFM
Backplane Ports
Allocated to Slot
2-port GEN
Interface Module
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
1 2 1
2
1
2
1
2
2 2 1
2
3
4
3
4
3 2 1
2
5
6
5
6
4 2 1
2
7
8
7
8
5 2 1
2
9
10
9
10
6 2 1
2
11
12
11
12
7 2 1
2
13
14
13
14
8Reserved for an SFM Not applicable Not applicable Not applicable
9Reserved for an SFM Not applicable Not applicable Not applicable
10 2 1
2
15
16
15
16
11 2 1
2
17
18
17
18
12 2 1
2
19
20
19
20
13 1 1 21 21
14 1 1 22 22
15 1 1 23 23
16 1 1 24 24

10 2-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Installing the GEN
Interface Module
Follow this procedure to install a GEN Interface Module:
1Before you start the installation process, read “Safety Precautions” and
“Handling Precautions” earlier in this guide.
2Select a chassis slot for your module, following the restrictions and
recommendations in “Module Placement in the Chassis” earlier in this
guide.
3To expose the selected chassis slot, remove the blank faceplate that
covers the slot.
Save this faceplate, because you may need to cover an empty slot in
the future. Empty slots must be covered to ensure proper air flow and
cooling in the chassis.
4Open the module ejector handles.
5Begin to insert the module:
■In the 7-slot chassis, hold the module horizontally with the LEDs on
the left and insert the module using the guides on the left and the
right of the slot. See Figure 2.
■In the 16-slot chassis, hold the module vertically with the LEDs at
the top and insert the module using the guides on the top and the
bottom of the slot. See Figure 3.
CAUTION: Be careful not to twist or bend the module when you insert
it.
6Slide the module into the chassis by pushing firmly at the two ends of
the front panel near the ejector handles.
WARNING: Hazardous energy levels exist inside of the chassis. Do not
place hands or objects into the chassis or touch components on an
inserted module.

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 11
Figure 2 Installing the GEN Interface Module in the 7-Slot Chassis
R
3CB9FG24
PRI
MOD STAT
SEC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
3CB9FG24
PRI
MOD STAT
SEC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
3CB9FG24
PRI
MOD STAT
SEC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
CoreBuilder9000
9
3CB9LG2SC
TX
RX
1
2
1
2
TX
RX
MOD STAT
Spring-loaded
screws
GEN Interface Module

12 2-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Figure 3 Installing the GEN Interface Module in the 16-Slot Chassis
1 2 3 4 5 6 7 8 12 13 169 10 11 14 15
R
CoreBuilder9000
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MOD STAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9LG2MC
TX
RX
1
2
1
2
TX
RX
MOD STAT
Spring-loaded
screw
GEN
Interface
Module
Spring-loaded
screw

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 13
7To engage the module connectors and the chassis backplane
connectors, apply forward pressure to the module front panel.
You feel a slight resistance as the connectors engage.
CAUTION: If the resistance is too great, the module connectors and
the backplane connectors may not be aligned. Forcing the module into
place can damage the module connectors and backplane connectors. If
necessary, remove and reinsert the module, ensuring that the
connectors are properly aligned. Do not tighten the spring-loaded
screws to seat the module.
If modules are already installed to the left of this module in a 16-slot
chassis or installed beneath this module in a 7-slot chassis, you may
need to apply sideways or downward pressure on that adjacent module
to have your module line up correctly in its slot. Applying this pressure
compresses the thin strip of rubber-like material (which exists for
electromagnetic interference purposes) at the edge of the front panel
of the adjacent module.
8Ensure that the module remains fully seated in the backplane
connectors while you close the ejector handles.
Use one hand to hold the module in place, and use your other hand to
close one ejector handle at a time until the handles are parallel with
the front panel.
9To secure the module front panel to the chassis, tighten the
spring-loaded screws to a torque specification of 3–5 inch-pounds.
CAUTION: To ensure adequate cooling air flow and continued product
safety agency compliance, install blank faceplates over all empty slots.

14 2-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Verifying Module
Operation
The GEN Interface Modules each have one Module Status LED and two
Port Status LEDs. Watch the LEDs during system power-on to verify
proper module operation. During the power-on diagnostic test, both
the Module Status and Port Status LEDs flash for approximately 1
second, and then reflect the active status of the module as described in
Table 3.
.
Table 3 Module and Port Status LED Indicators
LED State and Color Description
Module Status Green Power is on (normal operation).
Off No power.
Port Status Green Port is enabled and link is up.
Flashing Green ■Port is receiving or transmitting
packets.
■Port is cabled but the switch fabric
module is down or unavailable.
Off Link is disabled or port is not cabled.

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 15
Managing the
Module
You configure and manage the front panel ports on the GEN Interface
Module using the Administration Console, which is a command line
interface that you access from a terminal that is connected through the
Enterprise Management Engine (EME).
At the command prompt, you do not connect directly to a GEN
Interface Module; you manage GEN Interface Modules by connecting to
the primary GEN Switch Fabric Module backplane ports that correspond
to where you have installed the GEN Interface Module in the chassis. To
learn how GEN Switch Fabric Module backplane ports are assigned to
chassis slots, see Table 1 and Table 2 earlier in this guide.
To manage GEN Interface Module ports from the Administration
Console:
1Log in to the EME.
For information about logging in to the EME, see the CoreBuilder 9000
Enterprise Management Engine User Guide.
2At the prompt, enter:
connect <slot>.1
Where <slot> is the slot number of the module that you want to
manage, and the number after the decimal point is a subslot number
(the subslot number is always 1).
Because you manage the GEN Interface Modules through the GEN
Switch Fabric Module, you always connect to slot 7 in the
CoreBuilder 9000 7-slot chassis and to slot 8 or slot 9 in the
CoreBuilder 9000 16-slot chassis.
This command connects you to the primary GEN Switch Fabric Module,
and the Administration Console displays the top-level menu prompt.
3To manage a GEN Interface Module port, enter commands for the
corresponding backplane port on the primary GEN Switch Fabric
Module.
For information about module commands, see the Command Reference
Guide.

16 2-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Specifications The following tables list specifications for the GEN Interface Modules:
1000BASE-SX (3CB9LG2MC) Module Cabling Requirements
1000BASE-LX (3CB9LG2SC) Module Cabling Requirements
Due to the dual media (single-mode and multimode) support of the
1000BASE-LX module, an offset-launch mode-conditioning patch cord
assembly is required to meet the specifications for multimode (MMF)
operation. This patch cord is not required for single mode (SMF)
operation. Patch cords come in various lengths and can be ordered
from Siecor Operations (800-743-2675, fax: [phone]). The
following table lists the part number information:
Fiber Type
Modal Bandwidth
(MHz•km) Segment Length
62.5/125 microns MMF 160 Up to 220 m (722 ft)
62.5/125 microns MMF 200 Up to 275 m (902 ft)
50/125 microns MMF 400 Up to 500 m (1,640 ft)
50/125 microns MMF 500 Up to 550 m (1,804 ft)
10/125 microns SMF Not applicable Not supported
Fiber Type
Modal Bandwidth
(MHz•km) Segment Length
62.5/125 microns MMF 500 Up to 550 m (1,804 ft)
50/125 microns MMF 400 Up to 550 m (1,804 ft)
50/125 microns MMF 500 Up to 550 m (1,804 ft)
10/125 microns SMF Not applicable Up to 5 km (16,404 ft)
Patch Cord Cable
Assembly Part Number Description
39575802KMCXXXM* Mode-conditioning patch cord for 62.5 micron cables
39575802CMCXXXM* Mode-conditioning patch cord for 50 micron cables
* XXX = the length of the cable in meters.

2-Port 1000BASE-SX and 2-Port 1000BASE-LX Gigabit Ethernet Interface Modules Quick Start Guide 17
Environmental Requirements
Physical Specifications
Power Specifications
Regulatory Compliance
Operating temperature 0 to 50 °C (32 to 122 °F)
Operating humidity 10% to 90% relative humidity, noncondensing
Storage temperature –30 to 70 °C (–22 to 158 °F)
Storage humidity 10% to 95% relative humidity, noncondensing
Module Dimensions Weight
1000BASE-SX
(3CB9LG2MC)
2.54 cm x 38.81 cm x 33.50 cm
1 in. x 15.28 in. x 13.19 in.
1.81 kg
4.85 lb
1000BASE-LX
(3CB9LG2SC)
2.54 cm x 38.81 cm x 33.50 cm
1 in. x 15.28 in. x 13.19 in.
1.81 kg
4.85 lb
Voltage Minimum Maximum Current
+5 V 4.75 V 5.25 V 1 A
+3.3 V 3.14 V 3.47 V 4.54 A
+12 V 11.4 V 12.6 V 0.125 A
Safety
■CSA 22.2 No. 950
■EN60950
■IEC950
■UL1950
Emissions
■FCC 47 CFR Part 15 Class A
■ICES003 Class A
■VCCI Class 1
■EN55022 Class A
■EN50082-1
■AS3548
■CISPR 22 Class A

18 2-PORT 1000BASE-SX AND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE
Related
CoreBuilder 9000
Documents
For detailed information about using and managing GEN Interface
Modules, see the following documents:
■CoreBuilder 9000 Implementation Guide
■Command Reference Guide
■CoreBuilder 9000 Enterprise Management Engine User Guide
To obtain the software code installation procedure as well as known
problem information for GEN Interface Modules, see the
CoreBuilder 9000 GEN Switch Fabric and GEN Interface Modules
Release Notes.
For information about installing and powering on the system, see the
following documents:
■CoreBuilder 9000 Enterprise Switch Getting Started Guide
■16-Slot Chassis Quick Installation Guide for the CoreBuilder 9000
Enterprise Switch
■7-Slot Chassis Quick Installation Guide for the CoreBuilder 9000
Enterprise Switch
■16-Slot Chassis Power Supply Installation Guide for the
CoreBuilder 9000 Enterprise Switch
■7-Slot Chassis Power Supply Installation Guide for the
CoreBuilder 9000 Enterprise Switch
You can view and print these and other CoreBuilder 9000 documents
from the:
■3Com Web site — http://support.3com.com/nav/switches.htm
■CoreBuilder 9000 Documentation CD-ROM
The CoreBuilder 9000 Documentation CD-ROM is included when
you order a CoreBuilder 9000 Starter Kit (order number 3CB9PG1 or
3CB9PG2). You can also order the CD-ROM separately (order
number 3CB9DB).