3Com Switch Switches Hub User Manual

DATA SHEET  
®
OfficeConnect Switches and Hubs  
Easy to Install and Use  
Free Telephone Support  
Key Benefits  
Enjoy plug-and-play simplicity.  
3Com offers telephone assistance dur-  
ing the first 90 days, including instal-  
lation and general troubleshooting.  
Simple Troubleshooting  
Get at-a-glance network status infor-  
mation from front-panel diagnostic  
LEDs, including a unique Alert LED.  
Engineered for Small-Business Needs  
The OfficeConnect family is the first  
solution designed specifically for  
small-office operations—often imi-  
tated but never equaled by other  
network vendors.  
Compact Design  
Save valuable small-office space with  
compact, ergonomic, and clippable  
design.  
Lifetime Limited Warranty  
Ensures peace of mind when purchas-  
ing OfficeConnect products; includes  
power adapters.  
Specifically designed for small busi-  
nesses and offices, 3Com OfficeConnect  
traffic. OfficeConnect Dual Speed  
Ethernet switches and hubs feature  
®
®
switches and hubs provide businesses autosensing technology, allowing  
with an integrated system of small-  
office networking. By installing a  
users to migrate to higher speeds  
when needed. They are available in a  
LAN, users can work more effectively variety of port densities—from 4 to  
with file and print sharing and reduce 16 ports.  
costs by sharing expensive resources  
OfficeConnect switches and hubs are a  
as printers.  
core part of the OfficeConnect family,  
OfficeConnect products provide con-  
providing small businesses with the  
nectivity for every business need. For power to share information, set up  
the value-conscious user, standard  
Ethernet hubs are ideal, while Fast  
Ethernet switches and hubs provide  
additional speed for high-volume  
powerful, comprehensive servers,  
connect remote offices, and access  
the Internet.  
 
OFFICECONNECT® SWITCHES AND HUBS  
3Com recommends using Category 5  
cables and that the cable (B) between  
the Fast Ethernet hub is not longer  
than 5 m (16.4 ft). This allows the  
maximum hub-to-workstation cable  
length (A or C) of 100 m (328 ft) to be  
used, as shown.  
Fast Ethernet  
Fast Ethernet is based on the Ethernet  
standard yet runs at 10 times the speed  
(100 Mbps). It is now one of the most  
popular high-speed technologies because  
of its cost effectiveness, stability, and  
compatibility with existing Ethernet  
LAN environments. Fast Ethernet  
switching allows dedicated performance  
between two devices.  
The total length of cable (A+B+C  
below) between two workstations  
and a nonrepeater piece of equipment  
(such as a switch) must not exceed  
205 m (672 ft). Each cable (A, B, or C)  
must not exceed 100 m (328 ft).  
100 Mbps link  
Example:  
These rules do not  
apply to Fast  
Ethernet switches.  
100 m  
(328 ft)  
You can connect  
as many  
OfficeConnect  
switches together  
as your business  
requires.  
5 m  
(16.4 ft)  
B
100 m  
(328 ft)  
A
C
3
 
OFFICECONNECT® SWITCHES AND HUBS  
OfficeConnect Dual Speed Switches  
allow dedicated, high-speed connec-  
tions at either 10BASE-T or 100BASE-  
TX, making them ideal for connecting  
servers or multiple hubs in small  
businesses or offices and providing a  
flexible migration path. They provide  
expandable connections for 5, 8, or  
16 users or networked devices.  
OfficeConnect Dual Speed  
Switches  
OfficeConnect Dual Speed Switches  
are designed for small businesses that  
want high network performance to  
exchange larger data files and images,  
and access real-time information.  
OfficeConnect Dual Speed Switch 16  
OfficeConnect  
Dual Speed Switches  
10/100  
autosensing memory  
ports  
Buffer  
Autonegotia- LED  
ting full- and indicators  
half-duplex  
Priority  
queuing  
MAC  
addresses  
supported  
MDI/MDIX  
Forwarding  
method  
Telephone  
support and  
lifetime  
FCC Class B External  
power  
supply  
ports  
limited  
warranty  
OfficeConnect Dual Speed Switch 5  
(3C16790)  
A low port density, high-performance,  
Fast Ethernet switch ideal for boosting  
network performance with multiple hub  
aggregation or server connection.  
5
1 M  
1 M  
2 M  
All 5  
All 8  
All 16  
Alert, Power,  
1,024  
1,024  
2,048  
Auto  
Store &  
Forward  
11 W  
Duplex, Port  
status (activity,  
connection  
speed)  
OfficeConnect Dual Speed Switch 8  
(3C16791)  
A popular switch ideal for connecting  
servers, multiple hubs, or desktops for  
small businesses that use bandwidth-  
intensive applications.  
8
Alert, Power,  
Duplex, Port  
status (activity,  
connection  
speed)  
Auto  
Store &  
Forward  
11 W  
OfficeConnect Dual Speed Switch 16  
(3C16735B)  
16  
Alert, Power,  
Activity,  
Manual  
Store &  
Forward  
14.4 W  
Provides high-performance switching  
for bandwidth-intensive applications.  
Duplex,  
Speed  
the flexibility to connect devices at  
either speed—automatically assigning  
power where possible and offering a  
smooth transition from 10 Mbps to  
100 Mbps.  
OfficeConnect Dual Speed Hubs  
The OfficeConnect family of dual  
speed hubs provides full 100 Mbps  
performance and is designed for small  
businesses that want more performance  
from their network. This family of  
hubs delivers quick exchange of data  
between PCs and swift downloading  
from the network. OfficeConnect  
Dual Speed Hubs feature 10/100  
Each hub features plug-and-play  
OfficeConnect Dual Speed Hub 16  
installation, requires no configuration,  
has an easy-to-read, front-panel dis-  
play with diagnostic LEDs. All hubs  
are backed by 3Coms lifetime limited  
warranty and 90-day telephone support.  
autosensing technology and provide  
OfficeConnect  
Dual Speed Hubs  
10/100  
autosensing  
ports  
LED indicators  
MAC addresses  
supported  
MDI/MDIX  
port  
Telephone  
FCC Class B  
External  
power supply  
support and  
lifetime limited  
warranty  
OfficeConnect Dual Speed Hub 8  
(3C16750B)  
A popular hub combining Fast Ethernet  
performance with the flexibility to expand  
8
Alert, Power,  
Network  
utilization,  
Port status,  
Collision  
1,024  
1,024  
14.4 W  
14.4 W  
an existing Ethernet network to Fast Ethernet.  
OfficeConnect Dual Speed Hub 16  
(3C16751B)  
16  
Alert, Power,  
Network  
Ideal for Fast Ethernet connectivity with  
the flexibility to expand an existing Ethernet  
network to Fast Ethernet.  
utilization,  
Port status,  
Collision  
4
 
OFFICECONNECT® SWITCHES AND HUBS  
want to add additional users to a  
10BASE-T network. OfficeConnect  
hubs offer compatibility with legacy  
coax networks and provide connections  
for 4, 8, or 16 users or networked  
devices.  
OfficeConnect Ethernet Hubs  
The OfficeConnect family of Ethernet  
hubs is specifically designed for small  
businesses with basic networking  
requirements, such as file or periph-  
eral sharing, or for those who simply  
OfficeConnect Ethernet Hub 8  
OfficeConnect  
Ethernet Hubs  
10BASE-T  
RJ-45  
10BASE-T  
coax  
10BASE-T AUI LED indicators Network  
MDI-MDIX  
port  
Telephone  
FCC Class B  
External  
power  
supply  
utilization  
(LED)  
support and  
lifetime lim-  
ited warranty  
OfficeConnect Ethernet Hub 4 (3C16704A)  
A low-cost, entry-level hub, providing basic  
Ethernet connectivity.  
4
11 W  
11 W  
11 W  
11 W  
11 W  
OfficeConnect Ethernet Hub 4C (3C16703A)  
Ideal for entry-level networks requiring  
alternative media connectivity.  
4
1
1
OfficeConnect Ethernet Hub 8 (3C16700A)  
A popular entry-level hub providing basic  
Ethernet connectivity.  
8
OfficeConnect Ethernet Hub 8C (3C16701A)  
Ideal hub for businesses wanting to expand their  
existing coaxial network.  
8
1
1
OfficeConnect Ethernet Hub 16C (3C16702A)  
Provides expanded network capacity and  
connectivity to legacy coaxial networks.  
16  
5
 
OFFICECONNECT® SWITCHES AND HUBS  
OfficeConnect Switches and Hubs Features  
10/100 autosensing ports  
Allows users to connect at either 10 Mbps or 100 Mbps to the switch or hub. The  
switch or hub will operate at the highest speed possible, optimizing network per-  
formance and user flexibility.  
Alert LED  
A unique LED present on all OfficeConnect switches and hubs provides additional  
diagnostic information.  
Auto MDI/MDIX  
This feature, available on new OfficeConnect Dual Speed Switch 5 (3C16790) and  
Switch 8 (3C16791), eliminates most common cabling problems (see MDI/MDIX  
push button switch).  
Compact and clippable design New, one-piece clipping system lets users connect up to four units in a stack.  
External power supply  
Provides more flexibility and reduces power requirements in the product, eliminating  
the need for a noisy fan.  
FCC Class B  
Indicates that a product is certified for use in domestic as well as office environments  
(more stringent classification than Class A).  
Fully compatible with leading OfficeConnect units support Novell NetWare, Microsoft Windows 95, 98, 2000,  
operating systems  
Windows NT, and other leading software systems, giving the widest range of back-  
ward compatibility with existing office software.  
Full duplex (switches only)  
Automatically doubles the throughput (to 20 Mbps or 200 Mbps) when ports are  
connected to other full-duplex devices or ports.  
Lifetime limited warranty and Provides complete piece of mind.  
telephone support  
MDI/MDIX push button switch Enables direct connection to a server, end station, or another switch or hub, using  
regular straight-through cables.  
Network utilization meter  
(available on most  
Indicates how much of the network bandwidth is in use. These LEDs are continually  
updated to show when the network needs more bandwidth.  
OfficeConnect hubs)  
Priority queuing  
(OfficeConnect Dual Speed  
Switches 5 and 8)  
Ensures that real-time applications (such as audio or video) take priority so they can  
run effectively, even during bursts of high traffic load.  
OfficeConnect LED Indicators  
Alert LED  
Port Status LEDs  
(Orange)  
(Green/Yellow) Indicate the status  
of each port. If green, there is a  
link present at 100 Mbps. If  
yellow, there is a link present at  
10 Mbps. If the LED is off,  
nothing is connected. Flashing  
of an LED indicates activity  
over that link.  
Alerts you to  
excessive  
network use  
or an isolated  
(partitioned)  
10BASE-T and  
100BASE-TX  
port.  
Duplex Indicator  
(Orange) If the LED is  
orange, the link is  
running at full duplex.  
If the LED is off but  
there is a link on that  
port, that link is  
As this front view of the  
OfficeConnect Fast Ethernet Hub  
8 illustrates, each OfficeConnect  
unit offers a variety of LED  
indicators, including an Alert  
LED to allow quick monitoring  
of hub and network activity.  
The Alert LED gives users  
Power LED  
(Green) Indicates  
that the power  
supply to the  
unit is present.  
running at half duplex.  
immediate notification of  
problems, such as excessive  
network use, without requiring  
special technical knowledge.  
6
 
OFFICECONNECT® SWITCHES AND HUBS  
OfficeConnect Ethernet Hub 8C (10BASE-T Hub)  
3C16701A  
OfficeConnect Hubs  
OfficeConnect hubs come with a user guide, power  
adapter, one-piece clipping system, and rubber feet.  
Specifications  
Connectors:  
8 RJ-45 ports for 10BASE-T twisted pair; one BNC  
port for 10BASE2 thin Ethernet (50 ohm)  
OfficeConnect Ethernet Hub 4 (10BASE-T Hub)  
3C16704A  
Dimensions:  
Connectors:  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in) + 15.2 mm (0.6 in) for  
coaxial port  
4 RJ-45 ports for 10BASE-T twisted pair  
Dimensions:  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in)  
Weight: 500 g (1.1 lb)  
Weight: 550 g (1.2 lb)  
Power: 11 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Power: 11 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Environmental: EN 60068 (IEC 68)  
Safety:  
OfficeConnect Ethernet Hub 16C (10BASE-T hub)  
3C16702A  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Connectors:  
OfficeConnect Ethernet Hub 4C (10BASE-T Hub)  
3C16703A  
16 RJ-45 ports for 10BASE-T twisted pair; one  
BNC port for 10BASE2 thin Ethernet (50 ohm)  
Connectors:  
4 RJ-45 ports for 10BASE-T twisted pair; one BNC  
port for 10BASE2 thin Ethernet (50 ohm); one AUI  
Dimensions:  
Width: 228 mm (9.1 in)  
Height: 60.6 mm (2.4 in)  
Depth: 185.4 mm (7.3 in)  
Weight: 960 g (2.1 lb)  
Dimensions:  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in)  
Weight: 500 g (1.1 lb)  
Power: 11 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Power: 11 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Environmental: EN 60068 (IEC 68)  
Safety:  
OfficeConnect Dual Speed Hub 8 (10BASE-T/  
100BASE-TX Hub) 3C16750B  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Connectors:  
OfficeConnect Ethernet Hub 8 (10BASE-T Hub)  
3C16700A  
8 RJ-45 10BASE-T/100BASE-TX ports  
Connectors:  
Dimensions:  
8 RJ-45 ports for 10BASE-T twisted pair  
Width: 228 mm (9.1 in)  
Height: 60.6 mm (2.4 in)  
Depth: 185.4 mm (7.3 in)  
Weight: 960 g (2.1 lb)  
Dimensions:  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in)  
Weight: 500 g (1.1 lb)  
Power: 33 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Power: 11 VA  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3; FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
7
 
OFFICECONNECT® SWITCHES AND HUBS  
OfficeConnect Dual Speed Hub 16 (10BASE-T/  
100BASE-TX Hub) 3C16751B  
OfficeConnect Dual Speed Switch 8 (10BASE-T/  
100BASE-TX Hub) 3C16791  
Specifications (continued)  
Connectors:  
Connectors:  
16 RJ-45 10BASE-T/100BASE-TX ports  
8 RJ-45 10BASE-T/100BASE-TX ports  
Dimensions:  
Dimensions:  
Width: 228 mm (9.1 in)  
Height: 60.6 mm (2.4 in)  
Depth: 185.4 mm (7.3 in)  
Weight: 1000 g (2.2 lb)  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in)  
Weight: 600 g (1.3 lb)  
Power: 53 VA  
Power: 11 VA  
Functional:  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3, FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3, FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
Environmental: EN 60068 (IEC 68)  
Safety:  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
OfficeConnect Switches  
OfficeConnect Dual Speed Switch 16 (10BASE-T/  
100BASE-TX Hub) 3C16735B  
OfficeConnect switches come with a user guide,  
power adapter, one-piece clipping system, and  
rubber feet.  
Connectors:  
8 RJ-45 10BASE-T/100BASE-TX ports  
Dimensions:  
OfficeConnect Dual Speed Switch 5 (10BASE-T/  
100BASE-TX Hub) 3C16790  
Width: 228 mm (9.1 in)  
Height: 60.6 mm (2.4 in)  
Depth: 185.4 mm (7.3 in)  
Weight: 1,000 g (2.2 lb)  
Connectors:  
5 RJ-45 10BASE-T/100BASE-TX ports  
Dimensions:  
Power: 13.2 VA  
Width: 228 mm (9.1 in)  
Height: 41.8 mm (1.6 in)  
Depth: 135.4 mm (5.3 in)  
Weight: 600 g (1.3 lb)  
Functional:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3, FCC Part  
15 Class B; ICES-003Class B; VCCI Class B; AS/NZS  
3548 Class B  
Power: 11 VA  
Functional:  
Environmental: EN 60068 (IEC 68)  
Safety:  
ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B;  
EN 55024; EN 61000-3-2, EN 61000-3-3, FCC Part  
15 Class B; ICES-003 Class B; VCCI Class B; AS/NZS  
3548 Class B  
UL 1950; EN 60950; CSA 22.2 #950, IEC 950  
Environmental: EN 60068 (IEC 68)  
Safety:  
UL 1950; EN 60950; CSA 22.2 #950, IEC950  
OfficeConnect Dual Speed Switch 5  
OfficeConnect Dual Speed Switch 8  
OfficeConnect Dual Speed Switch 16  
OfficeConnect Dual Speed Hub 8  
OfficeConnect Dual Speed Hub 16  
OfficeConnect Ethernet Hub 4  
OfficeConnect Ethernet Hub 4C  
OfficeConnect Ethernet Hub 8  
OfficeConnect Ethernet Hub 8C  
OfficeConnect Ethernet Hub 16C  
3C16790  
3C16791  
Ordering Information  
3C16735B  
3C16750B  
3C16751B  
3C16704A  
3C16703A  
3C16700A  
3C16701A  
3C16702A  
3Com Corporation, Corporate Headquarters, 5400 Bayfront Plaza, P.O. Box 58145, Santa Clara, CA 95052-8145  
bol COMS.  
Copyright © 2001 3Com Corporation. All rights reserved. 3Com and OfficeConnect are registered trademarks of 3Com  
Corporation. The 3Com logo is a trademark of 3Com Corporation. Windows and Windows NT are trademarks of  
Microsoft. NetWare is a trademark of Novell. All other company and product names may be trademarks of their respec-  
tive companies. All specifications are subject to change without notice.  
Printed in the U.S.A.  
400317-012 04/01  
 

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