OfficeConnect®

OfficeConnect Hubs and Switches

3Com Corporation

P.O. Box 58145

5400 Bayfront Plaza

Santa Clara, CA 95052-8145 Phone: 1 800 NET 3Com or 1 408 764 5000

Specifications

Fax: 1 408 764 5001

World Wide Web:

http://www.3com.com

Asia Pacific Rim

Sydney, Australia: 61 2 9937 5000

Melbourne, Australia: 61 3 9866 8022

Beijing, China: 86 10 68492 568

Shanghai, China: 86 21 6350 1581

Hong Kong: 852 2501 1111

India: 91 11 644 3974

Indonesia: 62 21 572 2088

Osaka, Japan: 81 6 536 3303

Tokyo, Japan: 81 3 3345 7251

Korea: 82 2 3455 6300

Malaysia: 60 3 715 1333

New Zealand: 64 9 366 9138

Philippines: 632 892 4476

Singapore: 65 538 9368

Taiwan: 886 2 2 377 5850

Thailand: 662 231 8151 5

3Com Benelux B.V.

Belgium: 32 2 725 0202

Netherlands: 31 346 58 62 11

3Com Canada

Calgary: 1 403 265 3266

Edmonton: 1 403 423 3266

Montreal: 1 514 683 3266

Ottawa: 1 613 566 7055

Toronto: 1 416 498 3266

Vancouver: 1 604 434 3266

3Com France

33 1 69 86 68 00

3Com GmbH

Austria: 43 1 580 17 0

Czech/Slovak Republics:

420 2 21845 800

Berlin, Germany: 49 30 3498790

Munich, Germany (Central European

HQ): 49 89 627320

Hungary: 36 1 250 83 41

Poland: 48 22 6451351

Switzerland: 41 844 833 933

3Com Ireland

353 1 820 7077

3Com Latin America

U.S. Headquarters: 1 408 326 2093

Miami, Florida: 1 305 261 3266

Argentina: 54 1 312 3266

Brazil: 55 11 246 5001

Chile (also serving Bolivia and Peru): 56 2 633 9242

Colombia: 57 1 629 4847

Mexico: 52 5 520 7841/7847

Peru: 51 1 221 5399

Venezuela: 58 2 953 8122

3Com Mediterraneo

Milan, Italy: 39 2 253011

Rome, Italy: 39 6 5279941

3Com Iberia

Portugal: 351 1 3404505

Spain: 34 1 509 69 00

3Com Middle East

971 4 319533

3Com Nordic AB

Denmark: 45 48 10 50 00

Finland: 358 9 435 420 67

Norway: 47 22 58 47 00

Sweden: 46 8 632 56 00

OfficeConnect

Switches

All OfficeConnect switches come with a user guide, power adapter, stacking clips, and rubber feet.

OfficeConnect Switch 140 (Unmanaged 10+100BASE-TX Switch)

Connectors: Four 10BASE-T RJ-45 ports; One 100BASE-TX RJ-45 port (MDI/MDIX selectable)

Dimensions: Width: 220 mm

(8.7 in); Height 54.6 mm (2.1 in); Depth: 185.4 mm (7.3 in); Weight: 960 g (2.1 lb)

Power: 18 VA

Standards

Functional: ISO 8802/3;

IEEE 802.3; EMC; EN 55022

Class B*; EN 50082-1; FCC Part

15 Class B; CSA C108.8 Class B;

VCCI Class 2

Safety: UL 1950; EN 60950;

EMC; EN 55022 Class B*;

EN 50082-1; FCC Part 15 Class B

Verified; C108.8 Class B; VCCI

Class 2;

Screened (shielded) cables must be used to ensure compliance with these standards.

Environmental: EN 60068 (IEC 68)

Safety: UL 1950; EN 60950; CSA 22.2 #950

OfficeConnect Switch 140M (Managed 10+100BASE-TX Switch)

Connectors: Four 10BASE-T RJ-45 ports; One 100BASE-TX RJ-45 port (MDI/MDIX selectable); One DB-9 serial connection for management

Dimensions: Width: 220 mm

(8.7 in); Height: 54.6 mm (2.1 in);

Depth: 185.4 mm (7.3 in);

Weight: 960 g (2.1 lb)

Power: 18 VA

Standards

Functional: ISO 8802/3;

IEEE 802.3; EMC; EN 55022

Class B; EN 50082-1; FCC Part 15

Class B; CSA C108.8 Class B;

VCCI Class 2; AS/NZS 3548

Class B

Environmental: EN 60068 (IEC 68)

Safety: UL 1950; EN 60950; CSA 22.2 #950

OfficeConnect Switch 280 (Unmanaged 10+100BASE-TX Switch)

Connectors: Eight 10BASE-T RJ-45 ports; Two 10/100BASE-TX RJ-45 ports (MDI/MDIX selectable)

Dimensions: Width: 220 mm

(8.7 in); Height: 54.6 mm (2.1 in);

Depth: 185.4 mm (7.3 in);

Weight: 960 g (2.1 lb)

Power: 30 VA

Standards

Functional: ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B*; EN 50082-1; FCC Part 15 Class B; ICES-003 Class B; CSA C108.8 Class B; VCCI Class 2; AS/NZS 3548 Class B;

Screened (shielded) cables must be used to ensure compliance with these standards.

Environmental: EN 60068 (IEC 68)

Safety: UL 1950; EN 60950; CSA 22.2 #950; IEC 950

OfficeConnect Switch 400 (Unmanaged 10/100BASE-TX auto-sensing ports)

Connectors: Four 10/100BASE- TX RJ-45 ports (MDI/MDIX selectable)

Dimensions: Width: 220 mm

(8.7 in); Height: 54.6 mm (2.1 in);

Depth: 185.4 mm (7.3 in);

Weight: 960 g (2.1 lb)

Power: 20 VA

Standards

Functional: ISO 8802/3; IEEE 802.3; EMC; EN 55022 Class B*; EN 50082-1; FCC Part 15 Class B; ICES-003 Class B; CSA C108.8 Class B; VCCI Class B; AS/NZS 3548 Class B

Screened (shielded) cables must be used to ensure compliance with these standards.

Environmental: EN 60068 (IEC 68)

Safety: UL 1950; EN 60950; CSA 22.2 #950; IEC 950

Warranty Summary

All OfficeConnect hubs and switches are covered by a lifetime warranty; the power adapter is also included in this warranty. To qualify for the warranty, you must submit a registration card. Advance hardware exchange is available during the first year; thereafter, return the hub to 3Com for repair.

The lifetime warranty is not offered where restricted or prohibited by law.

*Screened (shielded) cables must be used to ensure compliance with EMC Class B standards.

3Com Russia

7 095 258 09 40

3Com Southern Africa

27 11 807 4397

3Com UK Ltd.

Edinburgh: 44 131 240 2900

Manchester: 44 161 873 7717

Marlow: 44 1628 897000

To learn more about 3Com products and services, visit our World Wide Web site at http://www.3com.com.

Copyright © 1998 3Com Corporation or its subsidiaries. All rights reserved. 3Com, EtherLink, OfficeConnect, SmartAgent, and Transcend are registered trademarks of 3Com Corporation or its subsidiaries. PACE is a trademark of 3Com Corporation or its subsidiaries. Other products and brand names may be trademarks or registered trademarks of their respective owners. All specifications are subject to change without notice.

Printed in U.S.A. on recycled paper

400317-005 5/98

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3Com Hubs and Switches OfficeConnect Switches, Warranty Summary, OfficeConnect Switch 140 Unmanaged 10+100BASE-TX Switch

Hubs and Switches specifications

3Com Hubs and Switches have been pivotal in networking technology, especially during the 1990s and early 2000s, when businesses were rapidly adopting Local Area Networks (LANs). Known for their reliability and user-friendly designs, 3Com's networking products laid the groundwork for the modern infrastructure we rely on today.

One of the main features of 3Com hubs was their ability to connect multiple devices on a single network. Hubs operate at the physical layer of the OSI model, functioning as simple connection points. They receive data packets from one device and broadcast them to all other connected devices. This made 3Com hubs an economical solution for small networks and home offices, enabling seamless communication but limiting bandwidth efficiency due to collisions in a shared network environment.

In contrast, 3Com switches brought significant advancements to networking technology. Operating at the data link layer, switches intelligently analyze incoming traffic and direct data packets only to the intended recipient. This feature reduces network collisions and enhances overall performance, particularly in larger networks. 3Com switches were designed for scalability, accommodating growing business needs while improving traffic management and bandwidth efficiency.

Another key technology associated with 3Com was their implementation of Virtual LANs (VLANs). VLANs allow network administrators to segment networks into smaller, isolated groups, even when devices are geographically dispersed. This enhances security and performance by controlling broadcast traffic and ensuring sensitive data remains separate.

3Com also prioritized ease of management with features like Simple Network Management Protocol (SNMP) for monitoring devices and traffic. Additionally, their products supported Power over Ethernet (PoE), simplifying installations by delivering power through Ethernet cables to devices like IP phones and security cameras, thus eliminating the need for separate power sources.

With robust build quality, 3Com hubs and switches ensured reliability in demanding environments. They offered a range of products catering to various needs, from small businesses to large enterprises. Though newer technologies have emerged since, the legacy of 3Com hubs and switches remains influential in the development of networking infrastructure, laying groundwork for today’s more advanced systems.