TECHNICAL INFORMATION

Related Standards

The SuperStack 3 Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T has been designed to the following standards:

Functional

ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u

 

(Fast Ethernet), IEEE 802.3ab (Gigabit Ether-

 

net) IEEE 802.3x (Flow Control) IEEE 802.1D

 

1998 (Bridging)

Safety

UL 1950, EN 60950, CSA 22.2 #950, IEC

 

60950

EMC Emissions

EN 55022 Class A, FCC Part 15 Subpart B

 

Class A, ICES-003 Class A, VCCI Class A,

 

AS/NZS 3548 Class A, CNS 13438 Class A

Immunity

EN 55024

Environmental

Operating Temperature 0–50°C(32–122 °F)

Humidity

10–95% (non-condensing)

Standard

EN 60068 (IEC 68)—various parts

Physical

Width

440mm (17.3in.)

Depth

235mm (9.3in.)

Height

44mm (1.7in.) or 1U

Weight

2.6kg (5.8lb)

Mounting

Free standing, or 19in. rack mounted using

 

the mounting kit supplied

Electrical

Power Inlet

IEC 320

AC Line Frequency

50/60 Hz

Input Voltage

100–240 VAC

Current Rating

1 Amps (maximum)

Maximum Power

42 VA

Consumption

 

Maximum Power

142 BTU/hr

Dissipation

 

LIMITED WARRANTY

This warranty applies to customers located in the United States, Australia, Canada (except Quebec), Ireland, New Zealand, U.K., and other English language countries, and countries for which a translation into the local language is not provided.

SuperStack 3 Baseline 10/100 Switch 24-Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T (3C16467)

HARDWARE: 3Com warrants to the end user ("Customer") that this hardware product will be free from defects in workmanship and materials, under normal use and service, for the following length of time from the date of purchase from 3Com or its authorized reseller:

Lifetime, for as long as the original Customer owns the product (not transferable to a subsequent end user)

3Com's sole obligation under this express warranty shall be, at 3Com's option and expense, to repair the defective product or part, deliver to Customer an equivalent product or part to replace the defective item, or if neither of the two foregoing options is reasonably available, 3Com may, in its sole discretion, refund to Customer the purchase price paid for the defective product. All products that are replaced will become the property of 3Com. Replacement products or parts may be new or reconditioned. 3Com warrants any replaced or repaired product or part for ninety

(90)days from shipment, or the remainder of the initial warranty period, whichever is longer.

SOFTWARE: 3Com warrants to Customer that each software program licensed from it, except as noted below, will perform in substantial conformance to its program specifications, for a period of ninety (90) days from the date of purchase from 3Com or its authorized reseller. 3Com warrants the media containing software against failure during the warranty period. No updates are provided, unless specifically included in the Included Services section. 3Com's sole obligation under this express warranty shall be, at 3Com's option and expense, to refund the purchase price paid by Customer for any defective software product, or to replace any defective media with software which substantially conforms to applicable 3Com published specifications. Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials. 3Com makes no warranty or representation that its software products will meet Customer's requirements or work in combination with any hardware or applications software products provided by third parties, that the operation of the software products will be uninterrupted or error free, or that all defects in the software products will be corrected. For any third party products listed in the 3Com software product documentation or specifications as being compatible, 3Com will make reasonable efforts to provide compatibility, except where the non-compatibility is caused by a "bug" or defect in the third party's product or from use of the software product not in accordance with 3Com's published specifications or user manual.

THIS 3COM PRODUCT MAY INCLUDE OR BE BUNDLED WITH (1) THIRD PARTY SOFTWARE, OR (2) 3COM SOFTWARE THAT IS LICENSED "AS IS", THE USE OF WHICH IS GOVERNED BY A SEPARATE END USER LICENSE AGREEMENT. THIS 3COM WARRANTY DOES NOT APPLY TO SUCH THIRD PARTY SOFTWARE OR 3COM SOFTWARE LICENSED "AS IS". FOR THE APPLICABLE WARRANTY, PLEASE REFER TO THE END USER LICENSE AGREEMENT GOVERNING THE USE OF SUCH SOFTWARE OR THE ACCOMPANYING DOCUMENTATION RELATING TO SUCH SOFTWARE.

YEAR 2000 WARRANTY: In addition to the Hardware Warranty and Software Warranty stated above, 3Com warrants that each product sold or licensed to Customer on and after January 1, 1998 that is date sensitive will continue performing properly with regard to such date data on and after January 1, 2000, provided that all other products used by Customer in connection or combination with the 3Com product, including hardware, software, and firmware, accurately exchange date data with the 3Com product, with the exception of those products identified at 3Com's Web site, http://www.3com.com/products/yr2000.html, as not

meeting this standard. If it appears that any product that is stated to meet this standard does not perform properly with regard to such date data on and after January 1, 2000, and Customer notifies 3Com within ninety (90) days after purchase of the product from 3Com or its authorized reseller, 3Com shall, at its option and expense, provide a software update which would effect the proper performance of such product, repair such product, deliver to Customer an equivalent product to replace such product, or if none of the foregoing is feasible, refund to Customer the purchase price paid for such product.

Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety (90) days after purchase.

OBTAINING WARRANTY SERVICE: Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable warranty period to obtain warranty service authorization. Dated proof of purchase from 3Com or its authorized reseller may be required. Products returned to 3Com's Corporate Service Center must be pre-authorized by 3Com with a User Service Order (USO) number (or a Return Material Authorization (RMA) number or a Service Repair Order (SRO) number, whichever was issued) marked on the outside of the package, and sent prepaid and packaged appropriately for safe shipment, and it is recommended that they be insured or sent by a method that provides for tracking of the package. Responsibility for loss or damage does not transfer to 3Com until the returned item is received by 3Com. The repaired or replaced item will be shipped to Customer, at 3Com's expense, not later than thirty (30) days after 3Com receives the defective product, and 3Com will retain risk of loss or damage until the item is delivered to Customer.

3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on, or integrated with any products returned to 3Com for repair, whether under warranty or not.

Dead- or Defective-on-Arrival. In the event a product completely fails to function or exhibits a defect in materials or workmanship within the first forty-eight (48) hours of installation but no later than thirty (30) days after the date of purchase, and this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and a replacement shall be provided prior to 3Com receiving the defective product, but only if Customer provides a purchase order number, credit card number, or other method of payment acceptable to 3Com, to be used if 3Com needs to charge Customer for the replacement, as explained below. The replacement product will normally be shipped not later than three (3) business days after 3Com's verification of the DOA product, but may be delayed due to export or import procedures. The shipment of a replacement product prior to 3Com receiving the defective product is subject to local legal requirements and may not be available in all locations. When such a replacement is provided and Customer fails to return the original product to 3Com within fifteen (15) days after shipment of the replacement, 3Com will charge Customer for the replacement product, at list price.

Shipment of a Replacement Prior to 3Com Receiving the Defective Product is

provided for five (5) years, after which time it may be available for a specified fee, but in either case only if Customer provides a purchase order number, credit card number, or other method of payment acceptable to 3Com, to be used if 3Com needs to charge Customer for the replacement, as explained below. 3Com will make commercially reasonable efforts to ship the replacement product not later than five

(5)business days after receiving the request for a replacement, but may be delayed due to product availability or export or import procedures. The shipment of a replacement product prior to 3Com receiving the defective product is subject to local legal requirements and may not be available in all locations. When such a replacement is provided and Customer fails to return the original product to 3Com within fifteen (15) days after shipment of the replacement, 3Com will charge Customer for the replacement, at list price. This replacement prior to 3Com receiving

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3Com 10BASE-T manual Technical Information, Limited Warranty, Related Standards

10BASE-T specifications

3Com 10BASE-T is a networking technology that plays a foundational role in local area networks (LANs). Introduced in the early 1990s, it quickly became one of the most widely adopted Ethernet standards, enabling reliable data transmission over twisted-pair cabling. Designed to operate at speeds of 10 megabits per second, 10BASE-T facilitated the transition from older coaxial cable systems to more flexible cabling options, paving the way for more robust and scalable network infrastructures.

One of the defining features of 3Com 10BASE-T is its use of unshielded twisted pair (UTP) cabling, specifically Category 3 cabling at its inception. This choice of cabling allowed for easier installation and lower costs compared to coaxial cables. Furthermore, the standardized cabling allows for distances of up to 100 meters between network devices, making it suitable for various office layouts. The connectors used with 10BASE-T networks are RJ-45 connectors, which have become a staple in networking.

Another characteristic of 10BASE-T is its method of signaling. It employs Manchester encoding, which speeds up error detection and improves resilience against noise. This coding scheme allows for the transmission of 0s and 1s over a single twisted pair of wires, adding an extra layer of efficiency to the network's operation. The design also includes a built-in collision detection mechanism, which helps manage data traffic effectively, thereby maintaining network integrity.

A defining technology of 3Com's implementation of 10BASE-T is its ability to support a star topology. Unlike previous bus topology systems that relied heavily on coaxial cables, the star topology allows for individual connections to a central hub or switch. This setup not only enhances fault tolerance—since a failure in one cable does not impact other network segments—but also simplifies network management and troubleshooting.

Additionally, 3Com's 10BASE-T technology supports auto-negotiation, allowing connected devices to automatically determine the best speed and duplex setting for communication. This adaptability makes it easier to integrate newer devices into existing networks and ensures smoother transitions as technology evolves.

In summary, 3Com 10BASE-T represents a significant advancement in networking technology, characterized by its use of twisted-pair cabling, efficient Manchester encoding, star topology, and auto-negotiation capabilities. Its contributions set the stage for the development of faster and more advanced Ethernet standards, cementing its place in the history of computer networking.