RS 288-5796 Instruction Leaflet

Dual speed stackable hubs

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Instruction Leaflet

1.0 Introduction __________________________________________________2

1.1 Inspecting the package and product ______________________________________2

1.2 Features and benefits ____________________________________________________2

1.3 Product description ____________________________________________________2

1.4 Stacking the hubs ______________________________________________________4

1.5 Bridge module ________________________________________________________4

1.6 Up-link switch for cascading ______________________________________________5

1.7 Applications ____________________________________________________________5

2.0 Installation ____________________________________________________7

2.1 Locating the dual-speed hubs ____________________________________________7

2.1.1 Table top or shelf mounting ________________________________________7

2.1.2 Wall (or vertical surface) mounting__________________________________7

2.2 Connecting Ethernet Media ______________________________________________7

2.3 Powering the Hubs ______________________________________________________8

3.0 Operation ____________________________________________________8

3.1 Dual-speed functionality ________________________________________________8

3.2 Auto-negotiation and speed-sensing ______________________________________9

3.3 LED description ________________________________________________________9

3.4 Up-link switch ________________________________________________________10

4.0 Troubleshooting ______________________________________________10

4.1 Before calling for assistance ____________________________________________10

4.2 When calling for assistance______________________________________________11

5.0 Technical Specification ________________________________________11

8 Port Hub DS8-A RS stock no. 288-5796

8 Port Hub DS8-B RS stock no. 288-5803

Issued March 1998

Dual Speed

Stackable Hubs

10771

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Summary of Contents for RS 288-5796

Page 1: Table Of Contents
10771 Issued March 1998 Dual Speed Stackable Hubs Instruction Leaflet 8 Port Hub DS8-A RS stock no. 288-5796 8 Port Hub DS8-B RS stock no. 288-5803 Table of contents 1.0 Introduction __________________________________________________2 1.1 Inspecting the package and product ______________________________________2 1.2 Features and benefits ____________________________________________________2 1.3 Product description ____________________________________________________2...
Page 2: Introduction
Supports 10 or 100Mbps network connections on each port The RS dual-speed hubs combine two logical hubs, one at 10Mbps and one at 100Mbps, in a single unit supporting two traffic domains. Each port can operate at either 10 or 100Mbps independently of the other ports.
Page 3 10771 traffic. The 10Mbps users share the 10Mbps domains bandwidth and the 100Mbps users share the 100Mbps domains bandwidth. Functionally, the hubs operates as two hubs - one hub at 10Mbps and one hub at 100Mbps - in one unit. Any port can connect into either the 10Mbps or the 100Mpbs traffic domain, and can also change from one traffic domain to the other at any time without affecting the speed of other ports.
Page 4: Stacking The Hubs
10771 1.4 Stacking the hubs Up to four hubs can be stacked to operate as one 10/100 dual-speed repeater with up to 32 dual-speed ports. One DS8-B hub per stack is needed to provide a switched intercon- nection between the two separate 100Mbps and 10Mbps traffic domains in the stack. addi- tional stacked units can be model DS8-A hubs.
Page 5: Up-Link Switch For Cascading
10771 The bridge operates in the store-and-forward mode which filters out bad packets and maintains optimum performance in both domains. Packet forwarding delay is only 5µs (plus packet time), much less than traditional store-and-forward bridge products enabling the hubs to maintain high network performance. The bridge has 8K node address capac- ity., suitable for use in large networks.
Page 6 10771 Figure 4 PWR BR UPLINK A. 100 Server D. 10Mb hub B. 100 Users E. Print server C. 10 Users Router Example 3: For additional expansion, the hubs can be stacked using additional DS8-A units. The addition- al stacked ports are all auto-sensing dual-speed, and can be used at either 10Mbps or 100Mbps.
Page 7: Installation
2.1.1 Table-top or shelf mounting The RS dual-speed hub can be easily mounted on a table-top or any suitable horizontal surface, and has four rubber feet to provide stability without scratching finished surfaces. When stacked, the rubber feet also provide separation between units for the exhaust of the rear cooling fan.
Page 8: Powering The Hubs
10771 Note: Even though the connector is shielded, either unshielded or shielded cables and wiring may be used. 2. Connect the other end of the cable to the corresponding device. 3. Use the LINK LED to ensure proper connectivity by noting that the LED will be illumi- nated when the unit is powered and proper connection is established.
Page 9: Auto-Negotiation And Speed-Sensing
4. Software transparency The RS dual-speed hubs need no software set-up and are transparent to system and appli- cation software, including network management software. 3.2 Auto-negotiation and speed-sensing All eight RJ-45 ports independently support auto-negotiation for shared 10BASE-T and 100BASE-TX modes.
Page 10: Up-Link Switch
Please follow the suggestions listed below prior to contacting RS. However, if you are unsure of any procedure described in this section, or if the hub is not operating as expected, do not attempt to repair or alter the unit. Contact the RS Technical helpline for assistance.
Page 11: When Calling For Assistance
The components involved in the problem d) Any particular application that when used, appears to create the problem 2. An accurate list of the RS product model(s) involved, with serial number(s). Include the date(s) that you purchased the product.
Page 12 Components assumes no responsibility for inaccuracies or omissions, or for the use of this information, and all use of such information shall be entirely at the user’s own risk. No responsibility is assumed by RS Components for any infringements of patents or other rights of third parties which may result from its use.

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