The User's Guide for the MIL-5008H Fast Ethernet TX Hub Ethernet TX Hub 1 2 3 4 MIL•5008H II 5 Link/Rx 6 7 8 Link/Rx Power open 2.34 x .535 Partition Partition Collision Digi International Sunnyvale, California Doc. Number: P/N 75415 Rev.
Install Guide Table of Contents 1. Introduction ................................................................................3 1.1 About This Guide......................................................................3 1.2 Package Contents ......................................................................3 1.3 Digi Fast Ethernet Products.....................................................4 1.4 Features.......................................................................................4 1.
Install Guide I n t ro d u c tio n This guide describes the installation of the MIL-5008H hub and its integration into a network. It covers unpacking the product, connection of power, cabling requirements and connection to the RJ-45 ports, and installing the optional feet and rack mount ears. In addition, this guide describes the meaning of the LEDs, provides trouble shooting suggestions, and a theory of operation of the MIL5008H. The MIL-5008H complies with the IEEE 802.
Install Guide D ig i Fas t Et hernet Product s In addition to the MIL-5008H Fast Ethernet hub, Digi has a full line of physical layer Fast Ethernet products by offering Fast Ethernet transceivers and converters.
Install Guide H ardw are Descript ion The MIL-5008H series hub ships with the hub, an external power supply, four rubber feet (shipped loose) that the user may attach, and rack mount ears are also included. The RJ-45 connectors and LEDs are located on the front panel of the hub. The power supply input (5VDC) is located on the rear panel. The hub is cooled by a fan. The air intake vent is located on the left with the fan outlet located on the right side of the unit.
Install Guide T h e o r y o f Operat ion The 5008H series of hubs are 100BASE-TX, half-duplex, Class II IEEE 802.3u compliant. Fast Ethernet, 100BASE-X, supports three media types, fiber optics, four pair twisted pair, and two pair twisted pair. These are known as 100BASE-FX, 100BASE-T4 and 100BASE-TX. The timing budget for 100Mbit network is 10 times smaller than a 10Mbit network. This limits the number of Class II hubs to two and Class I hubs to one for a single collision domain.
Install Guide The 4B5B encoding scheme takes four bits of data, a nibble, and maps it to a five bit format before sending it through the network. The valid data is converted back to 4 bits, or the control code is acted upon and removed from the stream prior to passing the information to the receiving end. This allows for control codes to be interspersed with data nibbles, enhancing the power of Fast Ethernet. Frames now have begin-of-frame and end-of-frame control codes attached to them.
Install Guide 5. Connect the power cord into the receptacle of the power supply. 6. Plug the power cord into the power outlet. 7. Check the Power LED of the unit. If lit, the unit is ready. 8. The Link LED is on when signal detect is sensed indicating the port is active. The partition LED for each port and the global collision LED should be off during normal operation. The MIL-5008H is ready for operation. R ack Mo u nt Ear Inst allat ion To install the optional rack mount ears, follow this procedure: 1.
Install Guide By using a Digi MIL-180T converter, you convert the TX twisted pair signals to the FX fiber media. This allows you to extend the distance beyond 100 meters for a fiber segment. On the workstation side, connect either directly to the FX port or use the MIL-100FX transceiver to adapt the FX signals to MII. 3 4 1 2 5 6 7 8 To connect the hub to another hub, switch, bridge or router, use a swap cable swapping pins 1 to 3, 2 to 6, 6 to 2, and 3 to 1.
L eg al Regulator y Approvals • • • • • FCC Class A UL 1950 CSA 22 No. 950 EN60950 CE – EN55022 Class B – EN50082-1 Canadian EMI Notice This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
