CentreCOM™ Multiport Fanout Models AT-280 AT
Contents
1. AV Allied Telesyn International CentreCOM Multiport Fanout Models AT 280 AT 480 User Manual STATEMENTS U S Federal Communication Warning This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment gen erates uses and can radiate radio frequency energy and if not installed and used in accordance with this installation manual may cause harmful interference to radio communications Operation of this equip ment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Note Modifications or changes not expressly approved of by the manufacturer can void your right to operate this equipment Danger There are no user serviceable parts inside the CentreCOM Multiport Fanout Due to the dan ger of exposed high voltages Do not operate or apply power to the micro repeaters when the cover is removed This unit should be opened only by a trained and qualified technician Canadian Department of Communications This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the radio interference regulations of the Canadian Department of Communicatio2. 15 pin female AUI connection located at the top of the fanouts CentreCOM AT 260 AT 280 s72 DUAL POAT w IEEE 602 3 TRAMSCEIVER TORLASES MAU PREPARATION SQE Test or Heartbeat The AT 280 and AT 480 fanouts do not generate the Signal Quality Error SQE Heartbeat Test signal If the a DTE to which the AT 280 or AT 480 is connected requires the SQE Heartbeat function then place the SQE Test switch located on the external transceiver to the ON position Heartbeat and Repeaters Many times Ethernet repeaters do not want the Heartbeat function and in fact may cause excessive collisions if Heartbeat is enabled It is recommended that the Heartbeat function is on the external transceiver is disabled whenever an AT 280 and AT 480 is connected to a repeater unit INSTALLATION 1 Installation of the AT 280 and AT 480 is as simple as connecting the AUI drop cable from the Ethernet transceiver into the female connector located at the top of the AT 280 or AT 480 fanout 2 Attach additional AUI cables to the male AUI connectors and run them to the workstation or DTE Only one AUI connection is necessary to power the AT 280 and AT 480 fanouts 3 Power ON the DTE and check that the power indicator on the AT 280 and AT 480 is lit 4 Now check that packets can be transmitted and received from the DTE to a host located on the network The IEEE 802 3 specification states that the maximum length of an AUI cable must not exceed 50 meters
3. 164 ft For network reliability these limits should not be exceeded ETHERNET MEDIA AT 280 1 OR 2 WORKSTATIONS OTE AT 480 1 TO 4 WORKSTATIONS OTE INDICATORS The AT 280 and AT 480 fanouts have four LEDs They are as follows Power Indicates that power is present from one of the DTE AUI ports Transmit Indicates that packets are being transmitted to the external transceiver attached to the 15 pin connector located on the top of the fanout Receive Flashes when packets are received from the external transceiver attached to the 15 pin con nector located at the top of the fanout Collision Indicates that collisions were detected by the external transceiver AUI Pinout Pin No Signal Name Pin No Signal Name 1 LOGIC GND 9 COL 2 COL 10 TX 3 TX 11 LOGIC GND 4 LOGIC GND 12 RX 5 RX 13 POWER 12VDC 6 POWER RETURN 14 LOGIC GND 7 N C 15 N C 8 LOGIC GND Copyright 1995 Allied Telesyn International Corp CentreCOM is a trademark of Allied Telesyn International Corp All rights reserved No part of this publication may be reproduced without prior written permission from Allied Telesyn International Corp Allied Telesyn International Corp reserves the right to make changes in specifications and other informa tion contained in this document without prior written notice The information provided herein is subject to change without notice In no event shall Allied Telesyn International Corp be liable for any
4. incidental spe cial indirect or consequential damages whatsoever including but not limited to lost profits arising out of or related to this manual or the information contained herein even if Allied Telesyn International Corp has been advised of known or should have known the possibility of such damages AV Allied Telesyn International Allied Telesyn International 950 K ifer R oad Sunnyvale CA 94086 USA Tel 800 424 4284 F ax 408 736 0100 Technical Support Tel 800 428 4835 e F ax 206 481 3790 I nternational F ax 415 964 3760
5. ns Le pr sent appariel num rique n met pas de bruits radio lectriques d passant les limites appicables aux appareils num riques de la Classe A Prescrites dans le r glement sur le brouillage radio lectrique dict par le minest re des Communications Du Canada U L Environmental Caution U L listed for use in other Environmental Air Spaces in Accordance with Article 300 22 c of the U S A National Electrical Code Note Product is not Plenum rated All Countries Install in accordance with Local and National Electrical Codes PN 613 10445 00 Rev A 960305 INTRODUCTION This user manual covers the installation and troubleshooting of the CentreCOM Multiport Transceivers If you encounter any problems or questions on the follow ing procedures call the Technical Support Department at 206 821 2056 or fax 206 821 6361 Read these instructions thoroughly before stating assembly The AT 280 and AT 480 transceivers are IEEE 802 3 compliant 10BASE5 trans ceiver Media Attachment Unit MAW fanouts The AT 280 is a two port while the AT 480 is a four port transceiver fanout Except for the number of ports the two model function identically These Ethernet transceiver fanout devices are powered by a Data Terminal Equipment DTE attached to any of the male Attachment Unit Interface AUI connections Their function is similar to other multiport fanouts operating in the remote mode in that a transceiver MUST be attached to the
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