CentreCOM ® AT-3012SL AT-3016SL AT-3024SL Multiport Repeaters Installation Guide PN 613-10627-00 Rev A
Copyright 1997 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 reserves the right to make changes in specifications and other information contained in this document without prior written notice. The information provided herein is subject to change without notice.
Electrical Safety and Installation Requirements STANDARDS: This product meets the following standards U.S. Federal Communications Commission RADIATED ENERGY Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
NORMEN: Dieses Produkt erfüllt die Anforderungen der nachfolgenden Normen. Hochfrequenzstörung EN55022 Klasse A WARNUNG: Bei Verwendung zu Hause kann dieses Produkt Funkstörungen hervorrufen. In diesem Fall müßte der Anwender angemessene Gegenmaßnahmen ergreifen. Störsicherheit EN50082-1 Elektrische Sicherheit EN60950, UL1950, CSA 950 SICHERHEIT ACHTUNG: GEFÄHRLICHE SPANNUNG Das Gehäuse nicht öffnen. Das Gerät enthält keine vom Benutzer wartbaren Teile.
EISEN: Dit product voldoet aan de volgende eisen. RFI Emissie EN55022 Klasse A WAARSCHUWING: Binnenshuis kan dit product radiostoring veroorzaken, in welk geval de gebruiker verplicht kan worden om gepaste maatregelen te nemen. Immuniteit EN50082-1 Electrische Veiligheid EN60950, UL1950, CSA 950 VEILIGHEID WAARSCHUWINGEN MET BETREKKING TOT ELEKTRICITEIT WAARSCHUWING: GEVAAR VOOR ELEKTRISCHE SCHOKKEN Gelieve het deksel niet te verwijderen, teneinde ELEKTRISCHE schokken te voorkomen.
STANDARDIT: Tämä tuote on seuraavien standardien mukainen. Radioaaltojen häirintä EN55022 Luokka A VAROITUS: Kotiolosuhteissa tämä laite voi aiheuttaa radioaaltojen häiröitä, missä tapauksessa laitteen käyttäjän on mahdollisesti ryhdyttävä tarpeellisiin toimenpiteisiin. Kestävyys EN50082-1 Sähköturvallisuus EN60950, UL1950, CSA 950 TURVALLISUUS SÄHKÖÖN LIITTYVIÄ HUOMAUTUKSIA VAROITUS: SÄHKÖISKUVAARA Estääksesi SÄHKÖISKUN älä poista kantta. Sisällä ei ole käyttäjän huollettavissa olevia osia.
SIKKERHETSNORMER: Dette produktet tilfredsstiller følgende sikkerhetsnormer. RFI stråling EN55022 Klasse A ADVARSEL: Hvis dette produktet benyttes til privat bruk, kan produktet forårsake radioforstyrrelse. Hvis dette skjer, må brukeren ta de nødvendige forholdsregler. Immunitet EN50082-1 Elektrisk sikkerhet EN60950, UL1950, CSA 950 SIKKERHET ELEKTRISKE MEDDELELSE ADVARSEL: FARE FOR ELEKTRISK SJOKK For å unngå ELEKTRISK sjokk, må dekslet ikke tas av. Det finnes ingen deler som du kan bruke på innsiden.
ESTÁNDARES: Este producto cumple con los siguientes estándares. Emisión RFI EN55022 Clase A ADVERTENCIA: en un entorno doméstico, este producto puede causar radiointerferencias, en cuyo caso, puede requerirse del usuario que tome las medidas que sean convenientes al respecto. Inmunidad EN50082-1 Seguridad eléctrica EN60950, UL1950, CSA 950 ENERGIA RADIADA Este producto comercial ha sido probado y cumple con las normas requeridas en los EE. UU. para un dispositivo de Clase A.
ELEKTRISKT—ANMÄRKNING BETRÄFFANDE KABELN Använd en kabel med maximum längd 4,5 meter och minimum 6 amp nominal, 250V, av HAR kabelfabrikat med ett specialutformat IEC 320-kontaktdon i ena änden och i den andra en plugg som godkänts i landet där produkten används. VARNING: Luftventilerna får ej blockeras och måste ha fri tillgång till omgivande rumsluft för avsvalning. DRIFTSTEMPERATUR Denna produkt är konstruerad för rumstemperatur ej överstigande 50 grader Celsius.
Table of Contents Electrical Safety and Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Chapter 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Major Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A Data Cabling Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 10Base-T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 UTP Hub-to-MAU Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Description CentreCOM AT-3012SL, AT-3016SL, and AT-3024 SL Multiport Repeaters provide low-cost connection for up to 24 IEEE 802.3 10Base-T network segments. The series includes three different models, featuring 12, 16 and 24 shielded RJ-45 port connections for 10Base-T networks. In addition to the twisted pair interfaces, each unit includes a choice of two network ports for interconnection to a network backbone: ❑ An IEEE 802.
Description Major Features The major features of the AT-3012SL, AT-3016SL, and AT-3024SL Multiport Repeaters are the following: ❑ Packet Regeneration — This feature regenerates the packet preamble, retimes the data packets, and extends collision fragments. ❑ Link Integrity — The IEEE 802.3 defined link integrity test function continually monitors the twisted pair cable to ensure link continuity of the receive pair between the user node and the repeater.
AT-30xxSL Multiport Repeaters ❑ Status and diagnostic LEDs ❑ MDI/MDI-X switch that enables cascading of hubs without a special crossover cable (Port 1) ❑ Standalone or rack mountable installation ❑ Internal termination selection switch on BNC port Front Panel All connectors are located on the front panel.
Description 1 X3 X5 X7 X9 X11 X13 X15 X17 X19 X21 X23 10BASE-T PORT ACTIVITY NETWORK UTILIZATION(%) 2 3 5 7 9 11 13 15 17 19 21 23 2 4 6 8 10 12 AUI 14 16 18 20 22 24 X2 X4 X6 X8 X10 X12 X14 X16 X18 X20 X22 TERMINATOR LINK POWER ACTIVITY COLLISION RECEIVING X24 RECEIVING ON COLLISION 1 2 3 6 1 2 3 6 STATUS 8 16 32 64 84+% RECEIVING 1 2 3 6 IEEE 802.
AT-30xxSL Multiport Repeaters 4 10BASE-T NETWORK PORTS 5 6 7 8 9 10 11 10BASE-T PORT ACTIVITY NETWORK UTILIZATION(%) 12 1 2 3 6 1 2 63 1 2 3 6 1 2 3 6 X X X X X X X X X X X 2 2 4 8 16 32 64 84+% 3 4 5 6 7 8 9 RECEIVING 10 AUI BNC 1 RECEIVING OFF 1 11 12 TERMINATOR LINK PARTITION STATUS POWER RECEIVING ON ACTIVITY COLLISION 3 COLLISION 2 IEEE 802.
Description MDI/MDI-X Switch The Medium Dependent Interface (MDI/MDI-X) is an internal signal crossover that allows you to use a 10BaseT port to link one hub to another, or to connect a hub to hub using the network port. This type of connection requires the signal to “crossover” so that the TX pin at one end connects to the RX pin at the other end. The 10Base-T RJ-45 ports generally are used for network connections between the hub and Network Interface Card (NIC).
AT-30xxSL Multiport Repeaters If you connect a straight-through cable or any cable between two hubs or any two nodes, and the network LEDs do not indicate a link condition, change the MDI/MDI-X switch to the other setting. The repeater will not be damaged if the MDI switch is in the wrong position.
Chapter 2 Installation Site Requirements Note Before installing the repeaters, read the electrical safety and installation requirements starting on page iii. Ventilation Power The multiport 10Base-T repeaters have vents on the sides for air circulation. Do not restrict air flow through these openings. Obstructing the passages can cause overheating and possible component damage.
Installation Port Configurations Station Ports Each AT-301SL2, 3016SL, 3024SL repeater includes a bank of 10Base-T station port receptacles equipped with shielded RJ-45 connectors. The model number indicates the number of station ports, as shown in Table 2. The layout and numbering of the ports varies depending on the model type; refer to Chapter 3, 4 or 5 as appropriate.
AT-30xxSL Multiport Repeaters Using an external transceiver 1. Connect an AT-210T transceiver or AT-210TS transceiver to the repeater’s 15-pin AUI port. 2. Make sure that the transceiver’s Signal Quality Error (SQE)/Heartbeat test function is disabled. When the repeater is powered on, the transceiver should also be receiving power. 3. Attach one end of a straight-through UTP cable to the transceiver’s 10Base-T receptacle, and the other end to Port 1, as shown in Figure 8. 4.
Installation Verifying Installation 1. Establish a connection from the device connected to Port 1 to the device connected to Port 2. 2. Once the connection between the devices that attach to 10Base-T Port 1 and Port 2 has been successfully established, remove the RJ-45 connector from Port 2 and connect it to the unit’s remaining 10Base-T ports to verify functionality. 3. If all ports test successfully, install the remaining 10Base-T RJ-45 connections and make sure that the LINK LED for each port is lit.
Chapter 3 Troubleshooting 10Base-T Cabling If the Power LED is not lit ❑ Check your power connections. If the LINK LED is not lit 1. Check that the device at the opposite end of the UTP link is powered on, and make sure the cable is properly connected. 2. Check that the proper cable pinout is used. If another manufacturer’s 10Base-T device is used at the opposite end of the UTP link, make sure that it is true 10Base-T.
Chapter 4 Configurations The illustrations in this chapter provide some examples of possible network configurations using CentreCOM AT-3012SL, 3016SL, 3024SL Multiport Repeaters. These examples are not meant to be exhaustive and may or may not fit your network’s requirements. For consistency, the examples show AT-3012SL units, but any combination of the three models may be used interchangeably.
Configurations Cascade Cascading of the AT-3012SL, 3016SL, 3024SL Multiport Repeater also is possible following the IEEE 802.3 four repeater rule, as shown in Figure 10. Figure 10 shows the maximum extent to which you can cascade these repeaters.
AT-30xxSL Multiport Repeaters Another way of achieving the same result is to use a dual-port AUI transceiver and a two-level cascade, as shown in Figure 11. You also can connect each repeater separately to the backbone, using a four-port AUI transceiver in place of the dual-port one.
Configurations BNC Bus Bussing of the AT-3012SL, 3016SL, 3024SL multiport repeater is another possibility. You can accommodate more nodes on your network if you connect the repeaters through the BNC network port. Note that the worst case, node to node, is through only two repeaters; one provides the UTP station linkage to thinnet, and the second repeater connects thinnet through the BNC bus to the AUI cable. On 10Base2 thin Ethernet, a maximum of 30 hubs can be connected, as shown in Figure 12.
Appendix A Data Cabling Connections The following sections detail cabling connections and port specifications for IEEE 802.3 media. For comprehensive treatment of these topics, refer to the original IEEE specification. 10Base-T UTP (RJ-45) links support maximum transmission length of 100 meters (328 ft.) at 10 Megabit per second data rates. A serious problem exists concerning identification of modular cable. There are various grades of voice-quality and data-quality cables available.
Data Cabling Connections UTP Hub-to-MAU Wiring All three repeaters have 10Base-T UTP ports with industry-standard RJ-45 connectors. The standard network connection is from a Data Communications Equipment (DCE) device, such as the repeater, to a Data Terminal Equipment (DTE) device, such as a workstation Network Interface Controller (NIC). This configuration uses a straight-through cable, as shown in Figure 13.
AT-30xxSL Multiport Repeaters UTP MAU-to-MAU, Hub-to-Hub Wiring 10Base-T MAU-to-MAU or hub-to-hub wiring generally requires a crossover cable located somewhere along the UTP cable run. This may commonly occur at the punch-down block or between the RJ-45 wall connector and the workstation. See Figure 15.
Data Cabling Connections In both the crossover and straight-through instances, the wire is twisted pair. Figure 16 demonstrates usable and unusable cable configurations for the straight-through wire pairing in the UTP environment. A 1 Pair twisted as per Level 3, 4 or 5 cable.
AT-30xxSL Multiport Repeaters 10Base5 (Thick) Ethernet When configuring 10Base5 coax segments, IEEE 802.3 specifications allow 100 MAU attachments or less, spaced at multiples of 2.5 meters (8.2 ft.) measured accurately from the cable end (50 Ω terminator included). The 10Base5 cable segment cannot exceed 500 meters (1,640 ft.). Worst case “endto-end” propagation delay of a 10Base5 coax segment is 2165 ns. Propagation delay of 10Base5 Ethernet coax is calculated at 4.33 ns/meter.
Appendix B Glossary 10Base2—Also called thin Ethernet, thinnet or CheaperNet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coaxial segment length is 185 meters (607 ft.). 10Base5—Also called thick Ethernet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coaxial segment is 500 meters (1,640 ft.). The cable is commonly referred to as yellow cable. Thick Ethernet cable is typically used as a trunk or backbone path of the network. 10Base-T—IEEE 802.3 UTP Ethernet.
Glossary COAXIAL CABLE SEGMENT—A length of coaxial cable sections and coaxial connectors, terminated at each end in its characteristic impedance. COLLISION—An unwanted condition that results from concurrent transmissions on the physical medium. COMPATIBILITY INTERFACE—The MDI coaxial cable interface and the AUI branch cable interface, the two points at which hardware compatibility is defined to allow connection of independently designed and manufactured components to the baseband transmission system.
AT-30xxSL Multiport Repeaters LINK SEGMENT—The link segment of coaxial cable is a segment that has no MAU devices, but links together two LAN devices such as repeaters. LINK TEST—In 10Base-T Ethernet there is a link test function that validates the UTP link. This consists of a pulse transmitted from point A on one pair that is validated at point B. Point B also transmits a pulse on the second pair to be validated by point A. These pulses occur during media idle states (in between packets).
Glossary SIGNAL QUALITY ERROR (SQE)—Also referred to as Collision or Collision Presence. This occurs when two devices attempt to transmit at the same time, which is an illegal condition. All ATI transceivers test for SQE. SQE TEST—Commonly referred to as Heartbeat, is a special 802.3 signal sent by the MAU to the DTE to test the collision detection function. Some DTE want SQE and others do not. Repeaters do not want the SQE Test.
Appendix C Technical Support Fax Order Name ___________________________________________________________________ Company ________________________________________________________________ Address _________________________________________________________________ City ____________________State/Province____________ Zip/PostalCode __________ Country _______________________ Phone______________________ Fax _________ Incident Summary Model number of Allied Telesyn product I am using _____________________________ F
Appendix D CentreCOM AT-30xxSL Installation Guide Feedback Please tell us what additional information you would like to see discussed in the guide. If there are topics you would like information on that were not covered in the guide, please photocopy this page, answer the questions and fax or mail this form back to Allied Telesyn. The mailing address and fax number are at the bottom of the page. Your comments are valuable when we plan future revisions of the guide.
Appendix E Where To Find Us For Technical Support or Service Location Phone Fax Americas United States, Canada, Mexico, Central America, South America 1 (800) 428-4835 1 (206) 481-3790 Asia Singapore, Taiwan, Thailand, Malaysia, Indonesia, Korea, Philippines, China, India (+65) 3815-613 (+65) 3833-830 Australia Australia, New Zealand (612) 416-0619 (612) 416-9764 France France, Belgium, Luxembourg, The Netherlands, Middle East, Africa (+33) 1-60-92-15-32 (+33) 1-69-28-37-49 Germany Germany,
Appendix F Index Numerics 10Base5 (thick) AUI drop cables 23 10Base-T MDI/MDI-X switch 21 UTP hub-to-MAU wiring 20 UTP MAU-to-MAU, hub-to-hub wiring 20 A applying power 10 attachment unit interface 2 AUI 23 AUI drop specification 23 AUI port 2 B bussing configuration 18 C cabling 10Base2 23, 25 10Base2 (thin) 23 10Base5 23 10Base5 (thick) 23 10Base-T 19, 20 crossover 6, 21 straight-through 20, 21 usable and unusable 22 UTP 19, 20, 21, 22 cascade configuration 16 collision led 13 compliance IEEE 21 IEEE 80
Index Q quick installation 7 R retiming 2 S segmentation 2 site requirements 9 station ports 10 straight-through cable 7 T transceiver 1, 11 U UTP cable 13 V ventilation 9 W wiring 6, 19, 20, 21, 22, 23, 25 AUI drop, specification 23 36
