Allied Telesis CentreCOM AT-200 Series, User Manual, Page: 8 / 19

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Page: 8 / 19

Allied Telesis CentreCOM AT-200 Series User Manual Download Page 8

1

Overview

CentreCOM™ AT-200 Series Single Port Transceivers are highly reliable compact
Media Access Units (MAUs) for users of Ethernet Local Area Networks (LANs).
They provide the electronic and physical interface between the IEEE 802.3 coaxial
cable and a Data Terminal Equipment (DTE) station.

The AT-200 transceiver is available in a variety of configurations, all of which meet
the transceiver compliance requirements of IEEE 802.3 and are compatible with
Ethernet Version 1.0 and 2.0. The use of industry-standard connectors ensures
plug compatibility with all existing cable connectors used in Attachment Unit
Interface (AUI), thicknet (10BASE5) or thinnet (10BASE2) installations.

Table 1 shows the AT-200 series transceiver models available.

Table 1:

AT-200 Series Single

Port Transceivers

Installation

Installation of an AT-200 series transceiver involves checking heartbeat
configuration, installing the tap body (if it is shipped separated or has been
removed) and connecting the cables properly. The AT-204, AT-207 and AT-208 are
shipped with the coaxial tap body installed. With the AT-206, you install the coaxial
active tap body when you tap the 10BASE5 cable. The AT-205 comes with no tap
body.

Heartbeat configuration

All transceivers are shipped with the Heartbeat switch in the “0”

(disabled) position.

With few exceptions, the Signal Quality Error (SQE)/Heartbeat (i.e., Collision
Presence Test) should be disabled; i.e., the Heartbeat switch should be left in the
“0” (disabled) position. Check the device’s documentation to determine whether to
enable SQE/Heartbeat. In most cases, when the AUI port is connected to a
repeater or another node, the switch must be set to “0” to eliminate the possibility
of excessive collisions. The switch should be set to “1” (enabled) with some older
Data Communication Equipment (DCE) repeaters and Network Interface
Controller (NIC) cards that take advantage of the heartbeat signal.

Model

Cable

Connector

AT-204

10BASE2

Bayonet Nut Couple (BNC)

AT-205

N/A

No Backbone Connector

AT-206

10BASE5

Coaxial Active (Stinger) Type Tap

AT-207

10BASE2

BNC-T

AT-208

10BASE5

Coaxial N-Series

Note

613-10423-00Book Page 1 Monday, March 4, 1996 2:29 PM

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Summary of Contents for CentreCOM AT-200 Series

Page 1: ...PN 613 10423 00 Rev A 951117 CentreCOM AT 200 Series Single Port Transceiver User Manual 613 10423 00Book Page 1 Monday March 4 1996 2 29 PM ...

Page 2: ...hese products have been safety tested by UL to Standard UL 478 CSA to CSA 220 and by TUV to EN60950 The AT 200 series models have been safety tested as Non Patient Equipment by Underwriters Laboratories Inc to UL544 the Standard for Medical and Dental Equipment LIGHTNING DANGER DANGER DO NOT WORK on equipment or CABLES during periods of LIGHTNING ACTIVITY INSTALLATION Operating temperature This pr...

Page 3: ...JR FARE UNDLAD at arbejde på udstyr eller KABLER i perioder med LYNAKTIVITET INSTALLATION Betjeningstemperatur Dette apparat er konstrueret til en omgivende temperatur på maksimum 50grader C Alle Lande Installation af produktet skal ske i overensstemmelse med lokal og national lovgivning for elektriske installationer STRALINGSENERGIE Dit handelsprodukt werd getest en voldoet aan de Amerikaanse ver...

Page 4: ...tannut nämä tuotteet Standard 478 mukaisesti CSA standardin CSA 220 mukaisesti ja TUV standardin EN60950 mukaisesti Underwriters Laboratories Inc on turvatarkastanut ainoastaan sarjaan AT 200 kuuluvat laitteet Ei potilas laitteina standardin UL544 mukaisesti jonka otsikkona on Lääke ja hammaslääketiedevälineistöstandardi the Standard for Medical and Dental Equipment SALAMANISKUVAARA HENGENVAARA ÄL...

Page 5: ... i gang INSTALLASJON Driftstemperatur Dette produktet har blitt fremstilt til bruk med maksimum romtemperatur på eller 50 grader celsius Alle land Produktet må installeres i samsvar med de lokale og nasjonale elektriske koder ENERGIA IRRADIADA Este produto foi testado e atende aos requisitos para dispositivos comerciais de Classe A nos E U A Este produto foi testado e atende aos requisitos Vfg 243...

Page 6: ... C Para todos los países Monte el producto de acuerdo con los Códigos Eléctricos locales y nacionales ENERGIUTSTRÅLNING Denna handelsprodukt har testats och befunnits vara i enlighet med U S A s krav för klass A utrustning Denna produkt har testats och befunnits vara i enlighet med Tysklands Vfg 243 1991 krav för klass B utrustning SÄKERHET Dessa produkter har säkerhetstestats av UL i enlighet med...

Page 7: ...Data cabling considerations 8 Attaching AUI drop cables for all models 8 Data cabling considerations 8 Checking Operation 9 List of Figures Figure 1 Location of the Heartbeat Switch 2 Figure 2 Assembling the Coaxial Active Tap 4 Figure 3 50 Ω Terminator for Thicknet Segment 5 Figure 4 AT 200 with N Series Thicknet Backbone Connector AT 208 6 Figure 5 AT 200 with Thin Coax Backbone Connector AT 204...

Page 8: ... the cables properly The AT 204 AT 207 and AT 208 are shipped with the coaxial tap body installed With the AT 206 you install the coaxial active tap body when you tap the 10BASE5 cable The AT 205 comes with no tap body Heartbeat configuration All transceivers are shipped with the Heartbeat switch in the 0 disabled position With few exceptions the Signal Quality Error SQE Heartbeat i e Collision Pr...

Page 9: ...eat switch is on the right side of the circuit board Set the switch to the desired setting 1 SQE enabled 0 SQE disabled 4 Install the tap body Figure 1 Location of the Heartbeat Switch Thick Ethernet installation with coaxial active tap assembly for model AT 206 Before installing the AT 206 Single Port Transceiver check to see that the transceiver package contents are complete If any of the follow...

Page 10: ...ry AT 1220 K Hex wrench Combination hex nut driver and coring drill The clamp assembly has a frame that slides onto the tap body a pressure block that holds the cable in place and a button head socket screw The tap body features a cable channel that retains the cable and an internal guide slot to accept the transceiver s PCB The braid terminators are designed to pierce the cable jacket and provide...

Page 11: ...7 Insert the combination nut driver coring drill through the hole in the tap body Drill through the cable to the center conductor The coring drill end has a stop to prevent overdrilling 8 Inspect the hole to be sure no particles remain Hand tighten only Do NOT over tighten or damage could result 9 Using the nut driver end of the tool assembly thread the probe assembly into the tap body until the p...

Page 12: ...are available as tool kit AT 060 K 13 Be sure the cable is terminated at both ends Figure 3 shows a terminator installed at one end of a thicknet segment Figure 3 50 Ω Terminator for Thicknet Segment Thick Ethernet installation with coaxial N series tap for model AT 208 Before installing the AT 208 Single Port Transceiver check to see that the transceiver package contents are complete If any of th...

Page 13: ...st case end to end propagation delay for the segment is 2165 ns Propagation delay of 10BASE5 Ethernet coax is calculated at 4 33 ns meter Both ends of the segment must be terminated with a 50Ω termination with a power rating of 0 5 watts or greater Earth grounding of the segment shield must take place at only one point on the cable Attach the N series tap to cable 1 Attach 10BASE5 coaxial cable us...

Page 14: ...with AT 04 or AT 07 tap Manual Warranty card No assembly of the transceiver is required It comes with the tap body factory installed Figure 5 shows an AT 204 transceiver which is used with a separate T connector and Figure 6 shows an AT 207 which is ready to attach to the thinnet backbone The AT 204 enables you to take the transceiver off the network without interrupting traffic on the segment Fig...

Page 15: ...ce at only one point on the cable Attach the BNC connector to cable 1 Plug a BNC T connector into the BNC receptacle 2 Plug in the 10BASE2 coaxial cable If the AT 200 series transceiver is between nodes on the cable attach a thin coax segment to each side of the T connector If the transceiver is at the end of the segment attach a thin coax segment to one side of the T and a 50Ω terminator to the o...

Page 16: ...transceiver might result in severe damage to the transceiver and void your warranty 1 Connect the cable at the station DTE end and test the pins at the transceiver end to make sure that power does not appear at any pins other than 6 and 13 2 Carefully insert the 15 pin D subminiature connector into the connector on the transceiver 3 Move the slide lock to the locked position this engages the lock ...

Page 17: ...______________________________________________ _______________________________________________________________ Conditions List the steps that led up to the problem ______________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ Detailed description ...

Page 18: ...______________________________ I would like more information on the following ___________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ ______________________________________...

Page 19: ...mation provided herein is subject to change without notice In no event shall Allied Telesyn International Corp be liable for any incidental special 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...

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