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CentreCOM™ Two-Port Ethernet

Micro Repeater Models

AT-MR11xT, AT-MR11x
AT-MR12xT, AT-MR12x

User Manual

POWER

CentreCOM

MR122T

IEEE 802.3 MICRO REPEATER

PORT 1: 10BASE2

ON LINE

COLLISION

TRANSMIT

RECEIVE

COLLISION

TRANSMIT

LINK

PORT 2: 10BASE-T

RECEIVE

ON LINE

PN 613-10449-00 Rev. B

970130

MR11x/MR12x.4Web Page 1 Monday, February 24, 1997 11:33 AM

Summary of Contents for AT-MR111T

Page 1: ...Models AT MR11xT AT MR11x AT MR12xT AT MR12x User Manual POWER CentreCOM TM MR122T IEEE 802 3 MICRO REPEATER PORT 1 10BASE2 ON LINE COLLISION TRANSMIT RECEIVE COLLISION TRANSMIT LINK PORT 2 10BASE T R...

Page 2: ...wer cord maximum 4 5 meters long rated 6 amp minimum 250V made of HAR cordage molded IEC 320 connector on one end and on the other end a plug approved by the country of end use CAUTION Air vents must...

Page 3: ...nem Ende und am anderen Ende mit einem im Land des Endverbrauchers gepr ften Stecker ausgestattet sein VORSICHT Die Entl ftungs ffnungen d rfen nicht versperrt sein und m ssen zum K hlen freien Zugang...

Page 4: ...LATIE ELEKTRISCH AUTOMATISCHE AANPASSING VAN DE SPANNING Dit toestel past zich automatisch aan elke spanning aan tussen de op het label vermelde waarden ELEKTRISCHE TOESTELLEN VAN KLASSE 1 DIT TOESTEL...

Page 5: ...mukaisesti ja TUV standardin EN60950 mukaisesti TURVALLISUUS ELECTRICAL NOTICES WARNING ELECTRIC SHOCK HAZARD To prevent ELECTRIC shock do not remove cover No user serviceable parts inside This unit...

Page 6: ...massima di 40 gradi centigradi TUTTI I PAESI installare il prodotto in conformit delle vigenti normative elettriche nazionali Sikkerhetsnormer Dette produktet tilfredsstiller f lgende sikkerhetsnormer...

Page 7: ...uma capacidade indicada m nima de 6 amp e 250 V fabricado de material para cabo HAR com conector moldado IEC 320 em uma extremidade e na outra extremidade um plugue aprovado para uso no pa s em quest...

Page 8: ...RICITETSRISK RISK F R ELEKTRISK ST TF r att undvika ELEKTRISK st t ta ej av locket Det finns inga delar inuti som beh ver underh llas Denna apparat r under H GSP NNING och f r endast ppnas av en utbil...

Page 9: ...and AT MR121T allow for connection of a UTP 10Base T Ethernet segment to a thick 10Base5 segment and the AT MR112T and AT MR122T allow for connection of a UTP 10Base T Ethernet segment to a thin l0Bas...

Page 10: ...ple on the AT MR112T and AT MR122T BNC to UTP both ports have Transmit Receive On Line and Collision indicators In addition the UTP port has a Link integrity indicator Cabling AUI Connections CentreCO...

Page 11: ...r will allow use with either type of cable If you are not sure of the UTP cable pinout set the switch into the position that gives a valid Link indication for the UTP connection Figure 2 10Base T UTP...

Page 12: ...over MDI X position Figure 3 10Base T UTP Crossover Cabling External Power Supply Micro Repeaters The AT MR11x Micro Repeaters have external power adapters Locate a 120 VAC outlet and plug in the prov...

Page 13: ...2T AT MR122T AT MR114T AT MR124T AT MR115 and AT MR125 have a switch for selecting or deselecting the internal 50 termination function for the thinnet connection Note The factory default of the 50 ter...

Page 14: ...SMIT COLLISION ON LINE RECEIVE TRANSMIT PORT 2 10BASET COLLISION ON LINE COLLISION ON LINE MR111T IEEE 802 3 MICRO REPEATER CentreCOM POWER AUI PORT 1 PORT 2 MDI MDI X 10BASET MR112T IEEE 802 3 MICRO...

Page 15: ...N POWER COLLISION ON LINE RECEIVE TRANSMIT COLLISION ON LINE COLLISION ON LINE COLLISION ON LINE RECEIVE TRANSMIT PORT 1 AUI MR114 IEEE 802 3 MICRO REPEATER CentreCOM TM ON LINE COLLISION POWER COLLIS...

Page 16: ...ATOR TERMINATOR TM COLLISION RECEIVE TRANSMIT POWER CentreCOM TM MR121T IEEE 802 3 MICRO REPEATER PORT 1 AUI COLLISION TRANSMIT RECEIVE ON LINE COLLISION TRANSMIT LINK PORT 2 10BASE T RECEIVE POWER AU...

Page 17: ...AUI PORT 2 POWER CentreCOM TM MR124 IEEE 802 3 MICRO REPEATER PORT 1 AUI ON LINE COLLISION TRANSMIT RECEIVE ON LINE COLLISION TRANSMIT PORT 2 10BASE2 RECEIVE POWER AUI PORT 1 CentreCOM TM MR124 IEEE 8...

Page 18: ...ater to test and validate the segment Caution On a 10Base T UTP port the Link indicator is not illuminated With 10Base T Ethernet most problems are with the UTP wiring 1 Check that the UTP crossover s...

Page 19: ...Too many collisions 1 On an AUI port make certain that the SQE Test heartbeat switch is OFF on any transceiver attached to the port 2 Check the media connections and cabling Excessive collisions may b...

Page 20: ...MICRO REPEATER OFF ON TERMINATOR RJ45 PIN OUT MDI MDI X 10BASE T PORT 2 POWER 10BASE 2 PORT 1 CentreCOM TM MR122T IEEE 802 3 MICRO REPEATER OFF ON TERMINATOR RJ45 PIN OUT MDI MDI X 10BASE T PORT 2 PO...

Page 21: ...5 Thick Ethernet 500 Meters and 100 MAU Max AUI Cable 50 Meters Max 50 Terminator 50 Terminator 50 Terminator Thin Ethernet 185 Meters Max 30 MAU Max 10BASE2 POWER AUI TERMINATOR MR114 IEEE 802 3 MICR...

Page 22: ...10Base2 10Base5 and 10Base T UTP is point to point wiring Typically an Ethernet 10Base T transceiver MAU is connected to one end and a 10Base T Hub Repeater is connected to the other Straight through...

Page 23: ...from farthest ends may not exceed 51 7 s Propagation delay is the time it takes a signal to travel from the input of a system component to the output Propagation delay is usually measured in nanoseco...

Page 24: ...00 126 49 30 435 70 650 Hong Kong 852 2 529 4111 852 2 529 7661 Italy Italy Spain Portugal Greece Turkey Israel 39 2 416047 39 2 419282 Japan 81 3 3443 5640 81 3 3443 2443 United Kingdom United Kingdo...

Page 25: ...Tel 602 423 7087 Fax 602 423 7088 Los Angeles CA Tel 310 412 8684 Fax 310 412 8685 Mission Viejo CA Tel 714 699 0628 Fax 714 699 0276 San Diego CA Tel 619 279 3899 Fax 619 279 3897 Santa Ana CA Tel 7...

Page 26: ...ument 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 incidental special indirect...

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