Time-Division Multiplexor
Contents
1. Setting SW1 position 3 to ON will select 25 stop bit reduction Setting SW1 position 3 to OFF will select 12 5 stop bit reduction 3 4 Channel 1 Sync Async SWI position 5 selects channel 1 as a sync or async channel This selection must be the same on both ends of the circuit for the units to operate correctly Setting SW1 position 5 to ON will select asynchronous operation on channel 1 Setting SW1 position 5 to OFF will select synchronous operation on channel 1 3 5 Equipment Grounding SWI position 6 connects Pin 1 Chassis Ground to Pin 7 Signal Ground 3 6 Factory Straps SWI position 4 is not used It must be in the OFF position Jumpers JP1 through JP3 must be installed for proper operation e gt lt a 5 4 3 7 Board Layout and Jumper Settings 5 86 NO sugg 44O Sud 440 NO SugOL 340 330 2 L LMS 01609 2 NO punou9 sisseu 0 pejyoeuuo punou jeuBis 2446 ueu2 NO 2u sy UeYD NI 38 1SNIN 38 LSNW 4581 Moyea 340 dois S ZL NO dois 62 1591 0 Z 5 40 99UU0D Figure 3 1 Board Layout BLACK BOX Copyright 1999 Black Box Corporation All rights reserved 1000 Par2. al manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n 18 Servicio por personal calificado deber ser provisto cuando A El cable de poder o el contacto ha sido da ado u B Objectos han ca do o l quido ha sido derramado dentro del aparato o C El aparato ha sido expuesto a la lluvia o D El aparato parece no operar normalmente o muestra un cambio en su desempe o o E El aparato ha sido tirado o su cubierta ha sido da ada TIME DIVISION MULTIPLEXOR TRADEMARKS UL is a registered trademark of Underwriters Laboratories Incorporated The trademarks mentioned in this manual are the sole property of their owners TIME DIVISION MULTIPLEXOR Contents TSS peciiCatons o GI o A ee exar 6 ded 7 3 Setup and Installation 0 8 Installatt n eX lE Ev RIPE ee mue is 8 3 2 Character Length rini ste Re eL cnp eee o 8 3 8 Stop Bit Reduction 1 8 3A Channel T Sync ASyne vene o SEWER 8 3 5 Equipment 8 3 6 Factory Straps i i bicelles ate um rete ead 8 3 7 Board Layout and Jumper 9 TIME DIVISION MULTIPLEXOR 1 Specifications Applications RS 232 sync or async 2 sub channel multiplexor Capacity 2 sync or 1 sync
3. and 1 async RS 232 terminals 1 sync RS 232 modem Data Format Data coding synchronous or asynchronous Data Rates Async 600 bps to 19 2 kbps or sync up to 19 2 kbps with 38 4 kbps composite Data Interface EIA RS 232C Connectors 3 DB25 female Enclosure Aluminum Approvals FCC Class A UL CSA Operating Temperature 32 to 122 F 0 to 50 C Relative Humidity Up to 90 noncondensing Altitude Up to 10 000 feet 3048 m Power Requirements 110 or 220 VAC 47 63 Hz 5 W external wallmount transformer Size 2 H 8 3 W x 6 1 D 5 1 21 1 x 15 5 cm Weight 2 25 Ib 1 kg TIME DIVISION MULTIPLEXOR 2 Introduction The Time Division Multiplexor is a full duplex RS 232 2 channel time division multiplexor with an independent switch selectable V 14 V 22 compliant asynchronous to synchronous interface adapter on sub channel 1 The composite channel is designed to interface directly with a high speed synchronous modem via a straight through cable The unit operates by sequentially selecting a bit of data from the sub channel and then multiplexing it onto the composite channel Each sub channel can operate at 4 the composite channel rate Standard DB25 female connectors are provided on all sub channels as well as the composite channel Power is provided by an external transformer connected through J1 Power on the rear of the mutliplexor The external power transformer is UL and CSA approved F
4. deber ser referido a personal de servicio calificado El aparato el ctrico debe ser situado de tal manera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor El aparato el ctrico deber ser connectado a una fuente de poder s lo del tipo descrito en el instructivo de operaci n o como se indique en el aparato TIME DIVISION MULTIPLEXOR 12 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada 13 Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de t
5. e BL ACK BOX MX560A Time Division Multiplexor CUSTOMER SUPPORT INFORMATION Order toll free in the U S Call 877 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com TIME DIVISION MULTIPLEXOR FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not
6. exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la classe A prescrites dans le Reglement sur le brouillage radio lectrique publi par Industrie Canada TIME DIVISION MULTIPLEXOR 10 11 NORMAS OFICIALES MEXICANAS NOM ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado Las instrucciones de seguridad y operaci n deber n ser guardadas para referencia futura Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas Todas las instrucciones de operaci n y uso deben ser seguidas El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de ba o lavabo s tano mojado o cerca de una alberca etc El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las instrucciones de operaci n Todo otro servicio
7. k Drive Lawrence 15055 1018 724 746 5500 Fax 724 746 0746
8. ront panel LEDs include SYNC and Power When two TDMs are in sync with each other and data transmission is possible the SYNC LED should be lit The Power LED should be on at all times Three DB25 female connectors are provided for connecting the modem on the composite port J2 and two terminals Channel 1 J3 can be used for synchronous or asynchronous operation Channel 2 J4 can be operated only as a synchronous channel Channel 1 must be used as either sync or async on both ends of the circuit for the multiplexor to function properly Host Processor Sync Terminal Terminal Time Division Time Division Multiplexor Multiplexor Figure 2 1 Typical Application 3 Setup and Installation 3 1 Installation Set switches to match the required configurations as described in Sections 3 2 through 3 5 The cabling between each device and the Time Division Multiplexor must be terminated with male connectors Character length and stop bit reduction only apply to channel 1 when it is selected for asynchronous operation 3 2 Character Length SWI positions 1 and 2 select the character length The character length includes the start stop and any parity bits 10 bit length is 1 start bit 8 data bits and 1 stop bit Figure 3 1 outlines all the available character bit lengths available 3 3 Stop Bit Reduction SW position 3 selects the percentage of stop bit reduction to occur when the sync rate is faster than the async rate
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