2-Channel Async TDM
Contents
1. BLACK BOX mmm MARCH 1997 MX625A 2 Channel Async TDM 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 2 CHANNEL ASYNC TDM FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA 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 B 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 exceed the Class A limi2. by strapping STOP BITS SW3 and SW4 to the appropriate position 2 CHANNEL ASYNC TDM NOTE When using No Parity 2 stop bits are required 4 Select parity enable or disable for each channel by strapping PARITY ENABLE to the appropriate position SW5 and SW6 5 Determine the number of data bits to suit your equipment and strap DATA BITS SW7 and SVV8 to the appropriate position Use one selection for both channels 6 Refasten the cover Connect each sub channel to your units by using straight through cables and connect the main channels to the modem or multiplexor DIP Switches Parity Select Ch1 Parity Select Ch2 Stop Bits Ch1 Stop Bits Ch2 Parity Enable Ch1 Parity Enable Ch2 Data Bits Ch1 Data Bits Ch2 9600 4800 2400 1200 600 300 150 llollallal oN GR N 4 Figure 3 1 Strapping Diagram 2 CHANNEL ASYNC TDM Table 3 1 Sub Channel Cable V 24 RS 232 de No Pin No Signal Terminal Optional RD 3 3 RTS 4 4 DTR 20 20 NOTE Wires marked as Optional may be omitted unless required by the equipment connected to the TDM NOTES lt BLACK BOX Copyright 1997 Black Box Corporation All rights reserved 1000 Park Drive e Lawrence PA 15055 1018 e 724 746 5500 e Fax 724 746 0746
3. 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 2 CHANNEL ASYNC TDM 0 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 1 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 2 Precauci n debe ser tomada de tal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada 3 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 4 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 5 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 6 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 7 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orifici
4. have 1 parity bit and 1 or 2 stop bits If the parity bit is not generated by the DTE the characters must have 2 stop bits Parity of each sub channel can be independently set to odd or even 2 1 Features e Full duplex TDM e Selectable data rates from 150 bps to 9600 bps e No AC power required 2 CHANNEL ASYNC TDM e Easy to install and configure e Miniature and lightweight 2 2 Typical Application Figure 2 1 shows a typical application of the 2 Channel Async TDM MX625A MX625A ZER e LL Async Modem Async Modem RN Computer Async Terminals Figure 2 1 Typical Application 3 Installation Installation of the 2 Channel Async TDM is simple and stralghtforward Refer to Table 1 1 for the factory setting If the factory setting does not suit your requirements you can change it as follows Remove the cover by pressing the four markings on the sides Strapping information for individual straps is printed on the PCB of the TDM 1 Determine the data rate which should be the same for both channels and strap DATA RATE to the speed appropriate for your equipment The setting represents the rate of the sub channel 2 Select the parity even or odd for each channel by strapping PARITY SELECT SWI and SW2 to the appropriate position If no parity select either even or odd 3 Select the number of stop bits for each channel
5. os de ventilaci n 8 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 2 CHANNEL ASYNC TDM TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged lo be the property of the trademark owners 2 CHANNEL ASYNC TDM Contents Chapter Page l Specifications u e Lee 6 2 Introduction u e eee 10 2 Features s seients deies iaia 10 2 2 Typical Application 11 Ss Installation ies cie es tac id 12 2 CHANNEL ASYNC TDM 1 Specifications Number of Subchannels 2 both operating at the same rate Transmission Format Asynchronous Data Rate Up to 19 200 bps for main channel up to 9600 bps for sub channels see Table 1 1 for data rate selection Number of Data Bits 5 6 7 or 8 Stop Bits 1 or 2 Parity Even odd or no parity 2 stop bits are required for no parity Interface V 24 RS 232 three 25 pin female connectors attached to the unit Temperature 32 to 122 F 0 to 50 C Humidity Up to 90 non condensing 2 CHANNEL ASYNC TDM Power No AC power required use
6. s ultra low power derived from the data and control signals Size 1 2 H x 4 4 W x 7 3 D 3 2 x 11 4 x 18 9 cm Weight 10 oz 285 g 2 CHANNEL ASYNC TDM Table 1 1 Strap Selection Strap Identity Stop Bit Sw3 sw4 Parity Enable Sw5 SW6 Function Selects the data rate on the sub channels same for both Selects parity for each channel Selects number of stop bits for each channel Selects parity enable or disable for each channel Selects number of data bits same for each channel Possible Definitions Positions 9600 bps 4800 bps 2400 bps 1200 bps 600 bps 300 bps 150 bps 1 stop bit Normal Factory Setting 2400 bps 1 stop bit 2 stop bits with 6 7 or 8 data bits ENABLE ENABLE DISABLE 7 bits 2 CHANNEL ASYNC TDM NOTE When using no parity 2 stop bits are necessary 2 CHANNEL ASYNC TDM 2 Introduction The 2 Channel Async TDM is a full duplex characterinterleaved time division multiplexor enabling two asynchronous terminals to share one asynchronous modem or a multiplexor port Its two async sub channels operate at the same data rate selectable up to 9600 bps The main channel operates at twice that rate up to 19200 bps The 2 Channel Async TDM is compatible with async character formats using 5 6 7 or 8 data bits Both sub channels must use the same number of data bits and the same total number of bits The async character format should
7. ts for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de classe A prescrites dans le Reglement sur le brouillage radio lectrique publi par Industrie Canada NNEL NCTDM 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 deber ser referido a personal de servicio calificado El aparato
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