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Black Box MX625A Manual
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Black Box MX625A Manual

Black Box MX625A Manual

2-channel async tdm
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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

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Summary of Contents for Black Box MX625A

  • Page 1 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...
  • Page 2 2-CHANNEL ASYNC TDM FEDERAL COMMUNICATIONS COMMISSION 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...
  • Page 3 2-CHANNEL ASYNC TDM NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
  • Page 4 2-CHANNEL ASYNC TDM 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor. 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato.
  • Page 5 2-CHANNEL ASYNC TDM TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 6: Table Of Contents

    2-CHANNEL ASYNC TDM Contents Chapter Page 1. Specifications ......6 2. Introduction ......10 2.1 Features .

  • Page 7: Specifications

    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)
  • Page 8 2-CHANNEL ASYNC TDM Power—No AC power required; uses 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)
  • Page 9 2-CHANNEL ASYNC TDM Table 1-1. Strap Selection. Strap Function Possible Definitions Normal Identity Positions Factory Setting Data Selects the data 9600 bps Rate rate on the 4800 bps sub-channels 2400 bps 2400 bps (same for both) 1200 bps 600 bps 300 bps 150 bps Parity...
  • Page 10 2-CHANNEL ASYNC TDM NOTE When using no parity, 2 stop bits are necessary.

  • Page 11: Introduction

    2-CHANNEL ASYNC TDM 2. Introduction The 2-Channel Async TDM is a full-duplex, character-interleaved 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.

  • Page 12: Typical Application

    2-CHANNEL ASYNC TDM • Easy to install and configure • Miniature and lightweight 2.2 Typical Application Figure 2-1 shows a typical application of the 2-Channel Async TDM. MX625A MX625A Async Modem Async Modem Computer Async Terminals Figure 2-1. Typical Application.

  • Page 13: Installation

    2-CHANNEL ASYNC TDM 3. Installation Installation of the 2-Channel Async TDM is simple and straightforward. 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.
  • Page 14 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 SW8) to the appropriate position.
  • Page 15 2-CHANNEL ASYNC TDM Table 3-1. Sub-Channel Cable. V.24/RS-232 Pin No. Pin No. Signal Terminal (Optional) (Optional) (Optional) (Optional) NOTE Wires marked as “Optional” may be omitted, unless required by the equipment connected to the TDM.
  • Page 16 NOTES...
  • Page 17 © Copyright 1997. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...