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JULY 1997
MC124A
Tail-Circuit Adapter (TCA-232)
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: 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 TCA-232
- Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
- Page 2 TCA-232 TRADEMARKS All applied-for and registered trademarks are the property of their respective owners.
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Page 3: Table Of Contents
TCA-232 CONTENTS 1. Specifications ......5 2. Introduction ......6 2.1 Description . -
Page 4: Specifications
Data Rate — Up to 256 Kbps Tail-to-System Buffering — 16-bit buffer, automatic centering Connectors — (2) DB25 female DCE to DTE Connection — The TCA-232 provides cross-pinning function Temperature — 32 to 140°F (0 to 60°C) Humidity — Up to 95%, noncondensing Power —... -
Page 5: Introduction
TCA-232 2. Introduction 2.1 Description The Tail-Circuit Adapter (TCA-232) has a 16-bit buffer that helps you synchronize clock signals in your tail circuit. Data is transferred from the multiplexor directly to the adjacent modem, using the mux receive clock (pin 17), which is also provided to the modem external clock (pin 24). -
Page 6: Installation
TCA-232 3. Installation 1. Connect the side of the TCA-232 labeled “SYSTEM, J1” to the multiplexor sub-channel or the main modem. 2. Connect the side of the TCA-232 labeled “TAIL, J2” to the local modem. The local modem should be strapped to external clock. -
Page 7: Application
TCA-232 4. Application The TCA-232 is used to couple two DCE devices together whose clocks are of the same frequency but are not “in phase.” An example is an extension of a multiplexor channel using modems in a “tail circuit” (see Figure 4-1). - Page 8 TCA-232 Modem Modem Terminal (External (Clock Clock) Loopback) Figure 4-1. Typical Application.
- Page 9 TCA-232 MODEM BUFFER ECLK SYSTEM TAIL EXTERNAL CLOCK Figure 4-2. Schematic Diagram of Data Flow.
- Page 10 © Copyright 1997. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...