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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
Async SHM-NPR
MARCH 1997
ME6100A-F
ME6100A-M
ME6101A-F
ME6101A-M
ME6102A-F
ME6102A-M
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Summary of Contents for Black Box SHM-NPR Series
- 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 ASYNC SHM-NPR TRADEMARKS All applied-for and registered trademarks are the property of their respective owners.
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Page 3: Table Of Contents
ASYNC SHM-NPR CONTENTS 1. Specifications ..... . .5 2. Introduction ......7 2.1 Description . -
Page 4: Specifications
ASYNC SHM-NPR 1. Specifications Transmission Mode — Asynchronous, full or half duplex Transmission Line — 4-wire unconditioned telephone line (two twisted pairs) Data Rates — Up to 19,200 bps Transmission Level — -6 dBm Transmission Controls — DCD (Circuit 109) turns on after recognizing the receive signal from the line;... - Page 5 ASYNC SHM-NPR Terminal Interface — EIA RS-232C/CCITT V.24, integral 25-pin connector, choice of male or female Telephone Line Interface — 5-screw (4-wire and ground) connector block with cable strain relief inside plastic cover Temperature — 32 to 122 °F (0 to 50 °C) Humidity —...
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Page 6: Introduction
ASYNC SHM-NPR 2. Introduction 2.1 Description The Async SHM-NPR is used for local data distribution, connecting full- or half-duplex asynchronous terminals to computers. A pair of modems ensures integrity of data transmission, over unconditioned 4-wire telephone lines, for distances of up to 2 miles (3.2 km). The SHM-NPR is a high-speed synchronous modem operating at 76.8 Kbps. - Page 7 ASYNC SHM-NPR The SHM-NPR features a DCE/DTE switch. This allows it to operate as a DTE in order to connect to another DCE, such as a multiplexor port, without requiring a cross cable. The carrier can be strapped for either continuous operation (point-to-point applications) or for switched operation, controlled by the RTS signal (multi-point applications).
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Page 8: Features
ASYNC SHM-NPR 2.2 Features • Insensitive to wire polarity • Asynchronous transmission • Up to 19,200 bps • Full- or half-duplex • Point-to-point or multipoint • Transmission range of up to 2 miles (3.2 km) • DCE/DTE switch • Strain relief for line cable •... -
Page 9: Installation
ASYNC SHM-NPR 3. Installation Installation of the Async SHM-NPR is simple and straightforward. Follow these steps: 1. Separate the two parts of the plastic cover by pressing the marked places on the side, starting at the cable end. 2. Connect 4-wire telephone line to the screw terminal block: transmit pair to “XMT”... - Page 10 ASYNC SHM-NPR Table 3-1. Strap Selection. Strap/Switch Identity Function Position Factory Setting DCE/DTE Selects SHM-NPR interface Carrier Selects carrier constantly on or switched by RTS Controlled RTS/CTS Selects RTS/CTS 1 msec 1 msec Delay delay 12 msec Figure 3-1. Strapping Diagram.
- Page 11 © Copyright 1997. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...
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