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JULY 2003
ME1791A-F
ME1794A-F
Ultra-Miniature
Asynchronous Short
Range Modems
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
CUSTOMER
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
SUPPORT
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
INFORMATION
Web site: www.blackbox.com • E-mail: info@blackbox.com
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Summary of Contents for Black Box ME1791A-F
- Page 1 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) CUSTOMER FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 SUPPORT Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...
- Page 3 Compact, lightweight, easy to install. Versions The following versions of the modem are available: • ME1791A-F – modem with female DCE connector and terminal block line connector • ME1794A-F – modem with female DCE connector and RJ-45 line connector. Application...
- Page 4 ME1791A-F, ME1794A-F Table 1. Typical Transmission Ranges Data Rate 19 AWG 24 AWG 26 AWG [kbps] [km] [miles] [km] [miles] [km] [miles] 19.2 The modems incorporate innovative circuitry design, which enables the units to operate without connection to the mains supply, by using ultra low power from the standard RS-232/V.24 data and control signal voltages.
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Page 5: Technical Specifications
(two twisted pairs) Transmission Mode Asynchronous, full duplex Transmission Level -6 dBm Table 1 Range Connector • ME1791A-F: 4-screw terminal block • ME1794A-F: RJ-45 DCE Interface Type RS-232/V.24 Up to 19.2 kbps Data Rate Control Signals DSR (Circuit 107) and DCD (Circuit 109) turn on immediately after the terminal raises DTR (Circuit 108.2);... - Page 6 ME1791A-F, ME1794A-F Installation Installation of the modems is simple and straightforward, just follow these steps: 1. Connect the 4-wire dedicated line to the line connector; transmit pair to ‘XMT’ and receive pair to ‘RCV’. Observe the following pin polarity between the local and remote units:...
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