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Black Box Short-Haul Modem-C Async (SHM-C Async), 4-Wire, Standalone

$233.45
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  • At a maximum speed of 115.2-kbps, you can go up to 4000 feet.
  • It must be used in pairs.

RS-232 is the most common serial interface in use today. This means you can use your SHM-C in RS-232 installations - industrial applications; security systems; UNIX®, DEC2, and HP® workstation connectivity; and more.

Choose our 4-Wire SHM-C Async to transmit data up to 4 miles (6.4 km). Run loopback tests simply by pressing a front-panel button. Open the flip-top lid for quick DTE/DCE selection.

Transformer and optical isolation protect your data from electrical interference.


  • The ME800A-R4 is backwards compatible with the ME800A-R3.
  • Ideal for point-of-sale applications.
  • Range of up to 6.4 km (4 miles) at 9.6 kbps over 24 AWG lines
  • Data rate up to 115.2 kbps
  • Full duplex operation over 4-wire CATx
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USRobotics 5686G Data/Fax Modem

$149.87
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The USRobotics 56K Serial Controller Faxmodem combines the superior performance and reliability of a controller-based modem with the convenience of V.92 and V.22 technologies - with up to 75% less energy use. V.22 Fast Connect, which reduces the connection sequence time for very small data transfers, and secure connectivity make this modem ideal for Point of Sale (POS) systems. The modem also enables secure Machine to Machine (M2M) applications or Remote Server Management applications for Out-of-Band remote diagnostics, troubleshooting, maintenance and back-ups of servers.


  • This updated modem uses 50% less energy when in use and 75% less energy when idle mode, which makes it more environmentally friendly and will contribute to reducing electricity costs.
  • This modem finds the most efficient path for each connection, assuring the best possible speeds, resulting in faster downloads and fewer dropped calls.
  • Fax features include delayed broadcast and group faxing.
  • Send and receive secure data and faxes through your computer while running other applications.
  • Fast Connect (V.22) allows 1200 bps connections without error control in less than 1 second�, making this modem ideal for POS and ATM transactions that require lightning fast connections.
  • Precise manual volume control
  • Permanently store preferred modem default settings
  • External DIP switches allows manual configuration of specific critical settings
  • Extra LEDs for better monitoring of serial signals
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U.S. Robotics V.92 56K Faxmodem

$23.80
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The V.92 standard gives you the features to get the most out of your home's dial-up connection: send e-mail and attachments faster, get online quicker, and even take incoming phone calls without losing your Internet connection.


  • Send faxes from any Windows application, and receive incoming faxes at any time.
  • Modem on Hold lets you take calls while online without dropping your Internet connection - there's no need for a second phone line. Great for home use!
  • USR Internet Call Notification (ICN) lets you screen incoming calls so you can take the important ones. (Call Waiting and Caller ID require service from your local phone company.)