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

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

We currently have 34 in stock.
SKU: MPN: ME800A-R4 UPC:
Product Description
  • 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
  • Full duplex operation over 4-wire CATx
  • Data rate up to 115.2 kbps

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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
  • Full duplex operation over 4-wire CATx
  • Data rate up to 115.2 kbps