Black Box Short-Haul Modem-C Async (SHM-C Async), 4-Wire, Standalone — computers, electronics, data.

• This means you can use your SHM-C in RS-232 installations-industrial applications; security systems; UNIX®,…
• Choose our 4-Wire SHM-C Async to transmit data up to 4 miles (6
• Run loopback tests simply by pressing a front-panel button
• Transformer and optical isolation protect your data from electrical interference
• NOTE: SHM-C Async Modems must be used in pairs