Short Range Modem

• 4-wire, full duplex
• Internal filter for high noise immunity
• Data rates up to 19.2 kbps
• DCE/DTE switch
• Transformer-isolated
• No external power required

• Ensures integrity of data transmission over unconditioned 4-wire dedicated lines in noisy environments

The miniature SRM-5A is an asynchronous short range modem connecting full duplex asynchronous terminals to computers. The SRM-5A operates at data rates of up to 19.2 kbps with a range of 4.5 km (2.8 miles) at 9.6 kbps.

Advanced DCE/DTE switch; no cable required

The DCE/DTE switch allows operation as a DTE for connection to another DCE, without requiring a cross cable. It operates without external power by drawing low power from the data and control signals.

Connection to the line is through isolation transformers for protection against AC or DC overvoltages.

The SRM-5A modem is available with an internal filter. The filter is designed to overcome radiated and conducted interference for high noise immunity.