The ASM-10/8 long range modem operates full or half duplex with synchronous or asynchronous transmission format over unconditioned dedicated copper lines.
ASM-10/8 has an extended range of up to 28 km (17.5 miles) over 24 AWG copper lines and operates at eight selectable data rates of up to 19.2 kbps.
The modem uses conditioned differential diphase modulation (EUROCOM Std. D1), which provides immunity to background noise and eliminates normal line distortion for efficient transfer of serial data over twisted pair cable.
ASM-10/8 is coupled to the dedicated line through isolation transformers which, in conjunction with other circuitry, protect against AC or DC overvoltage. The protection circuitry enables operation even when DC voltage is connected to the line.
