描述： Speeds up to 38.4 kbps. Distances up to 6 miles (9.6 km). Async or sync operation, point-to-point or multipoint. Nonpowered, so you can install it where it's most convenient. Internal, external, or receive loopback clocking in sync mode. V.54 loopback and V.52 BERT pattern generator. 规格：
Built-in LEDs enable you to monitor test mode operation. Transformer isolation and surge protection guard against data loss.
The BLACK BOX? Multifunction Line Driver gives you the distance you need. Plus, this miniature modem requires no external power, so you can install it where it’s most convenient.
