Transmission system

DS-726/T3 full-duplex T3-carrier fiber-optic modem system transmits data at 44.736 Mbits/sec over a multimode fiber-optic cable by using 865-nm short or 1310-nm long optical-wavelength devices. Transmission distance can vary from a few feet to 10 km, without optical receiver overload. The unit features 29-dB optical gain with 50/125- and 9/125-micron fiber-optic cable, built-in fault-detection capabilities and dual-operating power at 15V and -48V DC. At 1300 nm, the optical transmitter provides launch power of -21 to -24 dBm, depending on the fiber used. Receiver sensitivity is -32 dBm, and the link budget for 62.5-micron fiber is 11 dB. At 850 nm, the transmitter runs at launch powers of -15 to -18 dBm, depending on the fiber used. Receiver density is -32 dBm, and the link budget for 62.5-micron fiber is 17 dB. The modems come in 5x7x1.5-inch stand-alone modules, but can be installed in a 19-inch rack via a metal faceplate. They accept multimode ST amd SMA connectors, and singlemode ST and FC connectors. Operating temperature is -20° to +70°C. Singlemode and multimode versions are priced at $3885 and $1895, respectively. Wall mounts and rack adapters are available for remote stand-alone unit installation.

Opticomm Corp.

San Diego, CA