The ISMS converts 10/100Mbps 10BASE-T-100BASE-TX Fast Ethernet twisted pair signals to 100BASE-FX single-mode signals 20KM , 40KM  apart.

The ISMS convert 10/100Mbps 10BASE-T/100BASE-TX Fast Ethernet twisted-pair signals to 100BASE-FX Fast Ethernet single-mode fiber signals. Maximum fiber cable distance is 15 - 60 km. 1 RJ-45 twisted-pair port and 1 fiber port (SC connector) are provided.

ISMSA20 + ISMSR20 : this media converter supports maximum 20 km fiber cable distance.

ISMSA40 + ISMSR40 : this media converter supports maximum 40 km fiber cable distance.

The media converters come with their own solid metal case housing, LED status indicators and external AC power adapters.