The GSM1000 Gigabit converter provides conversion from a Multi-Mode (1000Base-SX) or Single Mode (1000Base-LX) Link to a single-mode (1000Base-LX) link allowing its extension of up to 80km. As many of the GBE switches or NICs come with SX ports, combining such with the GSM1000 provides the most flexible and cost effective way to extend their reach over fiber. The GSM1000 is based on a full digital technology: analog signals from one port are converted to digital electrical signals, fully retimed then converted again to the second F/O port. This design provides a reliable and steady conversion , advanced control/diagnostic features and Management. In addition it allows cascading of several devices, reaching distances of hundreds of km. FibroLAN's unique Link Segmentation Test (LST) allows easy link segmentation (selective per port) to facilitate network diagnostics and overcomes the fault propagation which is inherent to GBE F/O links. A Loop-Back function on each F/O port simplifies troubleshooting of link problems. Each port provides separate Link and Activity indications for enhanced diagnostics. The GSM1000 is also available in SNMP managed versions. Alternatively, GSM1000/MA models may be fully managed remotely via a system. The device is housed in a robust metal case suitable for desktop, rack-shelf or wall-mount installation. It features an internal, wide-range, quality power supply for trouble free installation and reliable operation. DC powered versions (-48VDC) are available. The ETR (Extended Temperature Range) option allows deployment in non-office environments.