Electro Standards Laboratories

ESL offers a complete solution for the quick installation of MTP/MPO fiber cables: MTP/MPO patch cables, QuickConnect cassettes that break-out multi-fiber MTP/MPO cable inputs into SC, LC or ST connectors and a rackmount fiber patch enclosure.

The Model 4143 Automatic Fallback A/B Switch can be switched manually or remotely. A transition from 5 VDC to 0 VDC on Pin 9 of the DB25 Common port triggers the unit to switch positions.

The Model 4124 features automatic fallback based on loss of data on port A. Special mounting hardware is available for on-board ship use.

The Model 4145 monitors carrier presence (DCD) signal on the primary line, port A. If carrier is lost, the unit automatically switches to port B.

Model 4135 network switch allows sharing a DB9 device connected to the COMMON port connector among two other devices connected to the A and B ports.

The Model 4123 monitors data activity on both port A and B. If activity on the currently connected port is lost, and if the other port has established valid activity, the unit automatically switches to that port with activity.

The Model 4121 network A/B switch monitors data activity on port A. If activity is lost, the unit automatically switches to port B.

Electro Standards Laboratories manufactures a complete selection of telephone and telecom patch cables that are compatible with all standard telephone systems, data and voice test equipment, and patch and interconnect devices.

The Model 4010 RS232/RS485 Interface Converter is a bi-directional device that converts RS232 level data signals to valid RS485 levels, and RS485 level data signals to valid RS232 levels.

Model 4162 and Model 4169 comprise a Host and a 4-Port Hub that extend USB connections via a high speed Fiber Interface.