Vi-Link ITS equipment: The VK25 is an extremely reliable low-cost point-to-point one fiber optic synchronous data modem. It is designed to link a remote terminal to the host computer via one or two single-mode optical fibers. Users may plug the VK25 modem directly into any EIA-RS422 interface. Application options provide the flexibility to meet many requirements, supporting single-mode fiber and all major connection types.
The VK25 multiplexer can transfer asynchronous data up to 5 Mbps with RS-422 (RS-530) interface. It provides a DCD signal when the receiver has received a data signal from the far end while the RTS and DTR control signals are internally loop backed for handshaking applications. Transmission distances can be used up to 50 Km with one single mode fiber optic cable.
The VK25 is designed for any general-purpose application between data communication equipment. Typical applications include remote terminal to host computer connections, tail circuits to multiplexers, monitoring equipment to a central control system, and situations requiring extended distances. It may also use in harsh environments because fiber optic cable is virtually impossible to tap without detection.
Applications for the VK25 Series include campus fiber Traffic Control System, Metro Operation System, SCADA systems, Campus Networks and military applications.

EIA RS-422 Interface
Synchronous Data Modem
Speed Up To 5 Mbps
One or Two Fibers
Distances Up To 50 Km
AGC Receivers
Extend Temperature NEMA Range