Vi-Link ITS equipment: The VK23 is an extremely reliable low-cost point-to-point one-channel fiber optic 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 VK23 modem into any selectable EIA-RS232 or EIA-RS422/485 interface. Application options provide the flexibility to meet many requirements, supporting single-mode fiber and all major connection types.
The VK23 multiplexer can transfer asynchronous data up to 112 Kbps with RS-232 or RS-422/485 interfaces. 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 40 Km with one single mode fiber optic cable.
The VK23 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 used in harsh environments because fiber optic cable is virtually impossible to tap without detection.
Applications for the VK23 Series include campus fiber Traffic Control System, Metro Operation System, SCADA systems, Campus Networks and military applications.

Selectable RS-232 or RS-422/RS-485 Interfaces
Asynchronous Data Speed Up To 112 Kbps
One or Two Fibers
Distances Up To 50 Km
AGC Receivers
Extend Temperature NEMA Range