Magazine article Information Today

Sync Short Haul Modem from Telebyte

Magazine article Information Today

Sync Short Haul Modem from Telebyte

Article excerpt

Sync Short Haul Modem from Telebyte

A new synchronous short haul modem, the Model 93, designed to function point-to-point or in a multi-drop polled network, has been introduced by Telebyte Technology Inc.

Multi-dropped operation is achieved by the Model 93 using a daisy-chained approach to system wiring in which each Model 93 regenerates the signal before passing it on to the next modem on the link. This process of incorporating signal repeaters results in extremely high data reliability, especially at long distances. At 19,200 baud the Model 93 will support link distances of one mile.

The opto-isolation feature assures that devices connected to the Model 93 are electrically isolated from each other, thereby eliminating problems associated with potential differences between grounds.

The Model 93 provides full duplex synchronous serial data communication from 150 to 19,200 baud using a Manchester Encoded self-clocking signal. Transmission of a self-clocking signal on a balanced opto-isolated current-loop allows transfer of clocking information as well as data. …

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