Форумы сайта "Отечественная радиотехника ХХ века"

Here is a to some information.
https://www.radiomuseum.org/r/hiradotec ... sonal.html

Sorry to use English. This is a pager manufactured somewhere in the 60s in Hungary. It was used by large companies. There was a wire around the building, and low-frequency signals were used simple messages to transmit to the pagers (Like call this and this number by phone). Each pager had some filte...