Telephone Type for Flexible Internal Communications
The TD-H handset style selective-call system, used for internal
communications in an office, factory, warehouse, store, restaurant
or home, leaves the telephone system free for important outside calls.
A number of individual conversations can occur simultaneously,
as compared to common talk systems, where one conversation occupies
the entire system. There is a talk channel available for every pair
of stations in the system. For example, with a 12-station system,
6 independent conversations can be happening at once, which is
essential for business and industrial uses.