A plurality of narrow-band channels are established via a switched network between end terminals to provide a wideband facility. Wideband messages are divided into a plurality of narrow-band signals each of which is transmitted over a corresponding narrow-band channel. A data recovery unit connected...http://www.google.com/patents/US4577312?utm_source=gb-gplus-sharePatent US4577312 - Arrangement for wideband transmission via a switched network
Arrangement for wideband transmission via a switched network
