Downstream digital telephony signals are transmitted over the 1310 nm transmission band of a silica optic fiber. Upstream digital telephony signals are transmitted over a "short wavelength" portion of the 1550 nm transmission band of the optic fiber, i.e. within a portion of the 1550 nm transmission...http://www.google.es/patents/US5969836?utm_source=gb-gplus-sharePatente US5969836 - Method and apparatus for simultaneous transmission of digital telephony and analog video over a single optic fiber using wave division multiplexing
Method and apparatus for simultaneous transmission of digital telephony and ...
