Universal optical signal receiver
Universal remote control device
Upgradable fiber-coax network
Upgradable modular wavelength division multiplexer
Upgradable optical communication system module
Upgradeable remote control device
Upgrading a power-splitting passive optical network using optica
Upgrading optical communications systems without traffic...
Use of bandwidth efficient modulation techniques in a...
Use of cross tap equalization to reduce crosstalk arising...
Use of higher order modulation techniques to transmit...
Use of mode coupled optical fiber in communications systems
UV source for high data rate secure communication