Dual band unidirectional scheme in a cellular mobile radio...

Dual band unidirectional scheme in a cellular mobile radio...

Dual-band data communication device

Dual-mode analog/digital adaptive echo cancellation in...

Duplex communication path switching system

Duplex signal multiplexing system

Duplexer and communication device

Duplexer having dual coupled line characteristics

Duplexer with a differential receiver port implemented using...

Dynamic allocation of radio capacity in a TDMA system

Dynamic control protocol for frame relay fragmentation in...

Dynamic establishment of virtual circuits using...

Dynamic link parameter control

Dynamic link parameter control

Echo canceler

Echo canceler gain tracker for cellular modems

Echo canceling apparatus having a plurality of frame aligners as

Echo canceling method and apparatus for data over cellular

Echo canceling method and apparatus for digital data...

Echo canceling system