Differential dense wavelength division multiplexing (ddwdm)...

Digital added main line system

Digital audio transmission system

Digital automatic gain control

Digital bit rate converter

Digital bit rate converter

Digital block processor for transmitting a plurality of...

Digital bus communications system

Digital carrier channel bus interface module for a...

Digital carrier-concentrator system with tasi

Digital channelizer having efficient architecture for cyclic...

Digital channelizer having efficient architecture for...

Digital coin circuit

Digital communication station signaling control

Digital communications system using complementary codes and...

Digital communications system with symbol multiplexers

Digital control channels having logical channels for...

Digital data communications system packet switch

Digital data concentrator

Digital data interface device message format