Device and method for suppressing DSL signal echo induced by...
Device for remotely testing a twisted pair transmission line
Device for testing telecommunication terminals, in particular mo
Diagnosing fault patterns in telecommunication networks
Diagnostic device for troubleshooting remote digital feature pho
Diagnostic mechanism for monitoring operational status of remote
Digital and synthesized speech alarm system
Digital longitudinal balance measurement
Digital loop carrier module for proactive maintenance...
Digital signal cross-connection system
Digital signal detector and method
Digital subscriber line access and network testing multiplexer
Digital subscriber line access and network testing multiplexer
Digital telephone overcoming international incompatibilities
Digital telephone station line controller
Digital tone detector
Direct access test unit for central office
Distributor with a test access
Double-ended line probing (DELP) for DSL systems
Drop testing in fiber to the home systems