Telephone network speech signal enhancement
Telephone NID isolation module
Telephone power distribution and isolation system
Telephone set
Telephone subscriber circuit
Telephone subscriber line module
Telephone-coupled device for internet access
Terminal for telegraph and telephone systems
Termination block
Trunk interface circuit having function of battery feed to centr
Two-input crosstalk-resistant adaptive noise canceller
Two-line subscriber system
Unsplit bipolar pulse forming line
Variable block size adaptation algorithm for noise-robust acoust
Variable DC feed characteristic in a subscriber line interface c
VDSL splitter
Voice conference system using echo cancellers
Voltage regulator control circuit for a subscriber line interfac
XDSL splitter assembly for main distribution frame
XDSL splitter line module for network interface device