Data access arrangement
Data access arrangement
Data access arrangement having combined remote hang-up/ring dete
Data access arrangement with telephone interface
Data transmitter-receiver having echo canceler with data delay
DC control circuit
DC holding circuit
DC level control for an electronic telephone line card
DC-supply arrangement for a telecommunication line
DC/DC converter and subscriber line interface circuit
Design of telephone line interface circuits using a two chip...
Detection of low tip/ring currents in a line powered DAA
Device and method for connecting a monitored alarm system to...
Device and method for detecting presence of service on...
Device for connecting a subscriber line to a high frequency...
Device for electrical and/or electronic telephone circuits, desi
Device for establishing a galvanically separate connection...
Device for processing echo, particularly acoustic echo in a tele
Device which reduces central office battery current during...
Dialer circuit