Digital recording of IP based distributed switching platform
Digital recording of IP based distributed switching platform
Digital subscriber line network deployment method
Directory assistance access to intercept telephone numbers
Directory assistance call processing and calling customer remote
Directory assistance dialog with configuration switches to...
Directory assistance dialog with configuration switches to...
Directory assistance dialog with configuration switches to...
Directory assistance dialog with configuration switches to...
Directory assistance method and apparatus
Directory assistance system
Directory assistance system
Directory integration in mobile systems
Directory number portability in telephone networks
Discretionary call forwarding
Display hierarchy of participants during phone call
Disposable telephone numbers
Disposable telephone numbers
Distinctive call waiting alert and management device
Distinctive call waiting based on a redirecting number