LandOfFree - US Patents - Listing for Telephonic communications,Supervisory or control line signaling,Using line or loop condition detection

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for automatic generation of telephone call

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for detecting multiple telephone...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for determining when a telephone handset is

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for non-disruptive telecommunication...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for non-disruptive telecommunication...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for off-hook detection

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for ring again feature for a telephone...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for sensing current

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and apparatus for switch hook detection

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and arrangement for filtering of signals

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and circuit for failsafe switch-hook detection during fau

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and device for detecting a ringtrip

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and modem circuit for determining connection status...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and system for line status indicators using line side...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method and telecommunications center for recognizing...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method for activating a lamp on analog customer premises equipme

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method for automatic speech direction reversal, and circuit conf

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method for automatically switching telephone system to an...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Method for determining telephone dial pulse parameters independe