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

Transient signal elimination circuit for telecommunications appl

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

Transient signal elimination circuit for telecommunications appl

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

Two way telephone communication system

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

Two-way voice communication methods and apparatus

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

Two-wire telecommunications line detection arrangements

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

Two-wire telecommunications line detection arrangements

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

User programmable station set bass and treble control

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

Voice activity detection system and method

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

Voice activity detector for half-duplex audio communication syst

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

Voice activity detector for half-duplex audio communication syst

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

Voice direction recognition in a digital telephone station

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

Voice messaging system caller ring bypass control

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

Voice operated switch

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

Voice switch used in hands-free communications system

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

Voice transmission systems with voice cancellation

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

Voice-switched handset receive amplifier

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

Zero crossing detection circuit