LandOfFree - US Patents - Listing for Telephonic communications,Supervisory or control line signaling

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringer for satellite user terminals

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringer unit driving system in a subscriber transmission system

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing application circuit

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing detection circuit

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing scheduling for FXS ports on platforms with limited...

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing signal reformatting circuit

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing tone apparatus

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing tone signal detecting circuit

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Ringing-tone control device for telephone set, using audio...

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

Ringtrip judging circuit

Telephonic communications – Supervisory or control line signaling – Signal receiver

Robust signaling tone frequency measurement

Telephonic communications – Supervisory or control line signaling – Signal receiver

Rotary dial pulse receiver