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

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

Ringer circuit

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

Ringer circuit for generating sine wave

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

Ringer circuit, particularly for a telephone set

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

Telephonic communications – Supervisory or control line signaling – Substation originated

Saturating bipolar switch circuit for telephone dial pulsing

Telephonic communications – Supervisory or control line signaling – Substation originated

Security code selector for telephone access card

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

Selective ringing receiving device and method

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

Selective telephone ringing-signal interruption