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

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

Three relay C. O. trunk interface

Telephonic communications – Supervisory or control line signaling – Substation originated

Toll call telephone service center

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

Tone based answer detection for IP based telephones

Telephonic communications – Supervisory or control line signaling – Substation originated

Tone burst generator and its application to telephony

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detection

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detection

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detection process and device for implementing said process

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detector

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detector judging a detection of a predetermined tone...

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone detector with improved performance in the presence of speec

Telephonic communications – Supervisory or control line signaling – Substation originated

Tone generator device for driving light emitting elements

Telephonic communications – Supervisory or control line signaling – Substation originated

Tone generator for electronic exchange

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone receiver comprising a switch capacitor zero crossing detect

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone, modulated tone, and saturated tone detection in a...

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone-detection method for detecting at least one tone in a dual-

Telephonic communications – Supervisory or control line signaling – Signal receiver

Tone-type recognition method

Telephonic communications – Supervisory or control line signaling – Substation originated

Touch screen form entry system

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

Toy type children telephone set

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

Transient signal elimination circuit for telecommunications appl