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Class 379/186 - Central power source


Subclass of Class 379 - Telephonic communications
Definition: Subject matter having a common electrical energizing supply
No. of patents: 5
Last issue date: 05/15/2007


NumberTitleIssue Date
7218718Method to perform a telecommunication with dialing destination preview
The present invention concerns a method to perform a telecommunication between a caller terminal and a callee terminal identified by an identification code, such as a phone number. Method wherein it comprises the steps of: collecting routing information relat...
05/15/2007
7184538Method of and apparatus for mediating common channel signaling message between networks using control message templates
A communication network includes a Security Gatekeeper that authenticates and validates network control messages within, transiting, entering and leaving an overlying control fabric such as an SS7 network. The Security Gatekeeper incorporates several levels of check...
02/27/2007
6208714Telephone answering apparatus for indicating the presence of a power cycle
A telephone answering apparatus for indicating the presence of a power-cycle includes a memory device which stores a retrieved message and a value from a clock, and a controller operatively connected to the memory device and to the clock. The controller i...
03/27/2001
5781622Two-line apparatus for telephone intercom
An apparatus for providing an intercom function on a telephone, without the need for an external power supply, having DTMF or pulse capabilities including an intercom operation device arranged for connection to a DTMF or pulse telephone line and to a DTMF...
07/14/1998
4258230Party line telephone system
A party line telephone system capable of effecting selective calling from one station to another and particularly adapted for use in battery-powered two-wire telephone systems such as those used in underground mines where consideration of intrinsic safety...
03/24/1981
 
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