Patent
Control unit for a time-division telecommunications exchange
Reads0
Chats0
TLDR
In this article, the control units are microprogrammed machines under the control of a "macroprogram" assembled using the conventional computer techniques, and are connected to a data processing center via a monitoring unit.Abstract:
In an existing time division exchange system the known switching network and connection units are retained, but the control of these units is taken over by a pair of new control units which replace a collection of previous units such as multi-registers, markers, translators, call charging devices etc. The new control units each comprise a multi-register portion and a dialogue portion with the multi-register portion governing the setting up and the clearing down of traffic while the dialogue portion performs most of the communication between the multi-register portion and the rest of the exchange equipment. The control units are microprogrammed machines under the control of a "macroprogram" assembled using the conventional computer techniques. The control units are connected to a data processing center via a monitoring unit.read more
Citations
More filters
Patent
Automated system for establishing telephone voice connections
Abstract: A computer inputed with a data base of potential call recipients and having an EIA RS-232 Data Communication Equipment interface drives an auto-call unit or dialer through a format conversion device to be compatible with the dialer EIA RS-366 automatic calling equipment interface. A line signalling device monitors the dial stream for conference connection commands and establishes a voice connection between the computer, an external or remote station and an internal or local extension upon receipt of such command. The computer thereupon disengages itself from the conference connection while maintaining the same between the remote and local stations. While a previously established conference connection may continue to be in progress, the computer is free to process a new sequence of dial digits from the data base to establish a conference connection between a next successive group of handsets in an automated, high speed repetitive manner.
Patent
Digital signal subscriber loop and interface circuit
TL;DR: In this paper, a TDM PCM telephone system and a telephone user terminal are interconnected by a digital subscriber loop circuit which provides at least a single channel communication path for digital signals of data or encoded voice origin.
Patent
PBX telephone system I/O interface
TL;DR: In this article, an approach for converting serial bit digital signals of selected line rate from a plurality of sources into a single serial bit signal for time division multiplexing (TDM) in periodic frames by a central receiver is described.
Patent
Call processor for a satellite communications controller
TL;DR: In this article, a call processor is disclosed for a satellite communications controller, having a plurality of M voice ports, with an E lead input and an M lead output connected to each of a first subplurality of voice ports for rotary dial telephones.
Patent
Modulator-demodulator apparatus and system
TL;DR: In this article, a modulator-demodulator (MODEM) is presented, which includes a register for accepting macro-instruction from an external source, a circuit for interpreting and executing the macro-instructions, and a circuit that outputs a response to the macro instructions.
References
More filters
Patent
Program controlled time division switching systems
TL;DR: In this article, a PBX is described in which each call is associated with a unique time slot as well as a unique frame, and the system closes the line switches involved on a call during each occurrence of its associated time slot and it processes information for a call only during every occurrence of the associated time frame.