# US 4,396,802 A · Aswixs remote speaker and handset set

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,396,802 A
- Document ID: US4396802A
- Status: Granted
- Kind: A
- Application number: 06/267,937
- Filed: 1981-05-28
- Granted: 1983-08-02
- Earliest claimed: 1981-05-28
- Assignees: The United States of America as represented by the Secretary of the Navy
- Inventors: Dennis P. Hurst
- Web page: https://patentgrep.com/patent/US4396802A

## CPC

- H04M 9/08: Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

A remote speaker and handset unit is interfaced with a satellite communicons system and a number of common users. A vocoder is interposed between each unit and the communications system to enable a real-time voice modulation-demodulation with suitable encryption. Means are provided for permitting a user to listen over a loudspeaker and to interrupt the loudspeaker with the handset when it is desired to transmit a transmission.

## Claims

### Claim 1

In a communication system having a number of users each connected through a vocoder an improvement therefor is provided comprising:
a speaker for audioly broadcasting the communications of the system;
a keyed handset having an earphone and a microphone for providing a restricted listening to the communications of the system and for entering audio communications into the system;
a push-to-talk switch connected to a first solenoid switch electrically coupled to the speaker and to a second solenoid switch electrically coupled to the keyed handset for selectively decoupling the speaker from the system and for selectively coupling the keyed handset having an earphone and a microphone into the system when the speaker is decoupled and vice versa and
at least one suitably connected pin header for interfacing the speaker, the keyed handset and the push-to-talk switch.