Door answering system

Details Door answering system Door answering system

1990-10-24

1992-09-15

Schreyer, Stafford D.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 67, 379167, 379176, H04M 902, H04M 1100

Patent

active

051484684

ABSTRACT:
A door answering system is described for enabling the occupant of a structure (e.g., house, apartment, etc.) to provide a pre-recorded message to a visitor who has approached the entrance of the structure. The system includes a speaker/microphone and a call switch at the entrance for the visitor. Inside the structure there is a recorder/player for playing a pre-recorded message and recording a message left by the visitor.

REFERENCES:
patent: 4631365 (1986-12-01), Potter et al.
patent: 4809320 (1989-02-01), Hawkins et al.

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