Line powered modem automatic answer device powered from equipmen

Details Line powered modem automatic answer device powered from equipmen Line powered modem automatic answer device powered from equipmen

1981-11-25

1983-11-15

Rubinson, G. Z.

H04M 1100

Patent

active

044157746

ABSTRACT:
An automatic answering device controlled by attached data equipment and used with a modem powered from the telephone line. The modem and automatic answering device are automatically connected to and subsequently powered by the telephone line when a ring signal has occurred on the telephone line and the data equipment has indicated that it is ready to receive data. The energy needed to connect the modem to the telephone line is slowly accumulated from a data equipment over a period of time prior to the connection of the modem to the telephone line. The modem automatically hangs up when the local data equipment signals disconnect or the modem at the other end of the telephone line disconnects.

REFERENCES:
patent: 4306116 (1981-12-01), McClure et al.
patent: 4366347 (1982-12-01), Takatsuki et al.
patent: 4373117 (1983-02-01), Pierce

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