Facsimile apparatus for determining communication failure

Details Facsimile apparatus for determining communication failure Facsimile apparatus for determining communication failure

1991-11-21

1994-06-14

Kuntz, Curtis

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

358434, 358436, 358441, 379 96, H04M 1100, H04N 142

Patent

active

053217411

ABSTRACT:
An automatic dial device transmits a dial signal to a telephone line. A facsimile signal receiver serves to receive a response facsimile signal from the telephone line. An image signal is transmitted from an image data store unit to the telephone line in cases where the facsimile signal receiver receives a response facsimile signal during a predetermined period after the automatic dial device transmits a dial signal. The telephone line is opened in cases where a busy signal is detected by a busy signal detector during the predetermined period after the automatic dial device transmits a dial signal. The telephone line is opened in cases where the busy signal detector continues to not detect a busy signal during the predetermined period after the automatic dial device transmits a dial signal. A communication failure is indicated in cases where the busy signal detector continues to not detect a busy signal during the predetermined period after the automatic dial device transmits a dial signal.

REFERENCES:
patent: 4741021 (1988-04-01), Kotani et al.
patent: 4920560 (1990-04-01), Kageyama

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