Title: Malfunction detection and changeover apparatus for data communications system

Abstract: A data terminal is connected to a telephone line for data transmission and reception. When a malfunction is detected in the data terminal, the data terminal is automatically disconnected from the telephone line and a telephone set connected to the telephone line. After a predetermined time interval, the telephone set is automatically disconnected from the telephone line and the data terminal re-connected to the telephone line.

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Inventors: Hashimoto, Takemi (Tokyo, JA)

Application Number: 518825
Filing Date: 1974-10-29
Publication_date: 1976-06-08
Assignee: Ricoh Co., Ltd. (Tokyo, JA)
Primary Class(es): 379/28 379/93.01
Other Classes:
US Patent Ref:

2828362	Mar, 1958	Darwin et al.	179/2.
3475557	Oct, 1969	Morse et al.	179/2.
3524935	Aug, 1970	Gonsewski	179/2.
3739338	Jun, 1973	Jacobson et al.	179/2.
3787623	Jan, 1974	Stephenson	179/2.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Stellar, George G.
Attorney: Jordan; Frank J.