Trunk coupling unit
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United States of America Patent
Stats
-
Sep 29, 1987
Grant Date -
N/A
app pub date -
Aug 1, 1986
filing date -
Aug 21, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A relay circuit comprise first and second relays having respective terminals at which positive cross-talk of a signal of positive polarity is produced when the other terminals to which the positive polarity signal is applied are in the make and break states, respectively, and third and fourth relays having respective terminals at which negative cross-talk of a signal of negative polarity is produced when the other terminals to which the negative polarity signal is applied are in the make and break states, respectively, wherein with regards to the terminals where the cross-talk occurs, the first and fourth relays are connected to each other and said second and third relays are connected to each other, respectively.
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