H - Electricity – 04 – B
Patent
H - Electricity
04
B
379/2
H04B 3/46 (2006.01) H04M 1/24 (2006.01) H04M 3/30 (2006.01)
Patent
CA 1106986
TELEPHONE INSTRUMENT CONNECTION BLOCK WITH REMOTELY ACTUATED LINE TEST Abstract of the Disclosure A remotely actuated line testing connection block with modular jack is disclosed for installation and use to connect directly to a subscriber's telephone instru- ment. The block is connected to the incoming tip and ring wires of the line and to ground and provides tests which closely emulate those performed by a field repair- man. When a test voltage of a first polarity from a cen- tral office is applied across one of the tip and ring wires and ground, a capacitor is charged. Upon release of the test voltage, the capacitor actuates a first switch which shorts the tip and ring wires together and may also ground them if a ground test option is selected. The capacitor also activates a second switch which dis- connects the user's instrument. The first switch re- leases after about half of a test interval with the second switch releasing at the end thereof to restore normal line connections. In addition to, or in lieu of the first and second switches, the test block may include a test signal generator driven by a second capacitor charged from a test voltage of reversed polarity.
318862
Fields Gary C.
Smart & Biggar
LandOfFree
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