Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of network terminating interface – subscriber trunk...
Patent
1993-09-10
1995-05-23
Chin, Stephen
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of network terminating interface, subscriber trunk...
379399, 327484, H04M 124, H01L 2706, H03K 1774
Patent
active
054188342
ABSTRACT:
This invention describes a maintenance termination unit often used in telephone lines and particularly the triggering circuit for use in such units. The triggering circuit uses two complementary transistors Q1, Q2 and a diode Z1 along with a resistor R and capacitor C2 in specific electrical connection sequence to provide for "turn-on" by either reaching the preset "turn on" voltage or by having a significantly high rate of voltage rise.
REFERENCES:
patent: 4041332 (1977-08-01), Ohhinata
patent: 4396809 (1983-08-01), Brunssen
patent: 4653084 (1987-03-01), Ahuja
patent: 4700380 (1987-10-01), Ahuja
patent: 4710949 (1987-12-01), Ahuja
patent: 5146384 (1992-09-01), Morkovic et al.
patent: 5175662 (1992-12-01), DeBalko et al.
Byatt Stephen W.
Maytum Michael J.
Baumann Russell E.
Chin Stephen
Donaldson Richard L.
Grossman Rene E.
Kim Kevin
LandOfFree
Maintenance termination units does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Maintenance termination units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Maintenance termination units will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2146286