90 volts was for telco pussies. Real alarm systems used 120VAC for ringing voltage. But it was the 130VDC that would get your attention.
By the way, that tended to minimize bad connections. :-)
- badenov
Law Suit in NJ
Nov 09, 2006
25 Replies
Stand By- Ken is reviewing the Case.
No, just wake up the technician.
Funny but on those systems the "control" was actually at the central station, not at the customer end. At the customer end there were very small boxes, that had no keypad or key switch. Just a knob that said day and night with a ring back button. Most of those I saw were old enough that the original installer rode a horse to over to do the installation. The idea was a current matching device like on movies showing ships from World War I where you have stop, full speed, half speed and such matching the pilot house to engine room. So like the ship if the customer was in day, central in went to day and vice versa, just like the ship.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required