From FB group Bell Telephone … I agree. The upside of splitting before is that it won’t interrupt the DSL. The downside is that if there is a failure (loss of continuity or blown fuse) in the splitter, the alarm may never make a call. Most of the alarm panels we had at the college
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This is a link to telecomm information on Tomi Engdahl’s epanorama.net. http://www.epanorama.net/circuits/teleinterface.html#hybrid
From FB group Bell Telephone of the… It’s possible [to stop telemarketing calls]. There are some gotchas, though. One I see is a nonselective rejection of unknown incoming calls is the emergency services, etc., wouldn’t be able to contact you. If the school had a threat and had to call parents, they would be blocked.
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This number was most likely from the time when the 714 area code covered the area outside of LA, including all of Southern California San Diego county and east, Riverside County, San Bernardino County, and the east side of the Sierras all the way up to Inyo. I remember that no prefix in Orange County
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This Western Electric 550 or 555 manual switchboard was used in the OUSD Administrative HQ when it was in the old bldg on Glassell that is now the Chapman University College of Law. It was rescued from the dump. I hope to find a new local home for it where it can be seen by
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We were discussing gong type telephone bells on FB group Bell Telephone… Back maybe ten years ago I snagged an AT&T bell out of a bldg before the bldg was remodeled. It was a bell without an enclosure, the two bells were exposed, with the clapper between them. It connected directly to the incoming line
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From FB group Bell Telephone Ohhhhh, Ed Vaughn, you gave me a big headache. Those message waiting lights… We had a 1200 baud MW line directly from the CO to our PBXes, and one PBX then distributed it to dozens of others in the district over the network, not by ethernet, but by XNS over
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From FB group Bell Telephone… In the days of analog phones like 500s and 2500s, Ma Bell had the phone matched to the line, so whatever the line length was, it compensated and the signal levels were very uniform, it worked great. Then came along the full duplex digital system, and everything went to hell.
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From FB group Bell Telephone… a reply to Lucky225 I fixed the same problem. A single 1N4003 rectifier diode in series with the LED. If you think there’s too much flicker, add a 220 uF capacitor across the LED. The LED must have a resistor in series, start with 1000 ohms (brown, black, red, gold
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