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News & Notices F.A.Q. Central Station Info
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TM 10/26/2000 (Refer to our Warning on the front page.)DSL (Direct Subscriber Line) Update:Two top representatives of SBC met with Alarm Dealers of the Pennsylvania Burglar & Fire Alarm Association to discuss SBC's entry into the local telephone service market and answer technical questions. A foremost issue was DSL compatibility with conventional digital dialers that are used in the vast majority of alarm systems. |
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Compatibility is by no means a sure thing, but their advice was to make sure you get the correct one of two kinds of filtering. One choice is to put a microfilter device at each instrument or piece of equipment that needs plain old telephone service ("POTS"). The other is to install a single "POTS Splitter" box near the network interface, then distribute DSL out one branch circuit and plain telephone service out a separate branch circuit as needed. There is a good article explaining this service, with diagrams showing the wiring differences between the two types of filters, in the November 21, 2000 edition of PC Magazine ( www.pcmag.com), page 107.
If you have an alarm dialer that must be connected to your DSL line, the single filter box is the preferred way to go, because it can accommodate a vital function called Line Seizure.
The RX31X jack for your alarm system goes on the POTS branch between the POTS Splitter and all POTS-using devices.
Make sure none of those microfilters sneak into your system on the DSL branch later on, because they will defeat line seizure with respect to the new telephone device.
Don't connect any new POTS-using devices on the POTS branch ahead of the RJ31X Jack.
Update 2006: A special DSL alarm filter has been on the market for a number of years. It's different from a regular voice or data microfilter in several ways. It has an 8-pin plug and a socket. It goes in line with the RJ31X cord. The RJ31X Jack still has to be first in line and wired as usual. It allows the voice channel to go through the alarm panel as usual but shunts the data around the alarm panel. You can then use voice and data microfilters as needed anywhere downstream in the phone distribution system. It sells for $35-$50. Ask for a current price. We can mail it to you for a flat $10 shipping/handling fee or we can make a service visit to our subscribers' premises to install it. If you order DSL, you should get this filter in advance and put it in before DSL is activated. If you later discontinue DSL, this filter won't hurt anything if left in place.
Burglar Caught in the Act
If you wonder why you need a motion detector:
DC Metropolitan Police charged a 35-year-old man with second-degree burglary after a failed break-in left him stuck in a ventilation duct for several hours on Wednesday, according to the Washington Post. The man was in critical condition at Washington Hospital Center after surgery, a hospital spokesman said. He suffered breathing problems, loss of circulation and exposure. DC Fire spokesman Alan Etter said the man was found shortly before noon in a grease duct at the U-Like Carryout. Restaurant workers heard the man screaming and called for help. It took firefighters more than an hour to remove the man from the duct, where he was upside down and covered in grease, Etter said. -NBFAA Member Update Newsletter, 9/28/2001.
Site News
12/3/2003
I added our Company Brochure and a couple of newsletters to the Newsletter list. They are in PDF format.
8/2006
I added Barbara's promotional letter for Ovarian Cancer Awareness; updated yard sale items
Some of the more permanent articles from our past newsletters are adapted and accessed through other pages on this site.
Stop back again. This site is still under construction. There are many items I want to post, and I'll be writing new ones, God willing. - Lou