61 lines
3.3 KiB
Plaintext
61 lines
3.3 KiB
Plaintext
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Project Verify
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by Fred Steinbeck
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I did some more research, and found that RING FWD doesn't send 90V out on the
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forward part of the loop. Instead, it disconnects the forward part of the loop
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from the position for a short period of time (less than 0.5 seconds). On an
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overseas call, this would make the inward operator's CLG light flash on and off,
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signaling her to stop doing her nails and get on with the call.
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What this does to verify circuitry is anyone's guess. If the connection is
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long distance, the winking of the TSPS console would send 2600 Hz momentarily at
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the verify circuitry, which might be a possibility...
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Anyway, operators generally don't use routing codes anymore, except in a few
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areas (I wish I knew of a few of them). Now what an operator does to verify or
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interrupt is the following:
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Assume you have dialed 0+7D, and the 7D is the number you want verified. The
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operator then classes charge as "station paid" and hits VFY. If VFY lights, it
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means the number can be verified. She then presses HOLD on loop 1, and ACS
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(access) on loop 2. She then presses ST, which completes the verify call. If
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there is speech on the line, she will hear encrypted speech. Assuming so, she
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then hits EMER INT (emergency interrupt), tells them what's going on, and then
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hits REL FWD (release forward, which drops the call on loop 2). She then hits
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POS REL on loop 2, and ACS on loop 1, bringing her back to you. She then
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reports, hits REC MSG (record message, which charges you) and then POS REL,
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position release.
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Most areas no longer have "TSPS Maintenance Engineers" or frame calling the
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operator. However, if you do, you might waht to try this. "Operator, class
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charge as station paid, and hit verify plus start. Now hit emergency interrupt,
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no AMA, and postion release." This should have the effect of throwing you into
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the call as a 3rd party, for free. I wouldn't do this from home, however,
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because when you call the operator, you are not free of her until she position
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releases. Therefore, if she gets suspicious, you can hang up, but it won't do
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you any good...
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Paraphernalia
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B & F Enterprises (P.O. Box 3357, Peabody, MA 01960), says Agent NDS, sells a
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"telephone loop pickup coil", for $4.88. I would assume it is much like the
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Trinetics PC-48 inductive coupler. I have not checked this place out, but it
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would seem to be a good deal.
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Bay Technologies-(408)-737-8180 sells the NSC 800 series of microprocessors
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and support devices. To find a supplier closer to you, try calling National
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Semiconductor at (408)- 737-5000, and ask for your local distributor.
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American Microsystems, Inc. (AMI) produces what they call the
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"Telecommunications Design Manual". This fine book, which is actually a
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combination of AMI semiconductors, circuit layouts, schematics, articles, and an
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informative glossary, can be had for the price of a call to (408)-246-0330.
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Bell System locks are a special brand: BEST. They are what they claim to be.
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I have never met a person who could pick them. What to do? Take a hacksaw to
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the lock from the top and cut the doorknob off. Then throw the bolt with a
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screwdriver. It takes about 20 minutes, but it can be worth it.
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Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open
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