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technotite last won the day on January 21 2019

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About technotite

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    Will I break 10 posts?

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    Obscure and oddly specific old technology. Screwing around with anything that electrons pass through.
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  1. I've worked on this project for quite a while, and have discussed it on the conference, but have never officially posted recordings on here. There is a large presence of analog and electromechanical switches still in service in the former Soviet countries. The following are 3 recordings of me successfully boxing some of these switches: East Ukraine, ATSK Crossbar Using SF (in-band 2600 dial pulse) Signaling -- seizing and SFing another number: West Russia, Crossbar Using SF (in-band 2600 dial pulse) Signaling -- seizing and SFing another number: East Ukraine, Crossbar Using R1.5 (weird bi-directional MF protocol using R1 tones, used in CIS countries) - seizing and MFing another number:
  2. We know that in Russia and the former soviet states -- there's much more to be had than CCITT5 still. Me and one or two of the other BinRev people have located about a dozen or so (still finding new ones) switches in that area that still use in-band 2600 signaling -- even more surprisingly, these switches use 2600 SF/Dial Pulse signaling rather than MF! 2 of said switches we've managed to find out a way to reliably bluebox/SF-box -- and there's one that is still a work in progress, and it is yet to be determined whether it's SFable or not.
  3. With regards to the test number -- if it goes to that solid tone regardless of routing -- every time -- it might be certainly something to look in to. The 'charge tones' are fax machine answer tones. It does have to do with supervision, in that -- if those two beeps are heard, the fax machine has gone off hook and the call is now supervised. If the receiving fax machine doesn't hear a 1100 hz CNG tone, it will treat the call as non-fax, and the phone will start ringing. With the metallic clanks, they sound potentially like they might be coming from the subscriber-end when they picked up the fax machine handset. On the AIS recording -- it may very well be routing, as VOIP is all over the map on that front. Also, it did sound potentially like you may have been recording with a microphone. While not awful, i'd definitely recommend using some software. Audacity is great, it's free, and it supports recording your audio output natively (might be driver based? -- don't think so, though).
  4. Here's the complete collection of recordings I grabbed of the Odessa 1AESS switch before the cutover. The recordings were made during late may, with the last batch (A-D recordings) made on June 2, 2017 -- days before the cutover. The most interesting recordings I found during the calls to the switch: 1AESS-A.wav - Highest quality recording/best example I have of what a normal call to the 1AESS intercept sounded like. Allows you to hear the background SIT-tone noise before recordings. 1AESS-D.wav - Highest quality recording/best example I have of what a normal call to the 1AESS supervision test sounded like. 1AESS-3.wav - Bizarre because the switch cut to busy after intercept, instead of cutting over to reorder like normal. 1AESS-11.wav - Bizarre because the call, without ring, goes to the 1AESS intercept recording for one cycle, then stops for 20 seconds, and returns the Hillsboro 4ESS '121-T!' recording. 1AESS-14.wav - Bizarre because the call, rings once, goes silent for 30 seconds, then returns the Hillsboro 4ESS '121-T!' recording. 1AESS-15.wav - Bizarre because the call, rings once, goes silent for 40 seconds, then returns a reorder. More descriptions on the other calls are available on the 1A_desc.txt file on the dropbox drive. Enjoy.
  5. Odessa has been converted over. I grabbed about 5 recordings from a faxmodem on the 1st before it was switched. I'll try to post them whenever I have the time.
  6. Sampled the two numbers @ 8181 and 8180 and made recordings.