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#PhoneExchange

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lpbkdotnet<p><span class="h-card" translate="no"><a href="https://hive.institute/@ety" class="u-url mention">@<span>ety</span></a></span> my shenanigans are mostly on much older kit than your average home lab phone setup (<a href="https://mstdn.social/tags/electromechanical" class="mention hashtag" rel="tag">#<span>electromechanical</span></a> <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a>!)</p><p>My preference for phone kit is “massive, heavy, and maintained with a spanner” 😂</p><p>I just throw a ton of tags at it (usually as many relevant ones as I can fit in the post) <a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/pbx" class="mention hashtag" rel="tag">#<span>pbx</span></a> <a href="https://mstdn.social/tags/vintagePhone" class="mention hashtag" rel="tag">#<span>vintagePhone</span></a> are probably my most commonly used.</p><p>I’ve been hanging out with <span class="h-card" translate="no"><a href="https://tacobelllabs.net/@CuTEL" class="u-url mention">@<span>CuTEL</span></a></span> a bit over the last couple of years, so I also have some more modern <a href="https://mstdn.social/tags/voip" class="mention hashtag" rel="tag">#<span>voip</span></a> &amp; <a href="https://mstdn.social/tags/dect" class="mention hashtag" rel="tag">#<span>dect</span></a></p>
lpbkdotnet<p>Is anyone able to lay their hands on a firmware image for a Samsung Ubigate IBG1004?</p><p>It’s an <a href="https://mstdn.social/tags/isdn" class="mention hashtag" rel="tag">#<span>isdn</span></a> to <a href="https://mstdn.social/tags/sip" class="mention hashtag" rel="tag">#<span>sip</span></a> <a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> gateway, and the one I’ve got seems to be corrupt and won’t decompress.</p><p>My usual haunts for firmware images are coming up blank.</p><p>The filename will be something like `iBG1004_Advanced_1.6.1.9.Z` - but I&#39;m really not too fussy about the version number!</p><p>Please boost if you think you have followers that can help!</p><p><a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/PABX" class="mention hashtag" rel="tag">#<span>PABX</span></a> <a href="https://mstdn.social/tags/PBX" class="mention hashtag" rel="tag">#<span>PBX</span></a> <a href="https://mstdn.social/tags/voip" class="mention hashtag" rel="tag">#<span>voip</span></a></p>
lpbkdotnet<p>Ok <a href="https://mstdn.social/tags/vintageElectronics" class="mention hashtag" rel="tag">#<span>vintageElectronics</span></a> nerds! tell me about these things…</p><p>The “MR” designation denotes some kind of diode (it stands for Metal Rectifier, a notation hangover from before silicon/germanium diodes) and they’re obviously arranged as full bridge rectifiers</p><p>They’re in a PSU made for the British Post Office in 1972</p><p>The brown stripe seems to denote the + end, but what does the other stripe mean?</p><p><a href="https://mstdn.social/tags/Electronics" class="mention hashtag" rel="tag">#<span>Electronics</span></a> <a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/Telephone" class="mention hashtag" rel="tag">#<span>Telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/hamRadio" class="mention hashtag" rel="tag">#<span>hamRadio</span></a> <a href="https://mstdn.social/tags/AmateurRadio" class="mention hashtag" rel="tag">#<span>AmateurRadio</span></a></p>
lpbkdotnet<p>The (extensive) phone system in my house is reachable from the outside world, but I don&#39;t like anyone phoning me overnight.</p><p>So I&#39;ve made all the inbound routes time-of-day aware and they now play this message if you phone them overnight</p><p><a href="https://www.youtube.com/shorts/I0gfkRpPchc" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://www.</span><span class="">youtube.com/shorts/I0gfkRpPchc</span><span class="invisible"></span></a></p><p><a href="https://mstdn.social/tags/asterisk" class="mention hashtag" rel="tag">#<span>asterisk</span></a> <a href="https://mstdn.social/tags/phones" class="mention hashtag" rel="tag">#<span>phones</span></a> <a href="https://mstdn.social/tags/telephones" class="mention hashtag" rel="tag">#<span>telephones</span></a> <a href="https://mstdn.social/tags/voip" class="mention hashtag" rel="tag">#<span>voip</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a></p>
lpbkdotnet<p>The <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> is in the van, and headed to <a href="https://mstdn.social/tags/emfcamp" class="mention hashtag" rel="tag">#<span>emfcamp</span></a> <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a></p>
lpbkdotnet<p>My <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/PhoneExchange" class="mention hashtag" rel="tag">#<span>PhoneExchange</span></a> installation for <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a> is as fully working as it’s going to get… so out come the packing crates!</p><p>I’ve got 48hrs to pack it all up before the van arrives…</p><p>Packing Progress:<br />🟩🟩🟩🟨⬜️⬜️⬜️⬜️⬜️⬜️ 29%</p>
lpbkdotnet<p>I&#39;ve made another video about getting the <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> ready for me to take it to <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a> </p><p>In this episode, I try and get the tie lines working...</p><p><a href="https://youtu.be/tJ9UP861z6E" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="">youtu.be/tJ9UP861z6E</span><span class="invisible"></span></a></p><p>Oh, and what&#39;s that? There&#39;s now a website with more information about the <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> and a blog and everything?</p><p><a href="https://emf.lpbk.net/blog/posts/2024-05-05/" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">emf.lpbk.net/blog/posts/2024-0</span><span class="invisible">5-05/</span></a></p><p>The site is a work in progress, and will change a /lot/ in the run up to the event.</p><p>RSS feeds are on the todo list, but I&#39;ve got a phone exchange to fix first!</p>
lpbkdotnet<p>found an annoying fault on the <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> - see that little pin just hanging out there at a jaunty angle nestled amongst the contact springs?</p><p>It’s a lifting pin for the contacts at the top of the pile, it’s supposed to be straight, and attached to one of the contacts.</p><p>Instead, it’s not lifting anything and is wiggling around connecting things that shouldn’t be connected.</p><p>I guess now I get the fiddly job of replacing the stack of contacts without breaking any 70 year old wires!</p>
lpbkdotnet<p>If I’m going to run a <a href="https://mstdn.social/tags/stowger" class="mention hashtag" rel="tag">#<span>stowger</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> at <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a> I need to be able to connect phones to it…</p><p><a href="https://m.youtube.com/watch?v=xH19vujR4U4" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">m.youtube.com/watch?v=xH19vujR</span><span class="invisible">4U4</span></a></p><p><a href="https://mstdn.social/tags/emf" class="mention hashtag" rel="tag">#<span>emf</span></a> <a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/electroMechanical" class="mention hashtag" rel="tag">#<span>electroMechanical</span></a></p>
lpbkdotnet<p>I’ve now done two of those RJ21s (terminated by hand with a screwdriver) then terminated on the 5 krone strips at the top of this boxconn, then the 4 x RJ45 sockets are terminated on the bottom 2 strips.</p><p>Two of the RJ45s will go to a Cisco 1760 fitted with 4-FXO/4-FXS ports, that will connect to the rest of the phones at <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a> </p><p>The other two RJ45s will go to 8 demo <a href="https://mstdn.social/tags/phones" class="mention hashtag" rel="tag">#<span>phones</span></a> for people to play with!</p><p>One step closer to having the <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> ready to go camping!</p>
lpbkdotnet<p>I’ve decided on my Easter weekend project… I need to swap the position of two <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> cabinets in my shed, so I can set up the one I’m taking to <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="tag">#<span>emf2024</span></a> as though it’s installed on-site</p><p>I’ve measured, it’s possible… but involves moving about 15 heavy crates full of GPO relays, 7U of network equipment, 2 <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> exchanges, an <a href="https://mstdn.social/tags/isdx" class="mention hashtag" rel="tag">#<span>isdx</span></a> PABX, several reels of cable and other miscellaneous stuff I’ve forgotten about!</p><p>Perhaps this needs to be a time lapse video of some kind</p>
lpbkdotnet<p>I haven’t watched it all yet, but here’s some people poking about inside a BT <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> </p><p><a href="https://m.youtube.com/watch?v=kfOzyIib7wU" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">m.youtube.com/watch?v=kfOzyIib</span><span class="invisible">7wU</span></a></p><p><a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> <a href="https://mstdn.social/tags/telecoms" class="mention hashtag" rel="tag">#<span>telecoms</span></a> <a href="https://mstdn.social/tags/telecom" class="mention hashtag" rel="tag">#<span>telecom</span></a> <a href="https://mstdn.social/tags/urbex" class="mention hashtag" rel="tag">#<span>urbex</span></a></p>
lpbkdotnet<p>AC14 (2280Hz) Signalling Demo Progress…</p><p>The wiring between the relaysets is done with the exception of the connections that go to the <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> end, the <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> end, and the 4-wire circuit between the two ends of the link.</p><p>So, 9 wires remaining then I can start powering it up… but first, I need to find a suitable method of terminating those connections that allows me to add in annamplifier/speaker so you can hear the tones.</p><p>It’s back to the sketchbook and eBay searches!</p><p><a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/phreak" class="mention hashtag" rel="tag">#<span>phreak</span></a></p>
lpbkdotnet<p>If you&#39;re interested in this sort of thing (and who wouldn&#39;t be?!)</p><p>The whole notebook full of late 1950s UK telephone routing codes is online as a pdf here: <a href="https://paulseward.com/downloads/Telephony_Phreaking_Archive/TLA-FDY-TKZ.pdf" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">paulseward.com/downloads/Telep</span><span class="invisible">hony_Phreaking_Archive/TLA-FDY-TKZ.pdf</span></a></p><p>An OCR version will follow at some point in the handwavy future when I get around to it (if I don&#39;t forget).</p><p><a href="https://mstdn.social/tags/phreaking" class="mention hashtag" rel="tag">#<span>phreaking</span></a> <a href="https://mstdn.social/tags/preak" class="mention hashtag" rel="tag">#<span>preak</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/telecom" class="mention hashtag" rel="tag">#<span>telecom</span></a> <a href="https://mstdn.social/tags/telecoms" class="mention hashtag" rel="tag">#<span>telecoms</span></a> <a href="https://mstdn.social/tags/telecomHistory" class="mention hashtag" rel="tag">#<span>telecomHistory</span></a> <a href="https://mstdn.social/tags/telecomsHistory" class="mention hashtag" rel="tag">#<span>telecomsHistory</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a></p>
lpbkdotnet<p>I love the product names in this extract from Telephone Rentals document &quot;EP2/4055 - S50 - FACILITIES, DICTATION RECORDING&quot; (30th Nov 1964)</p><p>It lists approved suppliers of centralised recording equipment, to be connected to their internal telephone systems</p><p>Centralising the recording equipment was much cheaper than duplicating it for each exec.</p><p>A central typing pool would retrieve the recordings, type them up and send them out</p><p><a href="https://mstdn.social/tags/telephoneHistory" class="mention hashtag" rel="tag">#<span>telephoneHistory</span></a> <a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/telecoms" class="mention hashtag" rel="tag">#<span>telecoms</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a></p>
lpbkdotnet<p>Oh yeah! I was posting Christmas telephone stuff this month wasn&#39;t I..</p><p>On Friday I mentioned that The Hull Corporation telephone company launched their Santa service.</p><p>Well, here are three examples of the recorded messages that kids could dial up and listen to:</p><p><a href="https://www.youtube.com/watch?v=rI4Gt5YKAWs" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://www.</span><span class="">youtube.com/watch?v=rI4Gt5YKAWs</span><span class="invisible"></span></a></p><p><a href="https://www.youtube.com/watch?v=zvpTfQCNP7o" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://www.</span><span class="">youtube.com/watch?v=zvpTfQCNP7o</span><span class="invisible"></span></a></p><p><a href="https://www.youtube.com/watch?v=wBEmAsACQc4" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://www.</span><span class="">youtube.com/watch?v=wBEmAsACQc4</span><span class="invisible"></span></a></p><p><a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/telephoneHistory" class="mention hashtag" rel="tag">#<span>telephoneHistory</span></a> <a href="https://mstdn.social/tags/telecom" class="mention hashtag" rel="tag">#<span>telecom</span></a> <a href="https://mstdn.social/tags/telecoms" class="mention hashtag" rel="tag">#<span>telecoms</span></a> <a href="https://mstdn.social/tags/telecomHistory" class="mention hashtag" rel="tag">#<span>telecomHistory</span></a> <a href="https://mstdn.social/tags/TelephoneHistory" class="mention hashtag" rel="tag">#<span>TelephoneHistory</span></a> <a href="https://mstdn.social/tags/vintagePhone" class="mention hashtag" rel="tag">#<span>vintagePhone</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="tag">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/Hull" class="mention hashtag" rel="tag">#<span>Hull</span></a> <a href="https://mstdn.social/tags/kcom" class="mention hashtag" rel="tag">#<span>kcom</span></a></p>
lpbkdotnet<p>Christmas at Haywards Heath Telephone exchange 1953</p><p>Lots of paper garlands and decorations adorning the CB10 switchboard here, but if you look closely there are paper santas/elves hanging from the cable turning sections where the positions wrap around the corners of the room.</p><p>Thanks to Stefan on the &quot;UK Switchboards&quot; facebook group for finding it.</p><p><a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> <a href="https://mstdn.social/tags/PhoneExchange" class="mention hashtag" rel="tag">#<span>PhoneExchange</span></a> <a href="https://mstdn.social/tags/TelecomsHistory" class="mention hashtag" rel="tag">#<span>TelecomsHistory</span></a> <a href="https://mstdn.social/tags/telecomHistory" class="mention hashtag" rel="tag">#<span>telecomHistory</span></a> <a href="https://mstdn.social/tags/switchboard" class="mention hashtag" rel="tag">#<span>switchboard</span></a> <a href="https://mstdn.social/tags/operator" class="mention hashtag" rel="tag">#<span>operator</span></a></p>
lpbkdotnet<p>Test shot for a video I’m planning at the moment. I thought it was too pretty to keep to myself… so it’s here with no context 😀</p><p><a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/Strowger" class="mention hashtag" rel="tag">#<span>Strowger</span></a> <a href="https://mstdn.social/tags/PhoneExchange" class="mention hashtag" rel="tag">#<span>PhoneExchange</span></a> <a href="https://mstdn.social/tags/relay" class="mention hashtag" rel="tag">#<span>relay</span></a> <a href="https://mstdn.social/tags/Telecoms" class="mention hashtag" rel="tag">#<span>Telecoms</span></a> <a href="https://mstdn.social/tags/TelecomHistory" class="mention hashtag" rel="tag">#<span>TelecomHistory</span></a></p>
lpbkdotnet<p>Now that Lil is allowed outside, she’s discovered my workbench in the <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="tag">#<span>telephoneExchange</span></a> <a href="https://mstdn.social/tags/shed" class="mention hashtag" rel="tag">#<span>shed</span></a> - so I gave in and put a blanket down for her.</p><p>All projects will now include 100% more kitty, and I have to be that bit more mindful when I’m closing up for the day</p><p><a href="https://mstdn.social/tags/CatsOfMastodon" class="mention hashtag" rel="tag">#<span>CatsOfMastodon</span></a> <a href="https://mstdn.social/tags/hamShack" class="mention hashtag" rel="tag">#<span>hamShack</span></a> <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="tag">#<span>strowger</span></a> <a href="https://mstdn.social/tags/PhoneExchange" class="mention hashtag" rel="tag">#<span>PhoneExchange</span></a></p>
lpbkdotnet<p>Got some dirty <a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="tag">#<span>telephone</span></a> <a href="https://mstdn.social/tags/switchboard" class="mention hashtag" rel="tag">#<span>switchboard</span></a> plugs you need to clean up? You need a Bell System Plug Polisher 497A!</p><p><a href="https://m.youtube.com/watch?v=PtGYEqkrYxw" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">m.youtube.com/watch?v=PtGYEqkr</span><span class="invisible">Yxw</span></a></p><p>I don’t think we had an equivalent in the UK, but now I really want one!</p><p><a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="tag">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/PhoneExchange" class="mention hashtag" rel="tag">#<span>PhoneExchange</span></a> <a href="https://mstdn.social/tags/TelecomHistory" class="mention hashtag" rel="tag">#<span>TelecomHistory</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="tag">#<span>phone</span></a></p>