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- Опубліковано 4 лют 2019
- What's inside the Ericsson / LG IPECS PABX left behind in Dave's new lab. Along with a Jabra Bluetooth headset
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More info on the Jabra device fitted over the phone. The thing that slides up and down is a mic to detect when the phone rings. It signals the headset to beep in your ear if you're away from the phone. You tap a button on your headset and the arm, as others have pointed out, lifts the handset to connect to call. The plus and minus adjust the lift height of the handset, some phones might only need a few millimeters or it can lift several centimeters.
Jabra headsets: they are NOT bluetooth. They are DECT if I recall correctly. Range is way over 100m on a good day. Also the "charging" station is the base station, its not just for charging.
Yeah the datasheet said DECT as well
Yes, I have one of those in the office. And the mode dial is not for channels, but for different phone interface modes, the motor switch being one of them.
100% DECT & very good. I have a couple of them & can walk down the street & round the block on the phone. Awesome little bits of kit & great value for money!
Great headsets. Definitely DECT.
The flippy doo-dad is a terrible cludge. There are usually adapter cables for common phone models.
The Left and Right connectors are used to chain an Expansion Key
Service Unit (EKSU) to a Key Service Unit (KSU).
The jabra component on the phone is known as a handset lifter, it lifts the handset to make it off hook vs on hook.
Yeah and it has a little mic to listen to the speaker so when the phone rings it can beep in your head set if your away from your desk. (I think)
This. Lifters are used for phones which don't have a suitable headset interface, usually when the headset you want to use doesn't support whatever random phone you have.
I work at a telecom, watching this tear down of the jabbra headset is hard to watch. The spinner switch isn’t a channel select, it’s a mode select for phone type, it tells the jabbra which wire in the headset in/out ports are audio out vs mic in. There are also several different hookswitch cables you can get to make it integrate with Cisco or Polycom Phones.
That unit was probably worth at a minimum 100, and is likely still a current model and will sell on ebay fairly well.
Oh yeah, export restricted VOIP. Our enemies will never figure that one out! Haha
This is an Ericsson-LG eMG80. It is their entry level phone system that supports digital, analog, and IP phones. It is a really capable system. I used to program and install them at my last job, and now I'm starting a business and plan to sell these.
I'm not 100% certain, but it would appear by looking at one of the iPECS brochures, that the HDMI connectors are used to attach 2 of these devices together.
That's what I was thinking, can probably daisy chain them.I guess the physical location (left/right) matters in terms of how they are configured, so probably why it's labeled that way.
I know hdmi are very high bandwidth with low latency, but I didn't know they could legally use the standard for that purpose. Interesting. I guess they got the (probably expensive) license for it.
4:50 That IC is most likely an INCA-P (PSB21493) or some of its siblings. It was originally designed by Siemens semiconductors (which became Infineon, then Lantiq, then Intel). It is a complete SoC for digital phones, with USB, DSP, PCM (IOM-2), and, most important, AMI decoding for the ISDN subset that it uses as interface to the PBX (U line or something. I am tempted to say UP0, but that's a Siemens proprietary interface). Actually, it may actually an INCA-S (PSB21483) used for full ISDN phones (S0 line), given the 4 conductors coming off the PBX. Hard to know, after Lantiq they started this cryptic markings, before that the name of the chip, part number, revision, etc. would be printed.
Excellent breakdown. Thank you Dave!
3:56 OH GOD, I was wearing headphones, my whole head, neck, and back started tingling.
The "HDMI" connectors are to daisy chain expansion boxes in case you need more lines.
I Used to install the Panasonic version of this phone system. Typically the HDMI ports are for adding a second enclosure for additional phones to be added. Panasonic uses a proprietary connector for that, but Ericsson/LG IPSecs probably used an off the shelf connector to save on the engineering of connector cables. Still going to charge you out the arse for them though.
That Jabra motorised lifter for the handset is used on phones without separat headset connector.
Interestingly, it had such a connector on the bottom.
Many headset ports only operate by selecting the headset on the phone. They're fine for wired headsets. A wireless headset on the port needs to be activated first before pressing the headset button. Connecting the headset through the handset port and using the lifter will ring the headset and allow the user to answer/hang-up a call while 100m from the phone.
More advanced phones have AUX ports or USB ports with EHS (electronic hook switch) features. Jabra makes EHS adapters that integrate alert, answer, mute and release electronically. That electromechanical handset lifter is becoming a thingy of the past.
Lifters are antique anymore. Use an EHS (electronic hook switch) adapter which digitally controls the phone remotely.
Correcto on the Jabra Dave, they are the best in the biz. I have two of them myself. Easiest to set up and use. They also have a good resale value on Ebay!! The Jabra piece that connects/clips onto the side of the phone under the handset is a "Handset Lifter" for the answer feature of the headset.
The lifty doodad reminds me of the old way modems used to have to connect to phone lines (like the Matthew Brodrick movie, War Games), via putting the actual handheld phone part onto a box with a speaker and microphone!
The reason is that phone companies argued that anything attached physically to the network had to be approved by them, and their own product, thus products were not legally allowed to connect directly to the phone wire or modify the intended "wire to phone" setup. Wild!
I think the TRANS/PGM is for Call transfer or Program mode. I wonder if the L/R has anything to do with daisy chaining another one of those main boxes for offices that need more than 24 stations.
This is an IP tel system - which is why it doesn't work on an analogue phone line. It expects IP digital signals on the main connector. Big advantage for small business is you can lease only 1 or 2 lines into your company and the IP tel PABX allows all inside calls to be done for zero cost. If you have 2 offices and both have IP tel then inter-office calls can also happen for nothing if you have IP connectivity between sites. Calls only go back out on to the PSTN when needed.
I worked for a small, local pizza chain that used this exact system for their phones at all of their stores.
It was provided by the telco (Telstra, I believe) and meant we had one phone number and 3/4 of these handsets could be used all at once and a separate wireless landline at our store. All ran through the NBN though not a landline to I presume a specific business phone plan.
I scored one of these on eBay for 10 bucks and use it run an interactive display of vintage PMG and Telecom telephones. It's even capable of reading the pulses from old rotary dial telephones.
Can we still see the "more interesting teardown" even tough it let the magic smoke out?
Yes, just couldn't do it yesterday because the smell was horrible. It's currently locked away in a box.
It's NDA'd and export restricted :P
Living on the edge dave! Magic smoke and office space smoke detectors are an easy way to spend $2k on a express fire truck delivery! Might get ya a 003key so you can isolate at the panel, for those occasional most likely moments!
It's a handset lifter. Amusing but that's how wireless headsets are often integrated into phones. You push a button on the headset and it raises the handset.
Interesting, I used to work on the big iron at AT&T, 5ESS and a a few other big switches back in the day. Also just landed a new gig with LG... Small world.
3:11 when a call comes in there is button somewhere that raises the receiver to answer the call. Its for systems where you can't use a head set without the receiver off the hook.
8:30 figured it out
Dave, what can I win if I bet correctly what smoked in that Schaffner unit? I place my bet on a Wima / Rifa metallised paper EMC filter cap. A lot of European appliances used them, but after 15-20 years, they become unreliable, they often crack and emit a lot of smoke, sometimes sparks either. I don't know how this 'feature' is compatible with their X/X2 and even Y safety ratings...
And I really don't understand why they are still produced nowadays. The industy knows for at least 30 years now that they are unreliable - and for their sparking, smoking agony - unsafe.
I won! I won! I told you at the very beginning, without even removing the case! So, what I won? ;)
I've worked in call centers for MSN when they had an ISP and for Comcast and plantronix seemed to be the brand of choice for the phones. The headsets were spindly, cheap things that got passed down from agents who quit. Wyse was also the standard for the thin clients. With software written in-house in visual basic at Comcast. Though the Comcast specific software for managing accounts was better. Trying to run 15 different programs and countless browser tabs on those thin clients was a nightmare, though.
You should try to ring that landline with the phone connected, if it behaves that funny on puny 48V DC I'm pretty sure that 110 V RMS AC ringing would be glorious :) And more seriously speaking, these call center/office telephone type thingies are usually surprisingly well built - simple, but sturdy and with an attention to detail - it's a thing that's very mass produced like consumer goods but at the other hand nobody would buy a telephone that dies after few years of usage, everyone abuses them mechanically and backwards compatibility with whatever equipment that's already installed is a big thing - try to explain to CEO that we have to replace all telephones in the building because we bought a new fancy PBX and call center software;)
lol I want to see this happen too. And yeah these office phones are tough! Had a lady at my work that would get mad and slam the receiver on the desk. (working 611 repair will do that to you after a while) We'd always joke about how strong those phones were because she never broke hers. Good ol' Northern Telecom. Their stuff was built like a tank.
interesting to note that all the antennas in this equipment are stub tuned
new lab tour dave!!!!!
@2:59 you are talking about the automatic answer and hang up. it will lift the receiver up which will signal you have answered the call and allow you to use both the handset and the headset.
the jabra is by far one of the best headsets for offices. its not bluetooth but more like dect cordless phones and have a pretty nice range.
I believe the hdmi is for an ACD boards
Some phones did not have actual switches for the handset to be on/off hook. The Siemens Rolm 4000 phones use a magnet in the handset and a hall effect sensor.
4:20 Some phones use a header like that for an extra contacts/quick dial module!
It a Geiger counter, bloody ☢️ radioactive!
I'm curious as to what he does with the stuff after the teardowns.
That Nortel chip is interesting. Nortel is pretty big in the industry (or was). Ericson did take over some of their tech I believe so it could be a continuation of the older Meridian or Norstar type systems.
Avaya bought out all their assets including the phones and meridian systems after Nortel went bankrupt
Bravo l excellent good video mate
the HDMI ports may be for integrated videoconferencing
I noticed a slight AvE enunciation in your descriptions.
I knew Heisenberg was lurking around in these forums ... ;-)
I think the HDMI ports could be used for call queue display.
it's a intel fakee arm
Intel PSB21473F processor INCA
The INCA-P integrates a single chip, all the functions required for a high-end PBX phone.
Looks like a ALL IN ONE embedded chip
the flash chips might be worth taking off
Bhola desde 🇪🇸 me encantas tus videos ;)
You missed the most interesting part: the Direct Access Arrangement (DAA) used to use large transformers and inductors to match the line impedance and isolate the line. Here (at about 12:07 centre screen) you see the modern solution that is all solid state about 1/20 the size - per channel, 2x 33pF Y2 600V 1812 size caps and 2 tssop's make a digital DAA that does all the matching and digital isolation via a DSP - either chipset from silicon labs SI3050 of similar - practically the product that founded silicon labs.
I would love to see a teardown of the other thing that blew up. Maybe kind of an autopsy?
15:23 Are 600 : 600 audio isolation transformers, pretty expensive (however good quality). Have a couple of these to avoid a ground loop in the audio signal path, it is an easy fix however not without a loss in frequenties, especially lower frequencies. For speech applications like this, it is really perfect and an easy fix.
Question: Can you do a video about ground loops? It very common (but nasty) problem in audio/analog applications when using microcontrollers or other digital components in (partial) analog environment.
Those are not expensive isolation transformers.....expensive isolation transformers have multiple mu-metal screens, and practically flat 20-20khz bandwidth, and virtually no distortion. Take a look at Jensen for an example of a REALLY good audio isolation transformer
@@joeambly6807 With expensive I mean in their kind and usage perspective. You have bigger ones and cheaper ones that can do the same however these are tiny and can do the same (or even better than cheaper ones) and saving space and is made of better/other or unusual materials. That's why they are more expensive.
The tiny transformers are also used in some commercial audio isolation products that needs to be small. In this case it is an expensive choice because they can achieve (almost) the same results with cheaper ones, it is just a voice application. For voice you don't need a perfect 20-20khz bandwidth, humans are unable to hear the difference with voice. A normal voice (when speaking) is approximately between 300 Hz to 3.5 KHz (at peak maybe 5Khz).
And Jensen, another cup of thea, is REALLY expensive but also of another size and used with other goals, music for example. You won't use this in such application like this. Besides, the 20khz, with transformers there is always a loss or change anyway, how well constructed and materials they plan to use. Unless you are able to hear it anyway (depends on age, hearing conditions etc), you don't want to listen to 20khz, it is pain, not nice (also for your pets if you have any). These specs are good BETWEEN your ears however don't say anything about the quality of sound to your ears. Don't be fooled by such 'great' specs, it says something about ability but nothing about quality.
Jabra can be used with Cisco VoIP phones.
PoE
That's great, thanks but please try also to do a tear down of an Ericsson crossbar exchange of the 1970's (parts of it). They had a factory in Melbourne, and also imported parts from Sweden, Mexico and Brazil. That will be a good class on heavy duty relays, complex wiring and RC filters for the contacts. Some exchanges had the call durations recorded in mechanical counters and then people took pictures every month of the counters to compare the number of minutes added for billing.
That rap is gonna be hard to find - Ericsson withdrew form manufacturing here, then they withdrew their entire technical presence, commonly their head techs were set up as distributors (my neighbour was), then they withdrew from those distributors too. Despite seeming like they have had a presence, they have basically completely withdrawn and nobody has had technical custodianship of old systems like with companies that actually have stuck round.
for ARM/ARK exchanges techs would call billing and manually read each meter for billing... did it in 1987/88...... i remember when xbar was upgraded to ARE11
wouldn't you expect some shielding/metal case for this type of equipment? at least it has a ground screw terminal ...
Man that ipecs logo is so cheap looking it makes them look like some wun hung lo brand
Probably looks cool with that blue light bar though!
But maybe that light can also be used for alarm conditions, so it might serve a purpose.
10:30 - "Mechanical DRC". Is DRC a brand name?
This stuff has moved to software with the phones and interfaces no jelly bean engineering. Still work to be done in mechanical design and aesthetics/ergonomics. Great video as usual. Even with the Chinese faux paux.
HDMI should be for stacking. It is fairly common in the Ethernet industry.
It is an MHS, Mechenical Hook switch. You can get it as EHS, Elektronik Hook switch. It is e very good brand.
is it just me or is that IEC connector's ground simply not connected? ... not a big deal on something isolated and plastic like this (with exception of that HDMI-like connector ) but it does have a ground lug on it
Would be awesome to see you do a comparison video of insides of titanium efficiency computer power supply vs cheap/not even 80 Plus one :-)
15:56 was the mains earth pin unconnected there?
It must be the Electric Surprise option.
At this type of connector earth pin is also at the bottom so it was probably soldered there
I bet the Schaeffner item let the magic smoke out of the IEC mains filter, Schaeffner mains filters are infamous for letting out the acrid magic smoke.
Didn't use standard phone lines so I hate it.
It would have be beautifull if it was POTS compatible and their terminal can send commands xDSL type to the main system.
Great teardown :)
5:55 long throw tweeter!
It's a device that picks up the receiver for calls. Very ghetto.
Thats a nice headset that jabra one , worth a bit that .
That thing over the speaker is called an automatic handset lifter. They are specific to each phone and listen to the tones to turn on and off headset.
DND=Dungeons and Dragons!
That is right on so many levels.
This is actually not a Ericsson phone system. This is just brand labeled Ericsson for the Aussie market. Ericsson has their own design they sell concurrently in Europe and USA (though it’s not popular in USA)
This used to be a Nortel device, but since Ericsson bought up Nortel, technically now it is an Ericsson device (in the teardown you can also see the Nortel-branded chips inside)
@00:00 I don't suppose that was supposed to be run at 110V not 240V? seeing as it has one of those odd sockets on it from some other country... you didn't just "Weller It" did you?
Those are Schuko's. 230 V
Hello sir
Want to ask you something
I wonder why VOIP chip is export restricted? To force people to use GSM which is easier to listen?
Normally means it is using proper encryption.
Haven't watched yet.... Is the box full of dog crap? That was he impression I always got from those systems 😂
>tfw you try to call Robert, Joe and Mike, but the magic smoke has escaped
What happened to "Don't turn it on - Take it apart".
He sold out, he even does product reviews now....
That’s not Bluetooth, you can probably walk several hundreds of feet from the phone.
10:21 CAD is is a useful tool, but it can be done without. Difference is before computers things were constructed the easy way using screws and stuff like that, now screws are extra cost. also machining these little things into the molds was not so easy even 10 years ago. But yes the idea is genius.
That's the trick, when you don't have the advanced tools you make it inherently simpler for yourself.
That's weird. Power plug with 3 lugs but the ground isn't connected :/
👍👍👍
5:04 can't tell if that's sarcasm or not...
I don't think its sarcasm, as the mechanism does indeed look quite solid.
Connecting the phone to a PSTN, was a bit risky and I doubt the PSTN owner would be happy as that phone is not certified for connection to their network!
Heh they use line protection for a reason! :P Actually it's pretty hard to mess up a PSTN line. Worse case scenario it shorts it out, and it's current limited so it will just raise a condition on the line and the voltage will drop.
It has RCM approval on it so I believe the enables it to be connected to the PSTN at least that was what I was told when I obtained my Open Registration for telecommunications cabling in Australia. The RCM is the Australian mark that authorises connection (amongst other things) which supersedes A/C Tick, Austel Approvals and all of the other Telecom / DOC standards. It also allows for the device to be connected to customer structured cabling systems. As @Red Squirrel said the PSTN is well hardened to handle lightening and static discharges, so the type of phone isn't an issue. That said Ethernet ports are not designed as tough and at an old work we had a Commander N series PABX that we wired into our Cat 5 structured cabling. A few people decided to change their patching at the desk and plugged their ethernet ports into the PABX and let the magic smoke out. Commander N put unadulterated 48V in and gave a crackling sound and rancid black smoke out.
Scrap it for the power supply.
Those are digital phones. Not VOIP, but still digital.
But...is it fused?!
Glass fuse on mains? Eek
youoll find this is a IP talepphone system
I';m surprise you didnt damage it connecting it tö a lines voltage
Most likely some pre-IP digital phone - IP phones use Ethernet.
Doesn't Samwha work with Nippon Chemicon and maybe even produce and sell Nippon Stuff, sometimes under own Label?
They are not bad, depending on Series and of course, NOT CHINESE. They're Korean.
I thought releasing the magic smoke is a perfect excuse for a teardown?...
Leave it alone. There is obviously some sort of demon in there.
Still in production under different badges. I sell and install these now in the States. Detailed info that might of of use here www.rjillc.com/CM_Telephone/Summit/User_Guides/User_Guides.html
Oh come on - you know the viewers want to see what you let the smoke out of! Especially if it was expensive test gear!
hah 48 volts on the phone line Plenty to bite you
Telecom boards are always sexy.
RIP headphone users at 3:56
UA-cam again no views 0 likes except my like
iPECS sounds like chest implants by apple...
the Ericsson, that's really cheap unimpressive construction :/ made for cost and volume, no expenses taken TM; the Jabra is ok
Lovely smell...
C'mon dave, give us a break! Please remove ALL stickers and show the chips under them, please. FAIL!
phone connector is likely ISDN , c'mon dave!
In NL those are know, but there maybe not so common.
"Ooh, designed and engineered in Denmark. Manufactured in China, of course. Hi to all my Danish viewers."
Uh, racist much?
Happy Chinese New Year Dave!
We're all in the human race.
Hehe, he said Tranny :) 6:20
Strowger system electromechanical boring old pcbs haha