Author Topic: EEVblog #1177 - Ericsson PABX Teardown  (Read 1014 times)

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Offline EEVblog

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EEVblog #1177 - Ericsson PABX Teardown
« on: February 06, 2019, 09:38:47 am »
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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Offline johnlsenchak

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Re: EEVblog #1177 -BUGGER THAT !
« Reply #1 on: February 06, 2019, 10:32:05 am »

But Dave, you  didn't include the full  video  of the original  unit  that  you  where doing in the tear down , letting  out all the magic smoke out


Anyway, I  got  flashbacks of  working   many years ago at Tie Communication (now defunct)   in  Shelton Connecticut who  made  POTS  PBX   telephones systems  for businesses

Nice units back  in the day,  state of the art   PBX systems   with  expandable  truck and line  cards,  CPU  boards , and  big  switching  powers  supplies  to run
the  whole rack unit including  the many  phones  that connected to it

I  also  worked for telecom manufactures  Nitsuki  America  and Harman   Simmons  Power  supplies who  made  bad  ass switching and linear   power  supplies 
John Senchak "Daytona  Beach  Florida "
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Offline tsman

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Re: EEVblog #1177 - Ericsson PABX Teardown
« Reply #2 on: February 06, 2019, 11:17:26 am »
Those Jabra headsets look to be DECT so the blinking is probably the headset complaining it can't communicate with its charger/basestation.

The HDMI sockets are for connecting to an expansion unit for more lines. They've got a weird HDMI plug with a retaining screw mechanism.
 

Offline johnh

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Re: EEVblog #1177 - Ericsson PABX Teardown
« Reply #3 on: February 06, 2019, 06:22:25 pm »
Handset lifter when call is answered from the jabra headset
 

Offline rrinker

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Re: EEVblog #1177 - Ericsson PABX Teardown
« Reply #4 on: February 07, 2019, 01:43:22 am »
 This was probably one of the few videos where I was actually yelling at the screen, first that the headsets weren't Bluetooth, then that the device ont he phone was a handset lifter, and then on the inside of the main unit, about all the unpopulated components, because that same PCB is used for both a 4 line and an 8 line expansion card, and the people in that office before only needed a 4 line version.

 But Dave came through and figured it out in the end. I think - though he never really corrected the idea that the headsets use BT, even after he pulled up the datasheet for the chip inside which says it's a DECT controller.

 Kind of surprised Dave's not come across such equipment. I know not much of his professional career was spent working for big companies that might have all the fancy gadgets, but surely Altium has a halfway decent phone system? I don't mean knowledge of the controller itself, but out at the user interface side, the phones and headsets. Some of my coworkers who spend almost their entire day on the phone have headsets, but they aren't those nice fancy pants Jabra ones.  Somewhere I am pretty sure I saved a phone from our old system before we went to a more modern IP telephone solution. I know I saved all of the phone to wall cables I could, because my model railroad control system uses those same 6 wire flat cables our old phone system used. For a small office, our controller was HUGE, so I didn't save that. Probably 10X the physical size of the one in this video, and at our peak we had maybe a dozen and a half extensions. Possibly 2 dozen. Not sire why we had such a monster system - grandioise expansion plans I guess, but we got bought out and as soon as we got linked into the new corporate network, the installed the equipment and replaced all the old phones.


 

Offline EEVblog

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Re: EEVblog #1177 - Ericsson PABX Teardown
« Reply #5 on: February 07, 2019, 11:30:12 am »
Kind of surprised Dave's not come across such equipment. I know not much of his professional career was spent working for big companies that might have all the fancy gadgets, but surely Altium has a halfway decent phone system?

Engineers in cubicles don't get phones.
Actually, I think we did at Altium, but hardly ever used it.
Phones at all previous companies were your basic POTS touch tone.


« Last Edit: February 07, 2019, 11:37:22 am by EEVblog »
 

Offline EEVblog

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Re: EEVblog #1177 -BUGGER THAT !
« Reply #6 on: February 07, 2019, 11:32:02 am »
But Dave, you  didn't include the full  video  of the original  unit  that  you  where doing in the tear down , letting  out all the magic smoke out


What's the point, I couldn't finish the video because it smoked and stunk the place out, I had to keep it in a box.
 

Offline Andrew McNamara

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Re: EEVblog #1177 -BUGGER THAT !
« Reply #7 on: February 08, 2019, 12:35:27 pm »
What's the point, I couldn't finish the video because it smoked and stunk the place out, I had to keep it in a box.

I hope we eventually get to see a video of the offending item, maybe with some analysis of what went wrong, even if only on the second channel.
 


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