Weird ISDN test device: Alcatel Astroline MPRA

Dear all,
I recently visited @8818freak and he showed me his newest acquisition, an ISDN testing device called “Alcatel Astroline MPRA”.
Sadly a manual is missing, so we do not really know what the device is exactly meant for or how to use ist.
The only information I could find so far is that it is called “ISDN-D-Kanal-Monitor zur Überwachung v. PCM Leitungen”.
When switched on, the devices initializes itself. What surprised me most is that it does not have a dot matrix display but rather a more simple display with fixed symbols/texts:


After initialization, this is the idle display:
Groß (IMG_5712)
Here the back of the device:

One cable came with it. It is a Y-cable, featuring two connectors consisting of three lab plugs. They go into the device into LINE A IN and LINE B IN. The other end of the cable features a TAE-style connector which seems to fit into the special connector of a NTPM.

The devices features a headphone connector.
And also a connector labeled “LINE A/B OUT”, which - strangely enough - is a connector which looks like a SCSI-3 connector-type (we didn’t count the pins, though).

The device is lightweight, and added to the exceptional case design with its hexagonal form style “head”, it does not feature any possibilities to add a strap, and no protective sleeve apart from a carrying bag came with it.

Maybe, someone can add some information or even has access to a manual?

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You can still find the Alcatel family photo so maybe other family members left more traces ;). The Astroline MCA-2 looks pretty much the same to operate.

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Thanks a lot for the information. However, I did not fully understand what was the intended user group of that device and which use cases it covers. Especially the fragile case design makes me think that it is not optimized for rough daily service technician use.

I think your quote “ISDN-D-Kanal-Monitor zur Überwachung v. PCM Leitungen” is already a quite clear description, isn’t it? From the LCD we can also see that it is able to indicate various framing related information like frame sync, alarms, CRC4 presence, etc. - and regarding D-channe lit can indicate the different L2 frame types (SABME, UA, …)

Based on the buttons, it also looks like you can cycle through the B-channels and listen to the speech and listen to it (if there is any on them, of course).

Why the case is not very ruggedized, I guess only the product designers/managers can answer…