I see it in a “insertion” and the seller claim is Alcatel, but is really similar to Socotel s63.
It appear also on this youtube vid
Anyone recognize excact model? Is a pbx?
It appear also on this youtube vid
Antique key system phone, looks European, 7 lines. These key systems were usually rented from the telephone company and fed these phones with 25 pair cables. They can be repurposed on a regular POTS line but of course the lights in the buttons won’t light up. If you really want to make it work on Asterisk then get yourself a Grandstream HT813 which can generate 90v ringing signal and has an option to permit pulse dialing.
I donated my last rotary dial phone to a telephone museum a few months ago.