its a plastic panel from the 80's
gemini / concept had something like 12 or 20 cores between the controls,
it very unlikely anything but the correct product would work
no, it was 4 & 8 zone product with either on board or blank metal endstation
individual zone tamper IIRC
?
https://www.thesecurityinstaller.co.uk/community/forum/37-trade-access-control/
your "trade full memeber" should let you view & post in the above link ?
that's the difference,
as toy in a collection it don't matter if it f***ks up & crashes
as working alarm, either I or the subscriber is going to pay for somebody to come on site & get it going should it f**k up & crash
the commercial reality is new controls & an couiple of hours to fit them & hand over is much better value
Assuming they have purchased the property, all the books & service info should have been requested by their solicitor
Its an alarm from the 1980's , it predates PDF, the internet, the mobile phone ect...
Buy a new system