Hi!
It seems to be analogous, but I can’t find any more information about these systems. If you are familiar with a multimeter, you could try to find out at which pin of the intercom the voltage rise occurs when the doorbell is pressed. Are there any screw terminals inside or do you have to solder anyway?
Are L+ and L- the only wires connected to the intercom? This could indicate a bus-based system. You could try to connect it described here: Howto connect the Nuki Opener to unknown intercom systems Perhaps you can try to obtain further information from your supplier, such as a wiring diagram of the system, which would help us to make a more accurate statement.