Tuuliku tee 4, Tallinn
Monday – Friday: 09:00 – 17:00
Saturday – Sunday: Close
Line short-circuit protection unit EU 222
Digital intercom subscriber line protection unit.
To protect the line from short circuit (error E-2) and from high voltage entering the doorphone line.
When an E-2 error occurs, only a non-working apartment is blocked, the intercom continues to work.