St installation conditions, Universal version, Compact version – 2N Lift emergency phone 2N SingleTalk - Manual, 1514 v6.3.0 User Manual
Page 20: Before you start 2.2

Before You Start
2.2
19
ST Installation Conditions
ST is not designed for outdoor applications.
The product is connected to a telephone line where life-endangering voltage
may occur. Therefore, be sure to keep the safety precautions – refer to the
Electric Installation section.
It is forbidden to connect ST parallel to another terminal on a line.
The lift wall must be perfectly flat.
Tip
Use a portable telephone to check the telephone line function.
Do you know the telephone line number to be used? Check its
functionality.
For a PBX line connection, check other relevant conditions as included in
the Ways of ST Connection section.
Make sure that the lift panel has been prepared properly for ST mounting.
Universal version
Check the lift panel for advance preparation for ST mounting.
Compact version
It is advisable to mount ST where the lift cabin wall is also accessible from the
outside (from the lift shaft).