urmet domus IPerCom 3.1.0 System Technical Manual For The Installer page 216

On the nodes below the stair node (floors and apartments), where a Gateway IPerCom-2Voice 1083/59 has
been placed, it is not possible to add any device; the "Add new device" button on these nodes shows the
following screen:
Figure 237: Adding devices on nodes below a stair with Gateway IPerCom-2Voice
On the stair node where the Gateway IPerCom-2Voice was added, it is possible to add new devices.
On the contrary, if a gateway is added on a stair node under which several IPerCom devices are placed,
these will be deleted (excluding those placed on the stair node itself):
Figure 238: Remove devices if a gateway is added in stair
216 MT124-032N