urmet domus IPerCom 3.1.0 System Technical Manual For The Installer page 39

Since each node can be associated with two digits, to identify in the entire topology an apartment that is
below a floor, a stair, a block and a site, a numeric code of 10 digits is needed. In the example of Figure 2,
by assigning to the base site a code equal to "01", to the block the code "01", to the second stair "02", to
the third floor of the stair "03" and to the second apartment of such floor "02", the concerned apartment
can be identified by the 10-digit numeric code "0101020302".
If we decide to use always 10 digits to identify the position of all the topological nodes of the system, to
identify the floor of the example above it will not be necessary to enter the numeric code of the apartment;
it can be replaced by "##": therefore, we will have the following 10-digit code "01010203##". Similarly, the
stair, the block and the site of the example will be identified respectively by the following codes:
"010102######", "0101######" and 01########".
The 10-digit code that identifies the generic topological node in the system topology is called topological
code.
Each IPerCom device must be placed (installed) in a specific topological node (site, block, stair, floor, or
apartment).
Apartment station (e.g. MAX video door phones) are normally installed in an apartment, call stations or
calling stations (e.g. Call Modules) and Switchboards are generally installed on a unit or block.
3.2 Topological path and topological group
The topological path is the set of (topological) nodes which start from a certain node and arrive to the site
node.
The topological group of a node is given by the set of nodes contained in the group itself (the node in
question and all the nodes below it).
Considering the topological structure shown in the following figure, we can say that:
Figure 3: Example of topological path and group
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