Axia IP-Intercom System Installation & User Manual page 40

Alternatively, if both pieces of equipment are not
both tied to a common facility ground, both sides of the
shield must be connected. In this case the "-" side of the
nodes inputs are tied to the shield of the RJ-45 plug as
follows:
Axia node's inputs fed from a floating source, with no
8
1
facility ground in common with the Axia node.
+
R
+
L
Version 1.2 July 2010