User's Manual

Selex ES S.p.A.
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by Selex ES S.p.A. in writing
29
E/M Type V Interface Model
E/M Type V interface is a symmetrical two−wire lead arrangement that signals in both directions by
means of open for not active and ground for active signalling. The following table displays the sent
signal states for active/not active signaling. The RBS grounds its M−lead to signal a seizure. The other
device applies battery to its M−lead to signal a seizure. The RBS expects to see active conditions on
the E−lead and signal active to the remote device on M−lead.
E/M Proprietary Type Interface Model
E/M Proprietary Type provides a four−wire fully−looped arrangement that provides full isolation
between the trunks and signaling units. The following table displays the sent signal states for
active/not active signaling. The RBS grounds its M−lead to signal a seizure. The other device applies
battery to its M−lead to signal a seizure. The RBS expects to see active conditions on the E−lead and
signal active to the remote device on M−lead.
M+
M-
E+
E-
M+
M-
E+
E-
+48v
RBS side
RBS side
RBS side