Clear-Com V12PDDXY - Manual (Page 151)

7.2.18 Expansion panel output
V-Series main panels have an industry standard RJ45 socket allowing up to eight V Series
expansion panels to be daisy chained from it.
Figure 180: Example of daisy chained panels
The pinout for the expansion panel cable RJ45 connector is given below:
Figure 181: Expansion panel connector pinout
The CAT5 cables used to connect V Series main panels to expansion panels and expansion
panels to further expansion panels are wired as straight through and the same signals are
present along the daisy chain.
151 V-Series Panels User Guide