EDAC Installation Guide
512-1090-001, Revision K0
Page 18 of 56
Indicator Lamps
Two green lamps on the front of the unit indicate that the unit is receiving 5V and 12V
power levels. The other 12 lamps are red and illuminate when the associated telephone
set is active.
Figure 4 shows positions for each port’s LED. LEDs may illuminate where port cards
have been installed but are not cross-connected since port cards not cross-connected
do not receive idle code. When relay cards are installed, the associated indicator lamp
will not be lit.
Figure 4. Indicator Lamps
RJ-21 (25-Pair) Connector
An RJ-21 (25-
pair) male connector provides access to the EDAC’s digital inputs, analog
outputs and relay contact pairs.
Cabling
To attach the EDAC unit to a user-furnished cross-connect block, the user must provide
a 25-pair, 24 AWG (0.5mm) standard twisted pair wire cable terminated with a female
RJ-21 connector on one end.
