EDAC Installation Guide
512-1090-001, Revision K0
Page 40 of 56
Cross Connecting the Digital Input
1. Plug a standard female RJ-21 (25-pair) cable connector (not supplied with the
unit) into the front of the unit.
2. Using Table 15 and Figure 19 as guides, cross connect the required quantity of
EDAC digital input pairs in parallel with the digital telephones to be monitored.
The EDAC digital input is not polarity sensitive, so “Tip to Tip” or “Tip to Ring”
can be connected. Up to 12 digital telephones may be connected to the 25-pair
connector if relay cards are not used or up to eight per connector if relay cards
are required.
Cross Connecting the Analog Output
Cross connect the EDAC’s analog audio output pairs to the recording equipment’s
analog input pairs. Refer to Table 15 for the wiring pinouts and color codes. The analog
outputs
are not polarity sensitive, so “Tip to Tip” or “Tip to Ring” may be connected.
Specific attention must be applied to 4 wire systems. The analog output of each pair of
port cards for a specific 4 wire phone must be wired in series.
Cross Connecting Relays
If relay cards are used, cross connect the relay contact pairs to the recording equipment
contact closure pairs. Refer to Table 15 RJ-21 (25-pair) Connector Pinout. The relay
contact outputs are not polarity sensitive, so
“Tip to Tip” or “Tip to Ring” may be
connected.
Figure 19. Typical Cross Connection Diagram for One Base Unit with 12 Port
Cards
