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Installing and wiring telephones and trunks
90 Installing and Connecting the MDF and Telephones
4. Connect emergency transfer power (Blue-White and White-Blue)) as shown in
Table 14: Alarm Inputs at TN2312BP Adapter DB9 Alarm Connector
.
Installing off-premises station wiring
The local telephone company provides cabling outside the building for off-premises stations.
The off-premises stations can appear on any of the RJ21X network interfaces provided for the
central office (CO) trunks.
!
CAUTION:
CAUTION: Only an FCC-approved (or equivalent) analog type telephone (such as a
2500-type), can be used as an off-premises station. The TN746B and TN2183
Analog Line circuit packs can be connected to off-premises stations.
To install the off-premises station wiring:
1. Install an A25D (male to male) cable between the RJ21X network interface and a sneak
fuse panel.
2. At the main distribution frame (MDF), connect jumper wires between one row/connecting
block in the green field and up to three rows/connecting blocks in the purple field to
concentrate the analog line pairs.
Table 14: Alarm Inputs at TN2312BP Adapter DB9 Alarm Connector
Color AUX Connector Pair Name
*
*. For additional information on the auxiliary field on the Main Distribution Field, see
Figure 49: Connections for telephone used for emergency transfer on page 103 and
Figure 50: Connections for telephone used for emergency transfer and as normal
extension on page 104.
White-Blue Ground (Pin 2) XR
Blue-White XFER48 (Emergency Transfer) (Pin 1)
White-Orange Ground (Pin 8) 1m
Orange-White AP2 Minor Alarm Input (Pin 3)
White-Green EXTALMB (Ground) Alarm Output (Pin 5) AL
Green-White EXTALMA Alarm Output (Pin 4)
White-Brown Ground (Pin 7) 1M
Brown-White AP1 Major Alarm Input (Pin 6)