156
Installing and Wiring Telephones
October 2002
Install 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:
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.
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.
16 Not Used
42 Not Used
17 Not Used
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24 Not Used
50 Not Used
25 Not Used
External Alarm Connector Pinout — Continued
Pin Designation Definition
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