User's Manual Part 1

Chapter 3 Installation
3.11 Communications Interfaces
3.11.1 PSTN Phone Line
To reduce the risk of fire, use only #26 AWG or larger (I.e. #24 AWG) UL
listed phone line cord.
The following steps should be performed to connect the PSTN phone line to the DRU (where
applicable):
1. Run a #26 AWG or larger phone line cord from the building/site PSTN termination
point to the DRU.
2. Loosen the domed sealing nut on the cable gland marked “TEL”, which is located on
the bottom-left side of the DRU – see Figure 3-29
.
3. Feed approximately 24 inches of phone line cord into the DRU through the “TEL”
cable gland.
4. Remove the lid screws from the Telco surge protector.
5. Install the cable grommets on the Telco surge protector:
• Use the small grommet for cord with a 0.114 to 0.225 inch diameter
• Use the large grommet for cord with a 0.250 to 0,350 inch diameter
6. Feed the phone line cord through the bottom grommet on the Telco surge protector.
7. Cut the cable to the proper length and remove approximately 1 inch of the outer
insulation to expose the individual wires.
8. Remove 0.25 inches of insulation from each wire to expose the copper conductor.
9. Insert the copper conductor into the “SURGE” screw terminals on the surge
protection modules and tighten the screws.
10. Replace the Telco surge protector lid.
SX03-10000-01-M01 3-38