Campbell Scientific COM310 Voice Communications Modem - Manual (Page 32)

COM310 Voice Communications Modem
Figures 5 and 6 show the wiring for connecting the surge suppressor. Color
coding of wires may vary. The important consideration is to follow TIP all the
way through and RING all the way through. Getting wires crossed typically
does not damage anything. The phone line just will not work until the wires
are straightened out.
Phone wires are live, typically with low voltage (24 Vdc).
While not harmful in most situations, Campbell Scientific
recommends installing the surge protector in dry weather
only by technicians with a healthy heart. CAUTION
FIGURE 5. Top View of Surge Suppressor Wiring
26