Campbell Scientific VS1 Telephone Modem with Voice Synthesizer - Manual (Page 5)

VS1 AND VOICE SYNTHESIZER EDITOR
3
If the unit is mounted where there is a standard
modular phone plug available then connect the
phone cable provided with the VS1 from the
modular wall plug to the VS1, as shown in
Figure 3-2.
Connect the 14 AWG grounding wire (provided
with the VS1) to the grounding terminal (GND)
on the VS1. Connect the other end to the CR10
ground (G) on the wiring panel. If the enclosure
has a grounded bus bar, then connect the
ground wire to the bus bar instead of the
datalogger ground. The datalogger ground
should be tied to earth ground. See Section
14.7 in the CR10 Operator's Manual.
FIGURE 3-1. VS1 Jumper Locations