Merlin 3070 Service And Maintenance Manual page 68

TROUBLE ON ONE TELEPHONE
Miscellaneous
Symptom:
A voice terminal or voice terminal accessory suddenly fails.
Possible Cause
A surge of static electricity occurred.
A7-4
Recommended Action
If new carpeting is causing the static electricity,
spray the area with an antistatic spray.
Make sure the control unit is connected to a third-
wire (green-wire) ground, not a conduit ground.