ADS Environmental Services Model 4000 530017 A0 - Manual (Page 10)

Introduction 1-5
The telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect the operation
of this equipment. If this occurs, the telephone company will
provide advance notice so you can make necessary modifications to
maintain uninterrupted service.
In the unlikely event that this equipment harms the telephone
network, the telephone company will notify you that temporarily
discontinuing telephone service may be required. Notification will
occur in advance of discontinuation, or as soon as practically
possible. They will also inform you of your right to file a
complaint with the FCC if necessary.
This equipment may not be used on public coin phone service
provided by the telephone company. Connection to party line
service is subject to state tariffs.