TP-Link TDW8968V3 User Manual page 5

Connection to party line service is subject to state tariffs. Contact the state public
utility commission, public service commission or corporation commission for
information.
If your home has specially wired alarm equipment connected to the telephone
line, ensure the installation of this equipment does not disable your alarm
equipment. If you have questions about what will disable alarm equipment,
consult your telephone company or a qualified installer.
WHEN PROGRAMMING EMERGENCY NUMBERS AND(OR) MAKING TEST
CALLS TO EMERGENCY NUMBERS:
1) Remain on the line and briefly explain to the dispatcher the reason for the call.
2) Perform such activities in the off-peak hours, such as early morning or late
evenings.