VTech DS6511_-15-16-2-3-4A Manual - Manual (Page 12)

Getting started
8
Rewiring of telephone line for cable/VoIP service users
If you have changed to cable/VoIP service through a modem/router/terminal adapter
to establish telephone connection, the existing telephone jacks in your home may
no longer work. Your cable/VoIP service provider uses a separate cable connecting
from the main line to the modem installed in your home.
To allow all existing telephone jacks to work, rewiring of the telephone line (as
indicated by the dotted line in the illustration below) may be needed. Rewiring
requires professional installation (fees may apply). Contact your cable/VoIP service
provider for more information.
NEW
OLD
Conventional
telephone line jack
Modem/Router/
Terminal adapter
Main cable
line
Main
landline