Tunstall Vi User Manual page 6

The home console unit contains a built in DSL filter so it is compatible
with broadband/cable telephone phone service. A separate DSL filter is
not required.
WARNING IF YOU HAVE A BROADBAND/CABLE PHONE
SERVICE AND THERE IS A POWER FAILURE
If there is a power failure to your home, your telephone service will
become disabled unless you have a back-up power supply connected
to your home or modem. Although the PERS unit does have an internal
back-up battery, it will be unable to transmit a signal to the Response
Center because there is no dial tone.
Important safety notice – seize line wiring information
If you have more than one telephone in your home sharing the same
telephone number/line as the Home Console Unit and one of those
phone extensions is in use or off the hook, the system will not operate
without the installation of an RJ31x seize line telephone jack. Contact
your telephone service carrier to arrange for the installation of this phone
jack. The system is to be wired in accordance with the following diagram.
A separate line cord (part number XD3605044) is required to connect to
an RJ31x jack.
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