How do I get all
the phone ports on the back of my PhoneTree® to work?

All PhoneTree® USB systems ship with four phone ports on the back of the unit,
even if it is only a one-line system. The operation of the phone ports
is dependent on the presence of an internal phone line card inside of the unit.
A one-line PhoneTree® system includes only one of these line cards inside, therefore
only port 1 (labeled Phone Line 1) on the back of the unit will work. Similarly,
if you purchased a two-line system, your unit will come with two of the line cards,
enabling both ports 1 and 2. Contact PhoneTree® sales at 800.951.8733 for
information about buying additional telephone line cards for your unit.