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Single-Line (Duplex) Splitters
If you have separate answering machines or fax machines and want to use them on the same phone jack
as your phone line, a duplex or single-line splitter is typically used. A duplex splitter divides a single phone
line between two new jacks. Devices that are plugged into a duplex splitter share the same line and phone
number. The splitter provided by ooma is a duplex splitter and is used to divide and share your line between
your DSL modem (if applicable) and the ooma Hub.
Two-Line Splitters
Some homes with more than one phone number have wiring that combines both lines into one jack. With
these jacks, a splitter divides the single jack into two jacks, one for line one and the other for line two. This is
called a two-line splitter. Phones plugged into the two-line splitter will have different lines and different phone
numbers. If you have a two-line splitter, make sure you install the ooma Hub or ooma Scout device between
the phone and the splitter jack, instead of between the phone and wall plate. Be sure that your ooma Hub and
ooma Scout devices are all plugged into the same line (with the same phone number).
Dual-Jack Wall Plates
Phone wall plates come in one and two, or dual-jack congurations:
Wall plates with dual jacks are basically splitters built into your wall. They can be single-line splitters (duplex)
or two-line splitters. If you have a dual-jack plate with two lines, make sure you install all your ooma devices
on the same phone jack. Your ooma Hub and ooma Scouts need to be plugged into the same line (with the
same phone number).
appendix a: identifying your equipment
Phone Jack Phone Jack