Sharp FO-2150 Operation Manual page 9

Specifications
Important:
This facsimile machine is not designed for use on a line which has
call waiting, call forwarding, or certain other special services offered
by your telephone company. If you attempt to use the fax machine on
a telephone line using any of these services, you may experience
errors during transmission and reception of facsimile messages.
This facsimile machine is not compatible with digital telephone
systems.
This facsimile machine is designed to operate in Australia and New
Zealand only.
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