Oricom AMPLIFIED DIGITAL ANSWERING SYSTEM AM900 - Manual (Page 5)

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General Information
Notes for operation in New Zealand
The grant of a Telepermit for any item of terminal equipment indicates
only that Telecom has accepted that the item complies with minimum
conditions for connection to its network. It indicates no endorsement
of the product by Telecom, nor does it provide any sort of warranty.
Above all, it provides no assurance that any item will work correctly in
all respects with another item of Telepermitted equipment of a different
make or model, nor does it imply that any product is compatible with all
of Telecom’s network services.
Telepermitted equipment only may be connected to the auxiliary
telephone port. The auxiliary telephone port is not specifically designed
for 3-wire-connected equipment, 3-wire-connected equipment might not
respond to incoming ringing when attached to this port.
REN (RN for New Zealand)
The REN (Ringer Equivalence Number) or (RN) is of significance only if you
wish to connect more than 1 telephone to your telephone line. A standard
telephone line has a maximum REN capacity of 5 (RN of 5). It is possible
to connect 5 devices with a REN of 1 (RN of 1) with no degradation to the
product’s performance. Exceeding this limit may cause the volume of the
ringer in any phone to decrease or not ring at all.