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274 Chapter 21 Replacing telephones
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Replacing telephones with different models
If you disconnect a digital or analogy telephone and connect a new telephone of a different type
into the same jack, for example, replacing an T7310 telephone with an M7324, the new telephone
keeps the old extension number but does not retain the user parameters. The new telephone
receives a default profile for a telephone of its type. Refer to the Business Communications
Manager Programming Operations Guide for set configuration information.
If the new telephone has fewer lines than the old one, automatic outgoing line selection cannot
work with the Handsfree/Mute feature. You must select a line manually.
Status of the replaced telephone
The replaced telephone loses its programming and internal number. If the telephone is plugged in
again at another jack, the Business Communications Manager considers the replaced telephone a
new telephone.
Note: If you replace a digital telephone with an IP telephone, or vice versa, programming
is lost because the connection method is different and the DNs are assigned differently.
Refer to the IP Telephony Configuration Guide for directions for installing and moving an
IP telephone.