120 / Glossary
Trunk Module: A module that allows you to install additional Trunk Cartridges in your system to provide up to 12 additional trunks.
Twinning: With the XC system, the ability of users who have both a wireline (desk) telephone and Companion portable telephone to answer calls from either device. Twinning is made possible either through assigning Answer DNs or configuring target lines.
wireless activity within this band for a specified geographical location.
UTAM Recovery Key (U.S. only):
Reactivates a Companion wireless system that has been disabled and restores the Companion system to its previous radio credit capacity.
See the troubleshooting chapter.
W
wireless: See Companion.
U
Undirected Receive Signal Strength Indicator:
A measurement of the signal strength between a portable and the Base Station radio that the portable is currently linked to.
See also Receive Signal Strength Indicator.
UTAM Activation Key (U.S. only):
Activates the wireless capability on a new system and in system upgrades involving a change to the number of Base Stations supported.
UTAM Inc. (U.S. only): The Federal
Communications Commission (FCC) has appointed UTAM Inc. as the body responsible for coordinating and verifying the installation or relocation of personal wireless communication devices operating between 1.92 GHz and
1.93GHz. This allows UTAM Inc. to monitor and control the level of
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