Garmin NavTalk Owner's Manual page 121

: An accessory that allows power for the NavTalk while
charging the battery pack using a 120 VAC wall outlet.
A socket on the bottom of the NavTalk where
you can attach accessories such as an AC adapter, trickle charger, DC
adapter or data accessories.
The amount of time you spend using a cellular
system, between the time you place a call and the end or that call.
The device on your NavTalk that sends and receives cellular
signals.
One of two the two organizations in a geographic
(cell) area that owns and operates a cellular system.
A company affiliated with a cellular carrier
that provides cellular service to its customers.
The radio waves that carry information between your
cellular phone and the cellular system.
The cellular equipment in a given geographic area that
relays signals to and from individual cellular telephones and the landline
telephone system.
An accessory device that allows you to
power your phone and charge its batteries from a car' s cigarette lighter.
Often referred to as a DC Adapter.
See Dual Tone Multi-Frequency tones.
A feature' s original setting as pre-programmed at the factory.
Defaulting to the original setting is the result of the product user' s deci-
sion not to make any changes when options are offered.
The tones that your phone transmits
when a key on the keypad is pressed. They are used to access automated
calling systems, such as voice mail, paging services, banking-by-phone,
credit card access, etc.
The outermost range of a cellular system where cellular
signals are weak.