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Define
Definitions for
"Touchtone"
Keywords:
pushbuttons
,
dtmf
,
frequently
,
telephone
,
equipment
(1) Refers to DTMF signaling equipment. (2) Frequently used to describe telephone equipment with pushbuttons.
u4corp.com
Keywords:
multifrequency
,
dual
,
trademark
,
tone
,
see
A trademark of AT + T. See Dual-Tone Multifrequency.
datacalleurope.com
Keywords:
tdn
,
prescribed
,
mark
,
registered
,
blocking
(TDN) (Registered service mark) Provides for the origination of calls by a given group of devices for a prescribed value of some blocking function.
bscinter.buffalostate.edu