Originating Number
(1) The number associated with the telephone station(s)
from which switched calls are originated (or terminated).
(2) A software feature associated with Feature Group
D (and optional on Feature Group B) circuits. ANI provides
the originating local telephone number of the calling
party. This information is transmitted as part of the
digit stream in the signalling protocol, and included
in the Call Detail Record for billing purposes.
(3) ANI may also be used to refer to any phone number.