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In the US, the caller's name, or CNAM information, is not sent during a call. Rather, the terminating carrier is responsible for providing the Caller ID information to its customer. The terminating carrier performs a database lookup using the caller's phone number to obtain the name information to display with Caller ID.
The CNAM databases are independent databases operated by LECs and other private companies. The called party's carrier has the responsibility to perform the CNAM lookup, and it is possible that lookups for the same telephone number from different locations return different name information.
Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.
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French regional CNAM Centres are financially independent but pedagogically linked to the CNAM public institution based in Paris (namely of enrolment, selection and evaluation of candidates), and their existence is governed by a specific ministry decree. Half of the regional CNAM centres budget is allocated by the French regional councils. A ...
CNAM may refer to: Conservatoire national des arts et métiers (National Conservatory of Arts and Crafts) , a French research and education institution Calling Name Presentation , a Caller ID service
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--Misleading/Incorrect Information-- This article suggests that caller name (or cnam) and telephone number id are the same service. They are not. Telephone number ID is a standard SS7 service that displays the ANI or calling number. CNAM requires an SS7 query to a database of names associated with those numbers.