Called Subscriber Identification
A called subscriber identification (abbreviated CSID) is a string that identifies a specific fax machine as the recipient of a fax. This string (typically less than 40 characters) is usually a combination of the fax machine's telephone number and identification of the fax machine's user. Origins The CSID (and related TSID) are part of the modern landline fax specification. The CSID is often the same as the same machine's transmitting subscriber identification (TSID). A CSID and TSID are usually programmed into a fax machine when the machine is set up. How it works When a fax machine receives a fax, it sends its CSID to the transmitting machine. The CSID is displayed on the sending fax machine and is usually recorded in the transmitting machine's log of sent faxes and printed on a report or confirmation of the fax transmission. This helps to confirm that the fax is being sent to the correct recipient. Computer software sometimes emulates the functions of a fax machine. A CSID ...
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Caller ID
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. The caller ID service may include the transmission of a name associated with the calling telephone number, in a service called Calling Name Presentation (CNAM). The service was first defined in 1993 in International Telecommunication Union—Telecommunication Standardization Sector (ITU-T) Recommendation Q.731.3. The information received from the service is displayed on a telephone display screen, on a separately attached device, or on other displays, such as cable television sets when telephone and television service is provided by the same vendor. Value to society includes use by suicide-prevention hot lines and enabling businesses "like pizza restaurants and florists" to quickly have confidence in telephoned orders. The ...
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