Transmitting Subscriber Identification

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The Transmitting Subscriber Identification (TSID) is a string that identifies the sender of a fax, and is sent by the fax machine. This identification information typically appears in the header to help the recipient determine where the fax originates from. This string is usually a combination of the fax or telephone number and the name of the sender and is often the same as the Called Subscriber Identification (CSID).

[edit] See also

• Caller ID
• Called Subscriber Identification (CSID)