page_title: Caller ID
section_title: Regional differences
hierarchical_section_title: Caller ID / Regional differences
caption_attribution_description: English: Caller ID converter that converts from DTMF to FSK format
context_page_description: Caller identification is a telephone service, available in analog and digital telephone systems, including voice over IP, 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. The service was first defined in 1993 in International Telecommunication Union—Telecommunication Standardization Sector 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.
  Caller ID service is variously known by many similar terms, such as CID, calling line identification, calling number delivery, calling number identification, calling line identification presentation, and call display.
context_section_description: Caller ID transmission is implemented using different technologies and standards in some countries. In the United States the Bellcore FSK standard is prevalent, whereas Taiwan uses ETSI FSK. Sometimes individual service providers within a country use different standards. Caller ID converters can be used to translate from one standard to another.
caption: Converter that converts from DTMF to FSK format
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