Malicious caller identification, introduced in 1992 as Call Trace, is activated by Vertical service code Star codes *57, and is an upcharge fee subscription service offered by telephone company providers which, when dialed immediately after a malicious call, records meta-data for police follow-up. A police report must be filed after each use, as law enforcement will only act on the trace once a formal police report is filed in regard to the call. MCI is the ETSI standard, whereas MCT is the American one. They both do more or less the same thing though.
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| - Fangschaltung (de)
- Malicious caller identification (en)
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| - Unter einer Fangschaltung versteht man umgangssprachlich die Identifizierung anonymer Anrufer mittels eines besonderen vermittlungstechnischen Leistungsmerkmals. Im Zuge der vollständigen Digitalisierung des Telefonnetzes ist der Begriff jedoch heute überholt und wird deswegen in Fachkreisen für bestehende Telefonnetze nicht mehr verwendet. Man spricht hier vom Leistungsmerkmal Malicious Call Identification (MCID) oder auch dem Identifizieren böswilliger Anrufer. Die heutige Wirkungsweise der Identifizierung unterscheidet sich wesentlich von der älteren Technik der Fangschaltung, früher auch als Fangen bekannt. (de)
- Malicious caller identification, introduced in 1992 as Call Trace, is activated by Vertical service code Star codes *57, and is an upcharge fee subscription service offered by telephone company providers which, when dialed immediately after a malicious call, records meta-data for police follow-up. A police report must be filed after each use, as law enforcement will only act on the trace once a formal police report is filed in regard to the call. MCI is the ETSI standard, whereas MCT is the American one. They both do more or less the same thing though. (en)
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| - Unter einer Fangschaltung versteht man umgangssprachlich die Identifizierung anonymer Anrufer mittels eines besonderen vermittlungstechnischen Leistungsmerkmals. Im Zuge der vollständigen Digitalisierung des Telefonnetzes ist der Begriff jedoch heute überholt und wird deswegen in Fachkreisen für bestehende Telefonnetze nicht mehr verwendet. Man spricht hier vom Leistungsmerkmal Malicious Call Identification (MCID) oder auch dem Identifizieren böswilliger Anrufer. Die heutige Wirkungsweise der Identifizierung unterscheidet sich wesentlich von der älteren Technik der Fangschaltung, früher auch als Fangen bekannt. (de)
- Malicious caller identification, introduced in 1992 as Call Trace, is activated by Vertical service code Star codes *57, and is an upcharge fee subscription service offered by telephone company providers which, when dialed immediately after a malicious call, records meta-data for police follow-up. A police report must be filed after each use, as law enforcement will only act on the trace once a formal police report is filed in regard to the call. Malicious caller identification facility, also called malicious call trace or caller-activated malicious call trace, when subscribed or enabled, works by allowing a phone call recipient to mark or flag the preceding phone call connection as malicious (i.e. harassing, threatening, obscene, etc.). The phone system will then automatically trace the call by flagging station to station billing and routing data including start and end times. The call trace is not dependent upon call duration (as envisioned in dramatic movie plots) and will record all meta-data regardless of source conditions - even if the call was made from an unlisted number, a payphone or a number with caller identification disabled. To protect privacy the resulting trace data is only made available to law enforcement. How the user activates this feature depends on their phone system — generally it is either in-band-signaling DTMF sequence such as the *57 Vertical service code or a special button attached to their phone generating an out-of-band signal. For analogue services, many exchanges will interpret DTMF sequences to activate POTS. Digital services, such as ISDN or GSM, enable the CPE to activate MCI via out-of-band signaling. Often with PABXs with analogue phone connections, the PABX will interpret the DTMF and then activate the out-of-band signaling. Another way of identifying spam callers is checking through previous complaint history made by people about the phone number. The data is mostly crowdsourced and can be checked for previous complaints (i.e. Fraud, Scam, Harassment, Blackmail etc). Even if the number does not have previous history, reporting a complain publicly may help future victims of cyber fraud. MCI is the ETSI standard, whereas MCT is the American one. They both do more or less the same thing though. In Canada, the service is usually marketed as call trace, and fees generally only apply when the service is used. (en)
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