Comment Silent Call Rate (Score 1) 297
A rate of 3% or less has been quoted in regards to the maximum number of silent calls (per day? per week?) that these boiler-room call centre operations are supposed to legally adhere to.
Sorry to point out the obvious, but:
(1) Telejunkers routinely forge or block their caller ID.
(2) If you get 5 silent calls in one day, is that 5 calls from the same telejunker? Who knows? Other than *57, which carries a charge (and doesn't release the ANI number to you, only the telco who in turn only releases it to the authorities) there's no way of telling.
(3) Since there's no realistic way of knowing, it absolutely makes sense - to a telejunker, at least - to abuse the anonymity of forged/blocked CID to determine the best time to call someone back with a different CID: this time with a real, in-service phone number.
Sorry to point out the obvious, but:
(1) Telejunkers routinely forge or block their caller ID.
(2) If you get 5 silent calls in one day, is that 5 calls from the same telejunker? Who knows? Other than *57, which carries a charge (and doesn't release the ANI number to you, only the telco who in turn only releases it to the authorities) there's no way of telling.
(3) Since there's no realistic way of knowing, it absolutely makes sense - to a telejunker, at least - to abuse the anonymity of forged/blocked CID to determine the best time to call someone back with a different CID: this time with a real, in-service phone number.
