Anonymous Call Blacklist

Discussion in '3CX Phone System - General' started by mukkacow, Nov 14, 2017.

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  1. mukkacow

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    Hello,

    I have a problem for blacklisting some anonymous calls. One of my providers handle anonymous call like this:
    I have set *non* in "Blacklisted numbers" but this seems work only for providers that handle anonymous calls like this:
    Are there any solutions to solve this problem ?
     
  2. sip.bg

    sip.bg Active Member

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    Add Anonymous, anonymous, Unavailable and unavailable, one per line, into blacklist for numbers.
     
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  3. mukkacow

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    Hi @ship.bg,

    It doesn't work. It only works if after sip: you have something (eg. sip:Anonymous@xx.xx.xx.xx). In this case the provider if call is anonymous does't write anything after sip: and the result is that blacklist will not work.

    :-(
     
  4. sip.bg

    sip.bg Active Member

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    Providers usually send 'Anonymous' or 'Unavailable', not an empty string. If string is empty, you don't have criteria to block call.
    Analyse your traffic.
     
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  5. mukkacow

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    When you have a situation like this and you have for eg. anonymous after sip: then you can block it using the "Blacklisted numbers".
    In my case the provider when calls are anonymous doesn't write anything after sip: so there is no way to block it using "Blacklisted numbers".
    In this case noway to block them ?
     
  6. sip.bg

    sip.bg Active Member

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    I'm afraid, not.
     
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  7. mukkacow

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    Thanks you. Will try contact the provider.
     
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