800 number

  1. Incoming 800 number calls from AT&T

    Hello, I am trying to configure my on-premise 3CX system to accept 800 number calls from our sip provider AT&T. Their system send 5 zeros plus the 800 to the system. (Example 00000800123456789@IP Address). I had the DID configure with *800 but give a fast busy. Wireshark shows the call rejected...
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