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Incoming 800 number calls from AT&T

Discussion in '3CX Phone System - General' started by rudydm, Mar 17, 2018.

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  1. rudydm

    Jan 31, 2018
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    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 with 407 error. Please help.. Thank you
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