MatVlaar

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  • Sorry to necro a really old thread, but there is a really simple answer to this. A SIP phone using UDP registers with the PBX by sending a SIP REGISTER, if this succeeds, the phone then sits still waiting for 1 of 2 things: 1. the user picks up the handset and starts dialing 2. the PBX sends a SIP INVITE to signal there is…
    in VoIP phones and a recommendation to enable Consistent NAT Comment by MatVlaar August 2023