Simulated response code PBX\Disable his expectations (analog telephony)
Here's the problem: telephone (analogue) does not include the microphone up to confirm (something(?)). Thus there is no possibility to connect in parallel to the already ongoing conversation. Connected according to the scheme "stranding wires".
The question is how to get around that? Sometimes you need to join in the conversation
The machine of the Gigaset C610A C610H handset with. She's called like "barge-in", but regular phones support it by design, and I'm smart got...