Still, I need new "Conference" button, because of via proxy I change Redirect and then simple redirection doesn't work.

I need don't interrupt active call and join new user to active call.

hm... I have done this by proxy again ;)

I click on extension button with active call, then I click on "Listen and Whisper" button, and FOP2 sends to asterisk:

Action: Originate
Channel: $my_channel
Application: ChanSpy
Data: $selected_extension_channel,w

where, for example

$my_channel=DAHDI/i9/55
$selected_extension_channel=DAHDI/i9/29

To organize conference by connecting user to existing call, I need follow feature in FOP2:
If my extension button with active call, then I type number in "Dial" input, then I click on new "Conference" button, and FOP2 should send to asterisk:

Action: Originate
Channel: Local/$dial_number@from-internal
Application: ChanSpy
Data: $my_channel,B

where, for example

$my_channel=DAHDI/i9/55
$dial_number=591600

The problem was solved by changing "DAHDI/i9" on "SIP" via proxy between FOP2 server and asterisk :shock:

I found, why status doesn't showed:

when I call from SIP phone, registered in FOP2 as SIP/155 in log this string appears:

GET CHANNEL input (SIP/155-00006e9a) - output (SIP/155)

and status of button SIP/155 is shown

but when I call from phone, registered in FOP2 as DAHDI/i9/55 in log this:

GET CHANNEL input (DAHDI/i9/55-71ca) - output (DAHDI/I9)

although must be some, like this

GET CHANNEL input (DAHDI/i9/55-71ca) - output (DAHDI/i9/55)

I sent log to you, are you received it?

autoconfiguration sets such device names:

[DAHDI/i9/55]
type=extension
extension=55
...
bun, when I call from 55 to 591600, the command asterisk -rx "core show channels" shows
...
DAHDI/i9/55-40a3 s@macro-dialout-trun Ring Dial(DAHDI/g2/591600,300,T)
...
and number -40a3 changes from call to call

I have trouble with status of extensions on DAHDI.
I set up much extensions in elastix as DAHDI devices, such as "DAHDI/i9/19", but corresponding buttons don't show status, when I make call to or from extensions.
However status of DAHDI trunks work well, that is, I see on trunks channels and phone numbers.

Sorry for upping this theme, but I have trouble with status of extensions on DAHDI.

I set up much extensions in elastix as DAHDI devices, such as "DAHDI/i9/10" etc, but corresponding buttons don't show their status, when I make call to or from extensions. However status of DAHDI trunks works well, that is, I see channels and phone numbers on trunks.