Hello,
We are testing some Fanvil and Akuvox video doorbells and trying to get the Video Preview to work on a Yealink phone while the call is still ringing.
As soon as we press ‘preview’ on the phone, we see that the phone sends to Asterisk a 183 with an SDP, but Asterisk does not “forward” the request to the doorbell.
We have tried enabling inband_progress = yes on the doorbell endpoint, but no luck…
What are we missing?
Thanks
Interesting. Thanks Josh.
So I guess the only way to have this working is by doing IP to IP calling.
Is there even a possibility for this to work with direct media? Or Asterisk must be involved with the initial stream setup?
If anyone does it differently, please speak up. Thank you 
One endpoint. 5507 (the doorbell) dials 66413 (the Yealink phone)
See the call log:
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@macro-dial-one:54] Dial("PJSIP/5507-00000005", "PJSIP/66413/sip:[email protected]:5060,,HhTtrb(func-apply-sipheaders^s^1)") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_stack.c: PJSIP/66413-00000006 Internal Gosub(func-apply-sipheaders,s,1) start
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@func-apply-sipheaders:1] NoOp("PJSIP/66413-00000006", "Applying SIP Headers to channel PJSIP/66413-00000006") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@func-apply-sipheaders:2] Set("PJSIP/66413-00000006", "TECH=PJSIP") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@func-apply-sipheaders:3] Set("PJSIP/66413-00000006", "SIPHEADERKEYS=") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@func-apply-sipheaders:4] While("PJSIP/66413-00000006", "0") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_while.c: Jumping to priority 10
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] pbx.c: Executing [s@func-apply-sipheaders:11] Return("PJSIP/66413-00000006", "") in new stack
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_stack.c: Spawn extension (from-internal, 66413, 1) exited non-zero on 'PJSIP/66413-00000006'
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_stack.c: PJSIP/66413-00000006 Internal Gosub(func-apply-sipheaders,s,1) complete GOSUB_RETVAL=
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_dial.c: Called PJSIP/66413/sip:[email protected]:5060
[2022-08-19 12:05:53] VERBOSE[3479170][C-00000004] app_dial.c: PJSIP/66413-00000006 is ringing
[2022-08-19 12:05:56] VERBOSE[3479170][C-00000004] app_dial.c: PJSIP/66413-00000006 is making progress passing it to PJSIP/5507-00000005
But from what we see, it doesn’t actually pass it to 5507
Hi David, thanks for your response.
Not sure I fully understand this. Are you saying that if we see in the log PJSIP/66413-00000006 is making progress passing it to PJSIP/5507-00000005 it means that “something” (like inband_progress) has done the early bridges?
If you are referring to the dates of the logs I have posted above, it is from the past Friday.
Thinking if it is worth a shot trying this with chan_sip…
Thanks
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