Hi,
I am testing Paging/Intercom with FreePBX 17 and a Grandstream DP750/DP720 setup.
Environment:
FreePBX 17
DP750 firmware: 1.0.21.33
DP720 firmware: 1.0.19.52
FreePBX sends the following headers correctly:
Call-Info: sip:127.0.0.1;answer-after=0
Alert-Info: http://127.0.0.1;info=alert-autoanswer
On the DP750, I have:
Allow Auto Answer by Call-Info/Alert-Info = Yes
When the SIP account is configured with:
HS Mode = Parallel
the DP750 responds:
100 Trying
180 Ringing
but it never auto-answers or sends 200 OK. After several seconds, FreePBX cancels the call.
However, if I change only the HS Mode from:
Parallel
to:
HS1
Paging auto-answer works immediately and correctly.
I also tested the normal Auto Answer function on the DP720, and that works correctly, so the handset’s auto-answer/speakerphone functionality itself appears to be fine.
Has anyone successfully used FreePBX Paging Auto Answer with a DP750/DP720 while the SIP account is set to HS Mode = Parallel?
Is this a known limitation or firmware issue with the DP750, or is there another setting required for Paging Auto Answer to work in Parallel mode?
Thanks!