My Voxbone DID (which is mapped to my Voxalot SIP URI) works fine, two-way audio.
NAT
Support
Parameters
Handle VIA [no ] Handle VIA [no ]
received: rport:
Insert VIA [no ] Insert VIA [no ]
received: rport:
Substitute [yes] Send Resp To [no ]
VIA Addr: Src Port:
STUN [yes] STUN Test [no ]
Enable: Enable:
STUN [stun.voxalot.com.au] EXT IP: [ ]
Server:
EXT RTP [ ] NAT Keep [15 ]
Port Min: Alive Intvl:
I recommend changing "Send Resp To" to Yes. Normally it should be Yes if "Substitute VIA Addr" is Yes. That might help.
If not try changing the other four VIA settings to Yes and those two back to No (either the top four should be yes, or the fifth and sixth ones should be yes, not both at once--I am told).
If still no luck, DMZ your PAP.
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