Thanks for the feedback RonR. I tried something else based on a post by hwittenb in another thread that mentions parameters that can be appended to the speed dial. I've seen mention of them before but didn't know they would be needed and maybe they're really not and something else is going on here. I'm not even sure they are documented in the official manual.
Given Router Netgear RP614 version1
NO ports forwarded to OBi110 and Obi110 1.3.0 (Build: 2651)
SP2:
voip.msVoice Services -> SP2 Service -> X_ServProvProfile: B
ITSP Profile B -> General -> STUNEnable: checked
ITSP Profile B -> General -> STUNServer:
stunserver.orgITSP Profile B -> General -> X_STUNServerPort: 3478
ITSP Profile B -> General -> X_ICEEnable: checked
ITSP Profile B -> General -> X_SymmetricRTPEnable: checked
speed dial: SP2(883510000000091@sip.inum.net;op=imns)
echo works, I hear myself finespeed dial: SP2(883510000000091@sip.inum.net)
still results in dead airI realize this is perhaps throwing the kitchen sink at the STUN/RTP configuration above. Per the post by hwittenb the ";op=imns" in the speed dial specifies i=ice, m=symmetic-rtp, n=natted-address, s=stun. I'm not sure which of the 4 parameters or combination of parameters is fixing the issue. I will test further when I get motivated. Slapping the parameters on the speed dial doesn't address the dead air issue I had on an incoming call through the Netherlands iNum PSTN access number. I have no idea or guess why the Houston iNum gateway seems to work but the Netherlands iNum gateway didn't.
@RonR, do you use port forwarding on your router and/or do you have STUN configured on the OBi and if so, how is your STUN configured? And do you have to use the "op=" parameter in speed dials? My impression, perhaps wrong, is that STUN would be preferable since it doesn't unnecessarily expose ports to the world as port forwarding does.
@hwittenb, thanks for reminding me these options exist.