I had the pop settings in both my ATA and voip.ms DID portal set to toronto6, and it's been working fine for weeks if not months. Last week, maybe friday, I was noticing that every 5 or 6 minutes I was losing registration for about 2 minutes, and this was a repeating cycle. I thought it might have something to do with using a new router (Edgerouter ER3) and maybe the NAT-keepalive timing needed some tweaking. I think voip.ms says to use 300 seconds for keep-alive, but I was set for 180. And the ER3 has been in use for more than a week prior to this.
Anyways, in my ATA's (2 of them, SPA112) I changed the POP's to toronto5, and that seemed to help quite a bit. I wasn't seeing registration loss anymore. Outbound calling was working, but I didn't test inbound until today. I try calling in (from another voip.ms did on a separate account) and I get half a ring and then fast busy. I look at inbound call logs and they all show failed. At this point the DID pop's are still toronto6 in the portal. I change them to toronto5 (to match what the ATA's are using) and bingo - incoming calls are getting through.
So I'm wondering if it should have mattered that my ATA's were using toronto5 while the DID account setting was set to toronto6? And by the way, even in that state, voip.ms portal was showing the ATA's were registered and using toronto5.
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