max number of simultaneous sessions / rings / devices?
jentzd:
I've run into an interesting problem, haven't seen posted anywhere else so here goes.
Based on a trial run of 3 Obi 1000 series devices, each registered with the same google voice accounts, I went kind of big time and bought 5 more. 8 total obi devices
Each device is hard wired.
When I had only the 3, they typically received 100% of incoming calls.
With the 8, it seems like only 5-6 ever ring, other weird phenomena happen too (like ringing never stops). The 5 or 6 devices that do ring always seem to be random. In other words, not all incoming calls are going to each of the incoming phones. The phones it does go to seem random (not good).
As a mitigation, I have strategically picked only 5 devices for each line, and kind of mixed the lines through the office. Definitely not ideal. With a max of 5 phones registered with each service, the quality/rings again seems to be consistent (good).
After implementing the mitigation, I came home from the office, registered a 6th device with the same service. Each of the 5 registered accounts at the office + 6th at my house were ringing consistently.
My conclusion is that 5 registered (xmpp) sessions per ip/isp? Is this anywhere close to correct? If so any work arounds? Maybe considering getting a second ISP, second router, putting 5 devices on one router 3 on the other...
I have been using tools like iptraf - do not think this is a QoS issue. Plenty of headroom.
azrobert:
Maybe GV only allows 5 connections from a single public IP. You can try the $6 Simon Telephonics service for the 6th device. I think you can have multiple devices register to the service, but I'm not sure.
https://simonics.com/services/
If that doesn't work, you can use a single GV connection for 2 OBi1000 devices and route calls between them.
jentzd:
Good tips. Might have to do (try) some call routing with google voice..
I tried that with Anveo and was very unhappy. Did not seem to work well passed 3 devices...much more complicated (with obitalk being the incoming ringer, you couldn't see which "real" service / line the call was coming in on). Wonder if this is any easier with GV.
The multiple registrations google voice allowed seemed a easy answer. I just assumed it scaled....
Also going to look at STUN.
Will post the results, regardless. Open to other ideas..
drgeoff:
Yes the Simonics GV gateway permits multiple devices.
http://support.simonics.com/support/solutions/articles/3000031438-what-is-the-sip-login-prefix-
I doubt Session Traversal Utilities for NAT (STUN) has any relevance. NAT traversal issues don't appear to be a problem in this case.
jentzd:
Aren't devices like obi 202 GV to SIP gateways themselves?
When I do iptraf, and receiving a call, I am seeing both a rush of xmpp packets, as well as udp 4500 packets (nat traversal) at the exact moment the 5 phones start to ring. Interestingly, not such a rush once they have been ringing..
That is why I thought STUN might help
https://researchcenter.paloaltonetworks.com/2010/07/nat-traversal-for-voip-calls%E2%80%A6how-stun-helps/
Alternative to that, I saw in the OBI configs you can enter your external IP directly via X_PublicIPAddress...and luckily in my case it is static. Might be the preferred way. X_KeepAliveEnable looks interesting, too
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