(2) 1616 Phones are losing connection over VPN

[Trilinkcomm]

I'm looking for some advice as to what might be causing this problem. I set up my customer's new office with 5 phones in his office and 2 remote phones (1616 phones) in his house. They work fine for a few days but then they lose their connection randomly. Each time he calls to say the house phones are dead, I'll check the VPN first and verify its up and I can also ping the 2 house phones from his office over the VPN. The only way I can get his phones to reconnect is by rebooting the IP Office. Since he just moved into this office, I thought for some reason it was do to inactivity on his house phones (I know they still shouldn't drop off) but he has been been using them daily lately. It's happened about 4 or 5 times over the last 4 weeks.

The VPN is using Ubiquiti EdgeRouter Lites on both ends and its set up for site-to-site.

Thanks for any advice.

 

[amriddle01]

Bring them local (make it plain routed to retain addresses if necessary), if it doesn't happen then it's the VPN... simple.
Often VPNs will timeout certain traffic but stay up, I've seen it a number of times (router/firewall firmwares have issues, just like IPO's do).
Also seen where routers will hang a session and rebooting the IP Office stops the traffic long enough that it clears down and fixes the issue, this gives the impression the IP Office is at fault, when it isn't.

I suspect you have one of or a combination/variation of these issues, either way I'm 99% sure it the routers/VPN