site 1 has a sonicwall tz210n setup and site 2 has the cisco wrvs4400n. a site to site vpn is setup and working great for data access. problem i have now is that site 2 voip phones will random display "poor lan connection" throughout the day. site 1 has the main phone system hardware for the two sites to connect to each other so the voip phones on site 2 will work as though it was located at site 1. the logs on my sonicwall doesn't show any disconnection or issues with the vpn. the "poor lan connection" is due to some connection issue from site 2 to site 1. i have been told that the Cisco WRVS4400N has a limited 2-3 mpb over VPN. could this be the issue?
anyone have any suggestion on this issue and any fix / suggestion would be greatly appreciated.