When our primary Internet connection fails and VPN applicance switches to cellular backup, we cannot make/receive calls without rebooting base unit of Yealink W52P. We have Aastra 6757 SIP phone and we do not have to reboot that phone. IP PBX is cloud-based Ring Central. No other host devices/clients have to be rebooted when we fail over to Cellular - just the W52P. Any ideas?
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