Yeastar S20 was working fine for most of Yeastar until recent latest firmware update (188.8.131.52). Know both inbound/outbound calls drop around the 3 -3:15 minutes.
We are using SIP Trunking, tested with all phones in our office, which are a mix of various brands Yealink T46G, GS GXP2160.
We are hoping that maybe there is a timeout setting or some new check mark somewhere.
Any help is appreciated.