We are currently running 2 UC560 systems. Both systems are almost identical all phonecalls going to AA and next to BACD except one is using SIP trunks only and this system is working fine and second system is using mix of FXO & SIP and on this system phone volume is very low when receiving phonecalls (via FXO or SIP). Does anyone had this kind of problem before? Is there any way to fix this problem?
I have this problem too.