I do have 3 Grandstream GXP1780 ip telephones.
The telephone system is a be.ip Plus from Elmeg.
When I have an incoming call, I can see that somebody is calling me due to red LED flashing, but I cannot hear a ring-tone on each of the phones.
where will i have to activate the ring tone ? in menu “settings” the standard ringtone is selected. The volume is set to “6” - high.
Thanks for help in advance.