I had a problem with incoming calls
when a call came in.
The GRP2615 picks up and nothing happens
the LED continues to blink and after 7 to 10 seconds the person is online and it’s the same problem with internal calls
the problem and only on the GRP2615 with version 126.96.36.199
I came back with version 188.8.131.52
and the problem disappeared
( Hardware UCM6302 17.8 and GRP2615 184.108.40.206 )