We have some 7911 Phones with CUCM 4.2(3)SR2.
Phone A calls Phone B. Phone B take the call. If a Phones press the "Monitor"-Softkey, the microfon in the headset become the status of dead. Nothing is to hear at the other side. But packets are still received and sent. After press "monitor off" at hte phone, the phones works normal. Is this a known bug? I use SCCP8.3.4 SR1 Firmware.