Call Park BLF key stop working


Hi, Is there anyone who has an idea?
Something the call park BLF botton stop working . When i press the button nothing append .
But if i dial the call park extension its works.

Both last firmware


reboot the phone. The subscription may have been cancelled or lost and needs to be renewed.


yeah i already try that. I have this issue only with grandstream phone , i have a aastra phone … no issue


And did that correct the BLF?


the problem starts again the same day


add parking by dialing #72 during the conversation (or by pressing parking with the virtual keys below the display)


Do you have any alerts set in the UCM such that if the phone loses registration, you will be notified. If not, please set.


make sure the handsets have Force BLF Call-pickup by prefix to Enabled