DND not function on 7975

[lumguanyuan]

I am deploying UC 520 with 11 units of 7975 phones.

There are 4 phones DND not function. when incoming call, user press DND then no response phone still ringing. I verified the ephone and ephonedn configuration all same.

Can someone guide me how to troubleshot this problem? or anybody facing this problem before.

[paolo bevilacqua]

Compare phone FW on the units with the problem, to the ones working OK.

[lumguanyuan]

Hi P.bevilacqua,

Both Cisco phone firmware are same. Is there any other thing i can check.

Lum

[paolo bevilacqua]

Configure DND to another softkey and check again.