I'm running CUCM 11.5 and firmware 12.0 on a set of Cisco 8851 phones. Barge works great, and cBarge works great. However, no matter what I do, I can't get single button barge to work. Any ideas would be great.
Could you check this,
To enable single button barge for all users, set the single button barge/cBarge Policy to barge. If this parameter is set to Off, configure single button barge for each phone by setting the Single
Button Barge field in Phone Configuration
Also I found a bug affecting 8851 while using 12.0 firmware for barge feature
All of that had already been configured. There is nothing to configure on the phone configuration page except the Built-in bridge, which is globally enabled in the Service Parameters. We aren’t trying to barge while ringing so that bug wouldn’t seem to apply.
What exactly is the behavior ? When call is running on a shared line and then you press the line button on the 8851, what happens ?
It seems like Single Button Barge Feature is not supported on 8851 Phone.
You can cross check that in CUCM unified reporting page. [ as below ]
Unified reporting --> Unified CM Phone feature List -->Generate new report --> Select phone as 8851 and Feature as Single button barge . You wont see that mentioned in the List features table. But if you select some other model phone , say, 7965 or 7941 , you would see that feature in the list.
Hope that helps.