To be able to use "Do not Disturb" you need to set up IPMA. Have a look:
Cisco CallManager Features and Services Guide, Release 4.1(3)
Cisco IP Manager Assistant With Shared Line Support or Proxy Line Support
Cisco IP Manager Assistant (IPMA)
Cisco IP Manager Assistant (IPMA) application allows managers and assistants to handle phone calls more effectively. Each assistant can support up to five manager lines. Managers can enable features, such as Do Not Disturb (DND), Send-All-Calls (SAC), Immediate Divert, Transfer to Voice Mail, Call Intercept, and Set Watch from the softkeys on the IP phone. Assistants can use the Assistant Console application to answer calls for their managers and themselves and to configure manager and assistant preferences.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
Over the last few months, I have had the privilege of working on SI...
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...