This is a bug. It was fixed in later IOS. Try loading 12.1(5)T or later. If you can I would suggest 12.2(6a) or later to fix another DSP bug that came out in early 12.2 images. Before you upgrade you may want to verify some things. Do you see any dsp timeout errors? Are you running CRTP?
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...