I am not very sure why the call drops, but I got some doucments which explain the DID vics. It's the way the DID works, only some of the last digits are passed and not all. For more details please refer the following documents.
Understanding 2 Port Direct Inward Dial (2 DID) Voice Interface Cards
I did have a similar problem once with outbound calls on a T1 configured as E&M trunks dropping after 180 secs. Check the icon beside the line button on your IP phone. Does it show the call connected icon? In my case, the problem ended being with the long distance carrier. I found that they were not sending an off-hook message when the called party answered. A simple option change by them fixed the problem.
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...