MTP Required forces an MTP to be allocated for all calls. Not checking it guarantees nothing; CUCM may still invoke an MTP if needed, such as DTMF interop (e.g. H.245 alphanumeric to RFC2833), H.323 Fast Start or SIP Early Offer. It's more than just the audio codec.
As for the lack of an MRGL: resources not assigned to at least one MRG are available system-wide.
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...