Both messages indicate that a device (probably a phone) tried use a resource from one of those lists and was unable to get one.
For a MediaList, examples would be Conferencing, MoH, Transcoders, etc. Check the MRGLs and verify you have devices using correct Media Resources and that they are all registered.
For RouteList, I believe this indicates that a device attempted to make a call and failed because there weren't any ports/channels,etc available to complete the call. So, it matched a Route Pattern, then failed to complete at the gateway. Perhaps you allow 9.xxxxxxxxxx, but you telco requires you to have a 1 (9.1xxxxxxxxxx)?
You should be able to go thru traces and find out by the time, what was trying to allocate that resource and why it failed.
Either case, the result the caller hears is a busy tone.
--Jon
