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I also had issues downloading both files. I think it might be related to the inactivity timeout. Just keep browsing Cisco Communities while downloading so you don't get logged out. It worked for me.
I'm refering to the instructions in this document.
MGCP Fallback Configuration Example
RemoteSite# configure terminal
RemoteSite(config)# call-manager fallback-mgcp
RemoteSite(config)# application
RemoteSite(config - app)# global
RemoteSite(config - ...