Hi,
As you see in your document since version 5.0 no need MTP for SIP trunk.
Easy way to do it:
CUCM -- SIP trunk/or H323 -- CUBE -- SIP -- SIP provider
Sample config from CUBE:
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
sip
!
sip-ua
credentials username xxx password yyy realm sip.provider
authentication username xxx password yyy
registrar dns:sip.provider expires 3600
sip-server dns:sip.provider
Remember you have to add dial-peer on CUBE and SIP trunk from CUCM to CUBE.