Wake-up calls over sip trunk

Hi, im trying to get the wake-up call function to work over sip trunk to a CUCM.
whenever i dial in, i get this message: this number is not in use.

the feature works great with a local sip client.

Thanks Petter

@p3tter Please do the following from linux shell:

asterisk -rvvvvvvvvv
< reproduce issue >

Copy the resulting scrollback to pastebin.com. Copy that link here.