You can page folks using callup by typing a "g" next to their name.
This goes through the POET Paging system.

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To contact the POET Help Desk, something I had to do 'cause it didn't
have my correct pager number & updating CALLUP, didn't update the POET
data base (boo!), you can call 1-888-IBM-HELP
                            or 1-888-426-4357, options 5,2,3.

Another possible way to contact the POET folks, is send e-mail to
POETHELP@voicerite.com.  This address was culled from a piece of VM mail
I got when I tried sending a page from CALLUP, to somebody that wasn't
in the POET system.