Computer call back and the 'ct' command

[Charlie Miller]

A while back I posted an article about having a UNIX host computer
call back someone that had dialed up that computer, ran some
program, and then hung up.  Several people responded with 
reference to a command called 'ct' that is somewhat like tip except
that it spawns getty and login.  I have not been able to find 
any info on this command or where to obtain source for it.  If
anyone knows more about this please email me.

Thanks.

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-Charles E. Miller      Software Engineer
USPS Mail:              High Altitude Observatory
			P.O. Box 3000
			Boulder CO  80307
Internet:               cmiller at hao.ucar.edu
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