Guys,
There are two different timers that could be causing this, but they act a little differently depending on software version.
System > Timers and Limits > Unsupervised CO: [1-255]
Unsupervised CO: Limits the duration of outside calls transferred or forwarded to outside numbers before recalling the primary attendant.
System > Conference-Related Information > Meet-Me Conferencing > Unsupervised CO Conference Timer: [1-255]
Unsupervised CO Conference Timer: After one hour, the system will end a Meet-Me Conference containing only outside parties unless a participant dials “1” when prompted to extend the conference. If extended, this prompt will repeat at an interval determined by the Unsupervised CO Conference timer. The range is 1-255 minutes; the default is 15 minutes. Note that parties will not be prompted within the first hour of a conference. If an internal party joins the conference, the timer is canceled.
This timer however used to act similar to the Unsupervised CO timer when it was first introduced.
Thanks,
TE