You could put a delayed-ring Primary Cover button for the Operator ext on ext 115; then the same type of button for ext 115 on ext 140; then repeat for ext 140 on ext 136. You will probably need to change the Transfer Return times to 6+ rings under Options and under Auxiliary Equip, VMS/AA - or the call will never cover back to the Operator's mailbox - in case noone answers.
Tom Daugirdas,
President
STCG, Inc.
stcg.com