The call on hold reminder is set for 60 seconds and is not adjustable....and will not ring back. Maybe you need to try the park feature. There are eight park codes in the system that are used by the operator. The amount of time they ring back to that operator is adjustable from 10 to 300 seconds in increments of 10. If this particular console does not have a DSS attached to it you could program the park buttons on the line buttons and call them park 1, park 2, etc. You could consider splitting the codes between two consoles letting each have four codes each??? lg