hi guys i had a customer call and they got an 824 from someone else. well bad caps in the software and when power goes off they loose programing. i had to go program it for them. they want it to get an unused line when they go off hook. i used a pool and when they go off hook they get the highest line in the pool. the lady says before they lost programing it would start with line one. can it be in a pool and give line one first if its not being used, and if its used go to line two rather than starting at the highest line. thanks dave