I inherited multiple toll-free numbers that terminate to various POTS lines in my switch for our clients to call in on. Some of the POTS lines are programmed as private lines, in which case the PVR key is put on user's phone to answer calls and some are programmed as COT routes that auto-terminate to specific DN which is then programmed as SCR key on user's phone. Is there an advantage/disadvantage to using one method over the other? I'd like to program them all one way or the other. Thanks