I am installing a PRI onto a BCM system and am being told that it will always try to grab channel 23 for the first outgoing call if it is set up for descending, regardless if channel 23 is actually working or not. For instance, if I elect to only turn up channels 1 thru 15, it will still try to place the first outgoing call on channel 23, then try 22, then try 21, etc. Is this true, and if it is, is there a work around?