US Airways (East). 30-50% of reserve lines in each base/seat are "regular" (long call) and the rest are short call. DCA A320 and PHL E190 trend toward the lower end of that ratio, while PHL and CLT 320 are closer to 50/50. Long call is 9 hours to report, but you often get your assignment the afternoon prior. You can be transitioned to short call, and that happens occasionally depending on staffing. They have to give you 9 hours to get to domicile in that case.

Short call requires you to be "90 minutes normal driving time to the parking lot" ... some wiggle room allotted for traffic, etc. You have a 9 hour PT (protected time) rest window each day, the other 15 you're on call. A fixed PT is assigned to each short call block, but it can be changed daily by scheduling, which sometimes happens.

Trips are assigned in "least time" order based on days of availability, to long calls first then to shorts. You can view the entire process in the computer and estimate how likely you are to get a call.

76 hour short call guarantee, 72 hours on long. Breaking guarantee on long call isn't common, breaking it on short is VERY rare. The best way to extra money is DH, which is only paid at 50% PNC, but ABOVE guarantee, so deadheading for dollars is a reserve's friend.

All in all, it is not as good as some places, but a whole lot better than others. It is predictable, and scheduling follows the rules.