PSA has a one hour reserve callout...I have attached PSA's 2002 contract for your review.

Air Wisconsin has a two hour callout, but also has Long Call reserve. LC is included only in relief (buildup) lines and goes fairly senior because you know by 6pm two days before if you have to work or not and works GREAT for commuters. Example: LC day on Wednesday, you know by 6pm Monday if you have an assignment Wednesday or not.

LC seems to have mostly disappeared, though...