You go through an intensive 6 week training with set algorithms that are proprietary information, and you do test scenarios with other students/nurses and the instructor. Toward the end of the program, you may start being able to take precepted calls (live call with instructor on the other line) before you are checked off as competent and released on duty. It is an excellent training program, and excellent job if you like it (I liked it for the short time I was there, but due to family issues had to relocate out of State where there was no Kaiser to transfer to).
One of the greatest values I picked up from it is doing triage mentally when faced with any patient care issue (including dealing with my own children's accidents and such at home), and doing the quick rules outs of an "emergent situation" (i.e. chest pain, severe facial swelling) vs urgent situation, when to call 9-1-1 or call the doc stat, etc.
They have statistics for calls, they vary. Some are just calling for appointment resetting, some for general questions, some for lab results, etc. but I believe the target was no more than 8 minutes per call. There is always an MD available (I am not sure on noc shifts), pharmacy too (by phone), supervisors you can flag down when you get the "suicide threat calls"
PROS: Its a sit down job great if you have physical problems, great benefits as Kaiser is known for, no overtime is expected unless you are asked or you volunteer, great pay
CONS: As soon as you log in, you take call after call after call after call until your break, lunch, break, end of shift. There are a few minutes of down time, but rarely, because since Kaiser goes with seniority, when volume is down, there is already a list of people who get to go home first thus sustaining the productivity all around.
That's a quick low down from me