we are moving our NOC and i need to figure out how many users we should allow per PRI.
we have 400 users so i need to figure out how many PRI's we'll need. I think i remember reading 5 users per one phone line.
Just wanted to add a note to Sankar and Paolo's good onfo here. The old telco rule is called the "1 in 10" Trunking rule. 1 Trunk/Channel per 10 users. Given the fact that a NOC would probably have a much higher usage rate than your average business your "1 in 5" thought might be perfect. You can always engage your service provider to do a Traffic Study that will also include busyhour averages in your current setup. It is probably good to be over-trunked rather than under-trunked, especially with an environment like yours :)
Hope this helps!