How to setup CiviCRM for multiple simultaneous telefundraisers?
Something along the lines of


grab some contacts
bulk create Activities for them all (one per each) with the person you want to make those calls as the Assignee
set them up with some Reports (or Drupal Views linked to webforms) that will show each person what Calls are in what Status


Note you may want to create a custom Activity Type with a custom field for the outcome of call (eg busy so callback, etc) and use that field data in combination with the Activity Status to ensure that you have a useful record of which people need trying again etc.

We have worked on developing something along those lines but with more sophistication using Views and Webforms but is only relevant to Drupal installs. This also allowed for folk to 'self-assign' more calls from the pool if they had done their allocation.

There is also the CiviEngage package that comes with the drupal install which you can read about here: https://docs.civicrm.org/user/en/4.7/civic-engagement/what-is-civiengage/