The best strategy is to make it as simple as possible for you and your staff to know which COR to assign when administering your system. You can create a unique COR for each type of user or facility, for example, call center agents, account executives, administrative assistants, Wide Area Telecommunications Service (WATS) trunks, or paging zones.
You can also create a unique COR for each type of restriction for example, toll restriction, or outward restriction. If you have a number of people who help you administer your system, using this method would also requires the additional step of explaining where you want to use each type of restriction.
Note:
COR-to-COR calling restrictions from a station to a trunk do not apply when Automatic Alternate Routing (AAR), Automatic Route Selection (ARS), or Uniform Dial Plan (UDP) is used to place the call. In these cases, use Facility Restriction Levels to block groups of users from accessing specific trunk groups. For more information, see Class of Restriction and Facility Restriction Levels in Avaya Aura® Communication Manager Feature Description and Implementation for more information.
To find out what CORs are administered in your system already, type list cor. You can also display information for a single COR by typing list cor #.