Carrier preselect
Carrier preselect is a term relating to the telecommunications industry. It is a method of routing calls for least-cost routing without the need for programming of PBX telephone system.
This is the process whereby a telephone subscriber whose telephone line is maintained by one company, usually a former monopoly provider, can choose to have some of their calls automatically routed across a different telephone company's network without needing to enter a special code or special equipment.
