The International Shared Cost Service (ISCS) enables an ISCS customer in one country to be assigned one or more special telephone numbers in other countries which allow ISCS callers in those countries to call the ISCS customer at a rate equivalent to a national call charge in the country of origin. All other service and call-related charges are paid by the ISCS customer.
This Recommendation provides the service description for the International Shared Cost Service (ISCS), along with information on the service ordering process and other service operational aspects.