ne Company Central Office Switch at the time of the event. The billing detail is electron- ically transmitted at AT&T CALIFORNIA's Billing Centers. The Billing Centers store the billing data in their computers. On a scheduled basis, the Billing Centers generate bills for each subscriber account. Subscriber data is

ne Company Central Office Switch at the time of the event. The billing detail is electron- ically transmitted at AT&T CALIFORNIA'S Billing Centers. The Billing Centers store the billing data in their computers. On a scheduled basis, the Billing Centers generate bills for each subscriber account. Subscriber data is