rds and billing detail is taken from records that were automatically generated by telephone company equipment. Call billing detail is recorded at a Telephone 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

rds and billing detail is taken from records that were automatically generated by telephone company equipment. Call billing detail is recorded at a Telephone 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