公开(公告)号：US3458662A

公开(公告)日：1969-07-29

申请号：US3458662D

申请日：1966-07-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAYES RICHARD L ,  MOLLOY PETER E ,  SWANSON RICHARD M

IPC: H04Q3/545 ,  H04M3/00 ,  H04M3/50

CPC classification number: H04Q3/545

公开(公告)号：US3560658A

公开(公告)日：1971-02-02

申请号：US3560658D

申请日：1968-10-18

Applicant: BELL TELEPHONE LABOR INC ,  EDWARD C PIENKOWSKI ,  JAMES B SHEPARD ,  RICHARD M SWANSON ,  ELIZABETH A HOLLOY

Inventor： MOLLOY PETER E

IPC: H04M15/04 ,  H04M15/18

CPC classification number: H04M15/04

Abstract: Equipment is disclosed in a communication switching office for counting the number of trunk circuit usages in a trunk group and after a predetermined number are counted for causing a call data record to be made. Certain trunk circuits of the group are equipped to access call recording circuitry and are controlled by a trunk group sample circuit during the establishment of calls thereover to make the data records which pertain to calls made of the entire group. Circuitry is also provided for indicating the traffic usage rate, or average trunk circuit holding time, and for recording it each time a call usage record is made. The rate information together with the call usage data serves as a basis for charging a calling customer.