It can be reported each time the subscriber's E-mail activities, demonstrating the need for the number of mail and harmful flow occupied bandwidth.
它可以及时汇报每个订户的电邮活动情况，并显示非需要邮件和有害流量占用了多少带宽。
2
The number of telephone lines connecting the subscriber's terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment.