3) The billing system can either get traffic data from NMS/EMS, or it can fetch traffic data directly from switches without NMS/EMS as long as it uses the appropriate network management protocol.
4) Telecom servie providers usually won't develop billing system, they buy existing system or pay money to switch provider for impementing the billing system.
I can not tell you in detail, you'd better search SNMP in google and learn more about network managemt protocol and billing system
4) Telecom servie providers usually won't develop billing system, they buy existing system or pay money to switch provider for impementing the billing system.
I can not tell you in detail, you'd better search SNMP in google and learn more about network managemt protocol and billing system