Call Charge Metering Or Monitoring Patents (Class 379/114.01)
- Discount charge rate or billing plan (Class 379/121.02)
- Multiple billing account (Class 379/121.03)
- Detail of call history and rates database (Class 379/121.04)
- Having network terminating point receiving registration from subscriber terminal (Class 379/121.06)
- With display (Class 379/122)
- Paystation (e.g., escrow control) (Class 379/123)
- Pulse counting or accumulating (e.g., "message metering") (Class 379/124)
- Manually set (e.g., key and lock) (Class 379/129)