Definitions
| SMS | Short Message Service ? Short message service or written message service. |
| SMSC | Short Message Service Center ? Message Center. |
| Sent SMS | Total number of SMS sent. |
| Received at the SMSC: | Number of successful SMS sent, i.e., the message was received at the Message Center. |
| Not received at the SMSC: | The message did not reach the message center, i.e., there was an unsuccessful attempt to use the service. |
| Delivered SMS | Total number of SMS received at the destination terminal, excluding doubled SMS. |
| Error Free: | SMS Number of SMS received at the destination terminal, excluding doubled SMS. |
| Error SMS: | Number of SMS received at the destination terminal, excluding doubled SMS, with at least one wrong bit. |
| Not delivered SMS: | Total number of SMS sent but not received at the destination terminal. |
| SMS delivery time above 175 s: | Number of SMS received at the destination terminal, with a delivery time above 175 seconds. |
| Doubled SMS | Number of SMS received in double by the destination terminal. |
| SMS Delivery Time | Time elapsing between the SMS sending by the origination terminal and its reception by the destination terminal. |
| Minimum: | Minimum registered delivery time. |
| Average: | Average delivery time. |
| Maximum: | Maximum registered delivery time. |
