TON (Type Of Number)
This value is set for both the originator and destination number in every
SMS. It is used for both
SMS routing and handset display purposes.
The possible TON values are listed below.
| Binary Value | Decimal Value | Name |
| 0 0 0 | 0 | National Numeric |
| 0 0 1 | 1 | International Numeric |
| 0 1 0 | 2 | Shortcode Numeric |
| 0 1 1 | 3 | Network Specific (not used) |
| 1 0 0 | 4 | Subscriber Number (not used) |
| 1 0 1 | 5 | Alphanumeric |
| 1 1 0 | 6 | Abbreviated (not used) |
| 1 1 1 | 7 | Reserved (not used) |