| Index |
| Index of the set of timers which is following up. |
| 0 |
| Timer T0 according to ETSI EN 300 659. Range: 100 to 550 |
| 1 |
| Timer T1 according to ETSI EN 300 659. Range: 45 to 500 |
| 2 |
| Timer T2 according to ETSI EN 300 659. Range: 200 to 500 |
| 3 |
| Timer T3 according to ETSI EN 300 659. Range: 500 to 800 |
| 4 |
| Timer T4 according to ETSI EN 300 659. Range: 45 to 500 |
| 5 |
| Timer T5 according to ETSI EN 300 659. Range: 500 to 2000 |
| 6 |
| Timer T6 according to ETSI EN 300 659. Range: 200 to 3000 |
| 7 |
| Timer T7 according to ETSI EN 300 659. Range: 250 to 700 |
| 8 |
| Timer T8 according to ETSI EN 300 659. Range: 200 to 500 |
| 9 |
| Timer T9 according to ETSI EN 300 659. Range: 0 to 150 |
| 10 |
| Timer T10 according to ETSI EN 300 659. Range: 0 to 150 |
| 11 |
| Timer T11 according to ETSI EN 300 659. Range: 40 to 55 |
| 12 |
| Timer T12 according to ETSI EN 300 659. Range: 55 to 200 |
| 13 |
| Timer T13 according to ETSI EN 300 659. Range: 40 to 120 |
| 14 |
| Timer T14 according to ETSI EN 300 659. Range: 155 to 165 |
| RpAs |
| Timer RP-AS according to ETSI EN 300 659. Range: 200 to 300 |
| DtAsOnH |
| Timer DT-AS on-hook according to ETSI EN 300 659. Range: 90 to 110 |
| DtAsOffH |
| Timer DT-AS off-hook according to ETSI EN 300 659. Range: 75 to 85 |