Gsm Timers

Timer Name |Description |Value | |
|T100 RADIO-LINK-TIMEOUT |Detects the presence of the radio link by detecting SACCH frames every |4 SACCH multiframes. That is|
| |480 ms. |1.92 seconds if the SACCH is|
| | |completely absent. |
|T200 Data link timer |Used for re-transmission on the data link. The value varies depending on |155 ms for FACCH |
| |the message type. | |
|T301 Alerting (ringing) |Timer used to limit the amount of time a user has to answer a call. |20 seconds |
|timer | | |
|T303 Mobility Management |Time the network waits after sending a CM SERVICE REQUEST until receiving|10 seconds |
|connection timer |a response. This occurs before initiating call clearing procedures | |
| |towards the MS. | |
|T305 Release timer |Time the network waits after transmitting a DISCONNECT message until |10 seconds |
| |receiving a RELEASE message. | |
|T306 In-band tones release |Time the network waits after transmitting a DISCONNECT message while |10 seconds |
|timer |in-band tones/announcements are provided, until receiving a RELEASE | |
| |message.