> 3.4.3 | GSM release cause for L3 Radio Resource (RR)

> Number | Description
> 0 | Normal event
> 1 | Abnormal release, unspecified
> 2 | Abnormal release, channel unacceptable
> 3 | Abnormal release, timer expired
> 4 | Abnormal release, no activity on the radio path
> 5 | Pre-emptive release
> 8 | Handover impossible, timing advance out of range
> 9 | Channel mode unacceptable
> 10 | Frequency not implemented
> 65 | Call already cleared
> 95 | Semantically incorrect message
> 96 | Invalid mandatory information
> 97 | Message type non-existent or not implemented
> 98 | Message type not compatible with protocol state
> 100 | Conditional information element error
> 101 | No cell allocation available
> 111 | Protocol error unspecified