Sometimes clear MS registration/call PDUs exist in encrypted TETRA network:

BS demands authentication: SSI: xxxxxxx
OTAR: OTAR_NEWCELL SSI: xxxxxxx
MS request for registration/authentication ACCEPTED for SSI: xxxxxxx - ITSI attach
OTAR: Key_associate_Demand SSI: xxxxxxx
BS enabled MS: Intent:  Equipment to be enabled:  SSI: xxxxxxx
BS enabled MS: Intent:  Equipment not to be enabled:  TAC: x FAC: x ESN: x SSI: xxxxxxx (V)ASSI: xxxxxxx
SSI:xxxxxxx Call ID:xxxx D_Setup Transmission Request_queued Party_SSI:xxxxxxx Mode_of_Operation:Simplex Hook_method:No hook signalling (direct through-connect) Basic_service:Group_call E2EE Speech_TCH_S Call time-out:nns Modify:Simplex requested

SSI:xxxxxxx Call ID:nnnnn Disconnect_cause:Not_allowed_traffic_case D_Release
SSI:xxxxxxx Call ID:nnn D_Connect_Acknowledge Transmission Not_granted Call time-out:Reserved
SSI:xxxxxxx Call ID:nnnnn D_Call_Restore Transmission Not_granted Call status:Call continue Call time-out:2min
SSI:xxxxxxx Call ID:nnnn Encrypt:Clear D_TX_Granted Transmission Granted
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Called_party_is_under_the_same_DM_GATE_of_the_calling_party D_Release
SSI:xxxxxxx D_Status Pre-coded status #:nnnnn (User defined value)
SSI:xxxxxxx D_TX_Wait
SSI:xxxxxxx D_SDS_Data Type:UDT-4 Length:nn Protocol:User_Defined_nnn DATA: '.......'
SSI:xxxxxxx Call ID:nnnnn D_Call_Proceeding Mode_of_Operation:Simplex Hook_method:No hook signalling (direct through-connect) T301_T302:Predefined Modify:Simplex requested
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Called_party_requires_encryption D_Release
SSI:xxxxxxx Call ID:nnnn Encrypt:E2EE D_TX_Granted Transmission Granted_to_another_user
SSI:xxxxxxx Call ID:nnnnn Encrypt:E2EE D_TX_Interrupt Transmission Granted_to_another_user
SSI:xxxxxxx D_Status Party_SSI:xxxxxxxx Pre-coded status #:nnnn (Reserved value)
SSI:xxxxxxx Call ID:273 D_Info Call status:Reserved Call time-out: x min
SSI:xxxxxxx Call ID:nnnn D_Alert Mode_of_Operation:Duplex Basic_service:Group_call Clear Unprotect_72 T301_T302:60s Modify:Duplex requested
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Call_rejected_by_the_called_party D_Disconnect
SSI:xxxxxxx Call ID:nnnnn Disconnect_cause:Unknown_external_subscriber_identity D_Release
SSI:xxxxxxx Call ID:nnnn D_Setup Transmission Granted Mode_of_Operation:Duplex Hook_method:Hook on/Hook off signalling Basic_service:Point_to_multipoint_Acknowledged Clear Low_Protect_48_1 Call time-out:tt min Modify:Duplex requested
SSI:xxxxxxx Call ID:nnnn Encrypt:Clear D_TX_Granted Transmission Not_granted
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Reserved31 D_Disconnect
SSI:xxxxxxx Call ID:nnnnn Disconnect_cause:Reserved27 D_Disconnect
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Cause_not_defined_or_unknown D_Release
SSI:xxxxxxx Call ID:nnnn Encrypt:E2EE D_TX_Interrupt Transmission Not_granted
SSI:xxxxxxx Call ID:nn Encrypt:Clear D_TX_Granted Transmission Request_queued
SSI:xxxxxxx Call ID:nnnn D_Call_Proceeding Mode_of_Operation:Simplex Hook_method:Hook on/Hook off signalling Basic_service:Individual Clear High_Protect_24_8 Call status:Reserved T301_T302:tt s Modify:Simplex requested
SSI:xxxxxxx Call ID:nnnn D_Connect_Acknowledge Transmission Granted_to_another_user Call time-out:tt min
SSI:xxxxxxx Call ID:nnn0 D_Alert Mode_of_Operation:Simplex Basic_service:Individual E2EE Low_Protect_48_8 T301_T302:t s Modify:Simplex requested
SSI:xxxxxxx Call ID:nnnn D_Setup Transmission Granted Mode_of_Operation:Duplex Hook_method:Hook on/Hook off signalling Basic_service:Group_call E2EE Low_Protect_48_8 Call time-out: t min Modify:Duplex requested
SSI:xxxxxxx Call ID:nnnn Disconnect_cause:Concurrent_setup_not_supported D_Disconnect
SSI:xxxxxxx D_SDS_Data Party_SSI:xxxxxxx Type:UDT-2 Length:32 Data:bbbbbbbbbb
SSI:xxxxxxx Call ID:nnnnn Disconnect_cause:Expiry_of_timer D_Release
SSI:xxxxxxx Call ID:nnn Disconnect_cause:Non_call_owner_requested_disconnection D_Disconnect

MS request for registration/authentication ACCEPTED for SSI: xxxxxxx - Demand location updating
MS request for registration ACCEPTED for SSI: xxxxxxx - Periodic location updating
OTAR: SCK_Reject SSI: xxxxxxx
MS request for registration REJECTED for SSI: xxxxxxx - Migrating location updating CAUSE: Authentication failure (system rejection)
MS request for registration/authentication ACCEPTED for SSI: xxxxxxx (V)ASSI: xxxxxxx - Roaming location updating
MS request for registration/authentication ACCEPTED for SSI: xxxxxxx - Roaming location updating
OTAR: GCK_Reject SSI: xxxxxxx
OTAR: GCK_Provide SSI: xxxxxxx
MS request for registration REJECTED for SSI: xxxxxxx - ITSI attach CAUSE: Illegal MS (system rejection)