Knowledgebase: Explorer
Explorer, sailor: Error 1801
Posted by Ove C. Nielsen on 31 August 2012 09:01 AM
Error 1801 system can not register:

Most likely cause of failure is the HPA.
Terminal tries to register but RAN never receives the request do to the no Tx. Therefor the terminal never gets a response from RAN, and will start the registering  again and again and again. 

Error 1801:
1800-1805: Register PS failed - umts-reg - Registration for data failed - The terminal has not yet been allowed register for data services (Packet Switched).

Example from Diagnostic report:

debug:/$ eventhandler -l
Event log: 
Time [id subid unit] (severity state occurence) text
Thu Aug 30 08:56:13 2012 [08022 0 1  ] (INFO    ON      1) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:56:17 2012 [08027 0 1  ] (INFO    NONE    1) EV_BDU_AL_REGM_HANDOVER (4)
Thu Aug 30 08:56:17 2012 [08028 0 1  ] (INFO    NONE    1) EV_BDU_AL_REGM_CAMPED_ON_PSAB
Thu Aug 30 08:56:17 2012 [08022 0 1  ] (INFO    OFF     1) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:56:17 2012 [08023 0 1  ] (INFO    ON      1) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:56:17 2012 [08023 0 1  ] (INFO    OFF     1) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:56:17 2012 [08024 0 1  ] (INFO    ON      1) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:56:47 2012 [08029 0 1  ] (INFO    NONE    1) EV_BDU_AL_REGM_SILENT_DEREG
Thu Aug 30 08:56:47 2012 [08024 0 1  ] (INFO    OFF     1) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:56:47 2012 [08021 0 1  ] (INFO    ON      1) EV_BDU_AL_REGM_IDLE
Thu Aug 30 08:56:47 2012 [08021 0 1  ] (INFO    OFF     1) EV_BDU_AL_REGM_IDLE
Thu Aug 30 08:56:47 2012 [08022 0 1  ] (INFO    ON      2) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:56:49 2012 [01800 1 1  ] (WARNING ON      1) ALARM_PS_REGISTER_FAILED
Thu Aug 30 08:56:51 2012 [08028 0 1  ] (INFO    NONE    2) EV_BDU_AL_REGM_CAMPED_ON_PSAB
Thu Aug 30 08:56:51 2012 [08022 0 1  ] (INFO    OFF     2) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:56:51 2012 [08023 0 1  ] (INFO    ON      2) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:56:51 2012 [08023 0 1  ] (INFO    OFF     2) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:56:51 2012 [08024 0 1  ] (INFO    ON      2) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:57:21 2012 [08029 0 1  ] (INFO    NONE    2) EV_BDU_AL_REGM_SILENT_DEREG
Thu Aug 30 08:57:21 2012 [08024 0 1  ] (INFO    OFF     2) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:57:21 2012 [08021 0 1  ] (INFO    ON      2) EV_BDU_AL_REGM_IDLE
Thu Aug 30 08:57:21 2012 [08021 0 1  ] (INFO    OFF     2) EV_BDU_AL_REGM_IDLE
Thu Aug 30 08:57:21 2012 [08022 0 1  ] (INFO    ON      3) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:57:25 2012 [08028 0 1  ] (INFO    NONE    3) EV_BDU_AL_REGM_CAMPED_ON_PSAB
Thu Aug 30 08:57:25 2012 [08022 0 1  ] (INFO    OFF     3) EV_BDU_AL_REGM_SEARCHING_FOR_NETWORK
Thu Aug 30 08:57:25 2012 [08023 0 1  ] (INFO    ON      3) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:57:25 2012 [08023 0 1  ] (INFO    OFF     3) EV_BDU_AL_REGM_NETWORK_FOUND
Thu Aug 30 08:57:25 2012 [08024 0 1  ] (INFO    ON      3) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:57:55 2012 [08029 0 1  ] (INFO    NONE    3) EV_BDU_AL_REGM_SILENT_DEREG
Thu Aug 30 08:57:55 2012 [08024 0 1  ] (INFO    OFF     3) EV_BDU_AL_REGM_REGISTERING
Thu Aug 30 08:57:55 2012 [08021 0 1  ] (INFO    ON      3) 
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