Thanks for your time,
The log of / var / log / messages is free of errors, while in the log of / var / log / asterisk / full errors appear at the time of the crash:
[2020-05-12 09:57:20] VERBOSE[936] translate.c: Registered translator ‘opustolin’ from codec opus to slin, table cost, 900000, computational cost 999999
[2020-05-12 09:57:20] VERBOSE[936] loader.c: codec_opus.so => (OPUS Coder/Decoder)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading res_pjproject.so.
[2020-05-12 09:57:20] ERROR[936] res_sorcery_config.c: Unable to load config file ‘pjproject.conf’
[2020-05-12 09:57:20] VERBOSE[936] loader.c: res_pjproject.so => (PJPROJECT Log and Utility Support)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading res_pjsip.so.
[2020-05-12 09:57:20] VERBOSE[936] res_pjsip.c: Local IPv4 address determined to be: 192.168.0.253
[2020-05-12 09:57:52] VERBOSE[936] res_pjsip.c: Local IPv6 address determined to be: fe80::d250:99ff:fe05:8368
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPShowEndpoints
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPShowEndpoint
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] WARNING[936] res_pjsip/config_transport.c: TOS and COS values ignored for websocket transport
[2020-05-12 09:57:52] WARNING[936] res_pjsip/config_transport.c: TOS and COS values ignored for websocket transport
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPQualify
[2020-05-12 09:57:52] VERBOSE[936] loader.c: res_pjsip.so => (Basic SIP resource)
[2020-05-12 09:57:52] VERBOSE[936] loader.c: Loading res_smdi.so.
[2020-05-12 09:57:52] NOTICE[936] res_smdi.c: Unable to load config smdi.conf: SMDI disabled
[2020-05-12 09:57:52] NOTICE[936] res_smdi.c: No SMDI interfaces are available to listen on, not starting SMDI listener.
[2020-05-12 09:57:20] VERBOSE[936] manager.c: Manager registered action SorceryMemoryCacheExpire
[2020-05-12 09:57:20] VERBOSE[936] manager.c: Manager registered action SorceryMemoryCacheStaleObject
[2020-05-12 09:57:20] VERBOSE[936] manager.c: Manager registered action SorceryMemoryCacheStale
[2020-05-12 09:57:20] VERBOSE[936] manager.c: Manager registered action SorceryMemoryCachePopulate
[2020-05-12 09:57:20] VERBOSE[936] loader.c: res_sorcery_memory_cache.so => (Sorcery Memory Cache Object Wizard)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading res_sorcery_realtime.so.
[2020-05-12 09:57:20] VERBOSE[936] sorcery.c: Sorcery registered wizard ‘realtime’
[2020-05-12 09:57:20] VERBOSE[936] loader.c: res_sorcery_realtime.so => (Sorcery Realtime Object Wizard)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading codec_opus.so.
[2020-05-12 09:57:20] VERBOSE[936] format_cache.c: Updated cached format with name ‘opus’
[2020-05-12 09:57:20] ERROR[936] res_sorcery_config.c: Unable to load config file ‘codecs.conf’
[2020-05-12 09:57:20] VERBOSE[936] translate.c: Registered translator ‘lintoopus’ from codec slin to opus, table cost, 600000, computational cost 999999
[2020-05-12 09:57:20] VERBOSE[936] translate.c: Registered translator ‘opustolin’ from codec opus to slin, table cost, 900000, computational cost 999999
[2020-05-12 09:57:20] VERBOSE[936] loader.c: codec_opus.so => (OPUS Coder/Decoder)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading res_pjproject.so.
[2020-05-12 09:57:20] ERROR[936] res_sorcery_config.c: Unable to load config file ‘pjproject.conf’
[2020-05-12 09:57:20] VERBOSE[936] loader.c: res_pjproject.so => (PJPROJECT Log and Utility Support)
[2020-05-12 09:57:20] VERBOSE[936] loader.c: Loading res_pjsip.so.
[2020-05-12 09:57:20] VERBOSE[936] res_pjsip.c: Local IPv4 address determined to be: 192.168.0.253
[2020-05-12 09:57:52] VERBOSE[936] res_pjsip.c: Local IPv6 address determined to be: fe80::d250:99ff:fe05:8368
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPShowEndpoints
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPShowEndpoint
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] WARNING[936] res_pjsip/config_transport.c: TOS and COS values ignored for websocket transport
[2020-05-12 09:57:52] WARNING[936] res_pjsip/config_transport.c: TOS and COS values ignored for websocket transport
[2020-05-12 09:57:52] ERROR[936] res_pjsip_config_wizard.c: Unable to load config file ‘pjsip_wizard.conf’
[2020-05-12 09:57:52] VERBOSE[936] manager.c: Manager registered action PJSIPQualify
[2020-05-12 09:57:52] VERBOSE[936] loader.c: res_pjsip.so => (Basic SIP resource)
[2020-05-12 09:57:52] VERBOSE[936] loader.c: Loading res_smdi.so.
[2020-05-12 09:57:52] NOTICE[936] res_smdi.c: Unable to load config smdi.conf: SMDI disabled
[2020-05-12 09:57:52] NOTICE[936] res_smdi.c: No SMDI interfaces are available to listen on, not starting SMDI listener.
on the other hand I’m going to check the RAM.
Thank you very much for the information