AFTER apt-get purge asterisk && apt-get install asterisk :

[Oct  5 18:41:08] NOTICE[5106]: loader.c:1064 load_modules: 1 modules will be loaded.
.[Oct  5 18:41:08] NOTICE[5106]: cdr.c:1471 do_reload: CDR simple logging enabled.
[Oct  5 18:41:08] WARNING[5106]: udptl.c:1388 __ast_udptl_reload: T38FaxUdpEC in udptl.conf is no longer supported; use the t38pt_udptl configuration option in sip.conf instead.
[Oct  5 18:41:08] WARNING[5106]: udptl.c:1391 __ast_udptl_reload: T38FaxMaxDatagram in udptl.conf is no longer supported; value is now supplied by T.38 applications.
[Oct  5 18:41:08] NOTICE[5106]: loader.c:1064 load_modules: 202 modules will be loaded.
[Oct  5 18:41:08] WARNING[5106]: loader.c:393 load_dynamic_module: Error loading module 'res_config_odbc.so': /usr/lib/asterisk/modules/res_config_odbc.so: undefined symbol: ast_odbc_clear_cache
[Oct  5 18:41:08] WARNING[5106]: res_config_pgsql.c:1338 parse_config: Unable to load config res_pgsql.conf
.[Oct  5 18:41:08] NOTICE[5106]: res_smdi.c:1361 load_module: No SMDI interfaces are available to listen on, not starting SMDI listener.
....[Oct  5 18:41:08] NOTICE[5106]: config.c:1957 ast_config_engine_register: Registered Config Engine sqlite
.[Oct  5 18:41:08] NOTICE[5106]: res_odbc.c:1694 load_module: res_odbc loaded.
...[Oct  5 18:41:08] WARNING[5106]: res_config_ldap.c:1586 parse_config: Cannot load configuration res_ldap.conf
[Oct  5 18:41:08] NOTICE[5106]: res_config_ldap.c:1510 load_module: Cannot load LDAP RealTime driver.
..................................SIP channel loading...
[Oct  5 18:41:08] NOTICE[5106]: chan_sip.c:24170 build_peer: The 'username' field for sip peers has been deprecated in favor of the term 'defaultuser'
..[Oct  5 18:41:08] WARNING[5106]: chan_dahdi.c:17134 process_dahdi: Ignoring any changes to 'userbase' (on reload) at line 23.
[Oct  5 18:41:08] WARNING[5106]: chan_dahdi.c:17134 process_dahdi: Ignoring any changes to 'vmsecret' (on reload) at line 31.
[Oct  5 18:41:08] WARNING[5106]: chan_dahdi.c:17134 process_dahdi: Ignoring any changes to 'hassip' (on reload) at line 35.
[Oct  5 18:41:08] WARNING[5106]: chan_dahdi.c:17134 process_dahdi: Ignoring any changes to 'hasiax' (on reload) at line 39.
[Oct  5 18:41:08] WARNING[5106]: chan_dahdi.c:17134 process_dahdi: Ignoring any changes to 'hasmanager' (on reload) at line 47.
........................[Oct  5 18:41:08] WARNING[5106]: utils.c:1535 __ast_string_field_init: trying to reset empty pool
[Oct  5 18:41:08] WARNING[5106]: utils.c:1535 __ast_string_field_init: trying to reset empty pool
[Oct  5 18:41:08] WARNING[5106]: utils.c:1535 __ast_string_field_init: trying to reset empty pool
......[Oct  5 18:41:08] WARNING[5106]: app_voicemail.c:11306 load_config: Failed to load configuration file.
............................................  == Aliased CLI command 'hangup request' to 'channel request hangup'
  == Aliased CLI command 'originate' to 'channel originate'
  == Aliased CLI command 'help' to 'core show help'
  == Aliased CLI command 'pri intense debug span' to 'pri set debug 2 span'
  == Aliased CLI command 'reload' to 'module reload'
...[Oct  5 18:41:08] NOTICE[5106]: config.c:1957 ast_config_engine_register: Registered Config Engine curl
...[Oct  5 18:41:08] NOTICE[5106]: config.c:1957 ast_config_engine_register: Registered Config Engine odbc
.......[Oct  5 18:41:08] NOTICE[5106]: chan_skinny.c:7136 config_load: Configuring skinny from skinny.conf
.........[Oct  5 18:41:08] WARNING[5106]: app_voicemail_imap.c:11308 load_config: Failed to load configuration file.
[Oct  5 18:41:08] WARNING[5106]: pbx.c:5085 ast_register_application2: Already have an application 'VoiceMail'
[Oct  5 18:41:08] WARNING[5106]: pbx.c:5085 ast_register_application2: Already have an application 'VoiceMailMain'
[Oct  5 18:41:08] WARNING[5106]: pbx.c:5085 ast_register_application2: Already have an application 'MailboxExists'
[Oct  5 18:41:08] WARNING[5106]: pbx.c:5085 ast_register_application2: Already have an application 'VMAuthenticate'
[Oct  5 18:41:08] ERROR[5106]: pbx.c:3309 __ast_custom_function_register: Function MAILBOX_EXISTS already registered.