Dec 29 19:07:22 WARNING[23265]: pbx_spool.c:252 safe_append: Unable to set utime on /var/spool/asterisk/outgoing/fax.call: Operation not permitted
    -- Attempting call on CAPI/ISDN1/3488866859 for 1@sendfax:1 (Retry 1)
Dec 29 19:07:23 NOTICE[27450]: channel.c:2416 __ast_request_and_dial: Don't know what to do with control frame 15
  == ISDN1: Setting up echo canceller (PLCI=0x201, function=1, options=4, tail=64)
  == ISDN1: Setting up DTMF detector (PLCI=0x201, flag=1)
       > Channel CAPI/ISDN1/3488866859-15 was answered.
  == Starting CAPI/ISDN1/3488866859-15 at sendfax,1,1 failed so falling back to exten 's'
    -- Executing Wait("CAPI/ISDN1/3488866859-15", "3") in new stack
    -- ISDN1: Error setting up echo canceller (PLCI=0x201)
Dec 29 19:07:30 WARNING[23258]: chan_capi.c:3334 show_capi_conf_error: ISDN1: conf_error 0x300b PLCI=0x201 Command=FACILITY_CONF,0x8497
       > CAPI INFO 0x300b: Facility not supported
Dec 29 19:07:33 WARNING[23265]: pbx_spool.c:252 safe_append: Unable to set utime on /var/spool/asterisk/outgoing/fax.call: Operation not permitted
    -- Attempting call on CAPI/ISDN1/3488866859 for 1@sendfax:1 (Retry 1)
    -- Executing SayDigits("CAPI/ISDN1/3488866859-15", "666") in new stack
    -- Playing 'digits/6' (language 'en')
Dec 29 19:07:33 NOTICE[27458]: channel.c:2416 __ast_request_and_dial: Don't know what to do with control frame 15
    -- Playing 'digits/6' (language 'en')
    -- Playing 'digits/6' (language 'en')
    -- Executing Hangup("CAPI/ISDN1/3488866859-15", "") in new stack
  == Spawn extension (sendfax, s, 3) exited non-zero on 'CAPI/ISDN1/3488866859-15'
  == ISDN1: CAPI Hangingup
Dec 29 19:07:34 NOTICE[27450]: pbx_spool.c:280 attempt_thread: Call completed to CAPI/ISDN1/3488866859
       > CAPI INFO 0x3490: Normal call clearing
  == ISDN1: Setting up echo canceller (PLCI=0x301, function=1, options=4, tail=64)
  == ISDN1: Setting up DTMF detector (PLCI=0x301, flag=1)
       > Channel CAPI/ISDN1/3488866859-16 was answered.
  == Starting CAPI/ISDN1/3488866859-16 at sendfax,1,1 failed so falling back to exten 's'
    -- Executing Wait("CAPI/ISDN1/3488866859-16", "3") in new stack
    -- ISDN1: Error setting up echo canceller (PLCI=0x301)
Dec 29 19:07:38 WARNING[23258]: chan_capi.c:3334 show_capi_conf_error: ISDN1: conf_error 0x300b PLCI=0x301 Command=FACILITY_CONF,0x8497
       > CAPI INFO 0x300b: Facility not supported
    -- Executing SayDigits("CAPI/ISDN1/3488866859-16", "666") in new stack
    -- Playing 'digits/6' (language 'en')
    -- Playing 'digits/6' (language 'en')
    -- Playing 'digits/6' (language 'en')
    -- Executing Hangup("CAPI/ISDN1/3488866859-16", "") in new stack
  == Spawn extension (sendfax, s, 3) exited non-zero on 'CAPI/ISDN1/3488866859-16'
  == ISDN1: CAPI Hangingup
Dec 29 19:07:42 NOTICE[27458]: pbx_spool.c:280 attempt_thread: Call completed to CAPI/ISDN1/3488866859
       > CAPI INFO 0x3490: Normal call clearing