Silent Calls on landline numbers

Hello,

Im a server administrator and new in asterisk. At this moment there is a persisting problem on our servers. all landline numbers wont connect, having silent calls. I already checked on our provider as well as our system which we didnt made changes for it was working ever since.

Below are some logs that might help

 -- No one is available to answer at this time (1:0/0/0)
    -- Executing [399196441515381227@default:4] Hangup("Local/8600051@default-0000133c;1", "") in new stack
  == Spawn extension (default, 399196441515381227, 4) exited non-zero on 'Local/8600051@default-0000133c;1'
    -- Executing [h@default:1] AGI("Local/8600051@default-0000133c;1", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16-----NOANSWER----------") in new stack
    -- <Local/8600051@default-0000133c;1>AGI Script agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16-----NOANSWER---------- completed, returning 0
  == Spawn extension (default, 8600051, 1) exited non-zero on 'Local/8600051@default-0000133c;2'
    -- Executing [h@default:1] AGI("Local/8600051@default-0000133c;2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0---------------") in new stack
    -- <Local/8600051@default-0000133c;2>AGI Script agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0--------------- completed, returning 0
  == Manager 'sendcron' logged on from 127.0.0.1
  == Manager 'sendcron' logged on from 127.0.0.1
  == Spawn extension (default, 58600051, 1) exited non-zero on 'Local/58600051@default-0000133d;2'
    -- Executing [h@default:1] AGI("Local/58600051@default-0000133d;2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0---------------") in new stack
    -- <Local/58600051@default-0000133d;2>AGI Script agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0--------------- completed, returning 0
  == Spawn extension (default, 8309, 3) exited non-zero on 'Local/58600051@default-0000133d;1'
    -- Executing [h@default:1] AGI("Local/58600051@default-0000133d;1", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0---------------") in new stack
    -- <Local/58600051@default-0000133d;1>AGI Script agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0--------------- completed, returning 0


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== Manager 'sendcron' logged on from 127.0.0.1
    -- Executing [8600051@default:1] MeetMe("Local/8600051@default-00001343;2", "8600051,F") in new stack
       > Channel Local/8600051@default-00001343;1 was answered.
    -- Executing [399196441732453223@default:1] AGI("Local/8600051@default-00001343;1", "agi://127.0.0.1:4577/call_log") in new stack
    -- AGI Script Executing Application: (EXEC) Options: (Set(_CAMPCUST=OPERATIO))
    -- <Local/8600051@default-00001343;1>AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
    -- Executing [399196441732453223@default:2] Set("Local/8600051@default-00001343;1", "CALLERID(all)=442030343196 <442030343196>") in new stack
    -- Executing [399196441732453223@default:3] Dial("Local/8600051@default-00001343;1", "SIP/AWT/999441732453223,,tT") in new stack
  == Using SIP RTP CoS mark 5
    -- Called SIP/AWT/999441732453223