Voip Think- Voice over IP - Asterisk and SER - SIP IAX and H323

3CX VoIP Phone System, IP PBX for Windows
3CX PBX and Phone System for Windows
Download free edition

SEARCH

  • VoIP Protocols
  •    

  • Telephones
  •    

  • QoS (Quality of Service)
  •    

  • Codecs
  •    

  • Asterisk
  •    

  • 3CX PBX
  •    

  • SER (Sip Express Router)
  •    

  • More information
  •    

     

      SIP Protocol  

     
        Architecture   Components   Messages   Error Messages   Headers   Addressing   SDP   Example  
     

     
    SIP Error Messages

    The following table shows the most common errors that can appear in the SIP messages with a detailed explanation.

    As it has been said they match with the following types:

    4xx - Method Failures.
    5xx - Server Failures.
    6xx - Global Failures.

    These SIP error messages can be translated into Q.931 or DSS1 error messages: The SIP errors and the DSS1 and Q.931 errors are mapped as you can see in the following table.

    Table: Mapping between SIP events and DSS1 codes.

    SIP event
    Decimal
    Cause number (DSS1)
    Hex.
    Cause number (DSS1)
    Value as transmitted in D-channel
    Cause
    400 Bad request
    127
    7f
    ff
    Interworking, unspecified
    401 Unauthorized
    57
    39
    b9
    Bearer capability not authorized
    402 Payment required
    21
    15
    95
    Call rejected
    403 Forbidden
    57
    39
    b9
    Bearer capability not authorized
    404 Not found
    1
    01
    81
    Unallocated (unassigned) number
    405 Method not allowed
    127
    7f
    ff
    Interworking, unspecified
    406 Not acceptable
    127
    7f
    ff
    Interworking, unspecified
    407 Proxy authentication required
    21
    15
    95
    Call rejected
    408 Request timeout
    102
    66
    e6
    Recover on Expires timeout
    409 Conflict
    41
    29
    a9
    Temporary failure
    410 Gone
    1
    01
    81
    Unallocated (unassigned) number
    411 Length required
    127
    7f
    ff
    Interworking, unspecified
    413 Request entity too long
    127
    7f
    ff
    Interworking, unspecified
    414 Request URI (URL) too long
    127
    7f
    ff
    Interworking, unspecified
    415 Unsupported media type
    79
    4f
    cf
    Service or option not available
    420 Bad extension
    127
    7f
    ff
    Interworking, unspecified
    480 Temporarily unavailable
    18
    12
    92
    No user response
    481 Call leg does not exist
    127
    7f
    ff
    Interworking, unspecified
    482 Loop detected
    127
    7f
    ff
    Interworking, unspecified
    483 Too many hops
    127
    7f
    ff
    Interworking, unspecified
    484 Address incomplete
    28
    1c
    9c
    Address incomplete (invalid number format)
    485 Address ambiguous
    1
    01
    81
    Unallocated (unassigned) number
    486 Busy here
    17
    11
    91
    User busy
    487 Request cancelled
    127
    7f
    ff
    Interworking, unspecified
    488 Not acceptable here
    127
    7f
    ff
    Interworking, unspecified
    500 Internal server error
    41
    29
    a9
    Temporary failure
    501 Not implemented
    79
    4f
    cf
    Service or option not implemented
    502 Bad gateway
    38
    26
    a6
    Network out of order
    503 Service unavailable
    63
    3f
    bf
    Service or option unavailable
    504 Gateway timeout
    102
    66
    e6
    Recover on Expires timeout
    505 Version not implemented
    127
    7f
    ff
    Interworking, unspecified
    580 Precondition Failed
    47
    2f
    af
    Resource unavailable, unspecified
    600 Busy everywhere
    17
    11
    91
    User busy
    603 Decline
    21
    15
    95
    Call rejected
    604 Does not exist anywhere
    1
    01
    81
    Unallocated (unassigned) number
    606 Not acceptable
    58
    3a
    ba
    Bearer capability not presently available

     

     
     
     
    Spanish   |   About us    |   Contact   |   Collaborate  |   Advertising