Find here some common errors that may appear on your phone voip, softphone, ipbx, mobile voip, etc.

Error 400 «Bad Request» indicates that the query was not understood by the server because it has a syntax error.

Error 401 «Unauthorized » this error indicates that the request requires user authentication. This response is provided by the telephony servers.

Error 402 «Payment Required»

Error 403 «Forbidden » this error indicates that the server has understood the request but refuses to do so. You must contact your voip telephony operator.

Error 404 «Not Found» this error indicates that the server is sure that the user does not exist in the domain specified in the Request-URI.

Error 405 «Method Not Allowed» this error indicates that the specified method has been understood but is not allowed for the address specified in the Request-URI.

Error 406 «Not Acceptable» this error indicates that the resource can only generate responses to unacceptable content.

Error 407 «Proxy Authentication Required» this error indicates that the request requires user authentication. You must enter your username and password.

Error 408 «Request Timeout» this error indicates that the user was not found in the time granted for his request. This error is very common in softphones. Restart the softphone or verify the data of your sip account.

Error 410 «Gone» this error indicates that the user has existed but is no longer available on the server.

Error 413 «Request Entity Too Large» indicates that the request entity is too large.

Error 414 «Request-URI Too Long» this error indicates that the server refuses to process the request because the Request-URI field is longer than it is ready to process.

Error 415 «Unsupported Media Type» this error indicates that the server refuses to process the request because the body of the message is in a format that the server does not support for the required method.

Error 416 «Unsupported URI Scheme» this error indicates that the URI schema in the Request-URI field is unknown to the server.

Error 420 «Bad Extension» this error indicates that the extension does not exist, the server does not understand the request.

Error 421 «Extension Required» this error indicates that the server needs a specific extension that is not in the field of the supported header.

Error 423 «Interval Too Brief» this error indicates that the expiration time of the resource is too short.

Error 424 Bad «Location Information» this error indicates that the location of the content of the query has an incorrect format or is not satisfactory.

Error 428 «Use Identity Header» this error indicates that server rules require an identity header, but this has not been provided.

Error 429 «Provide Referrer Identity» This error indicates that the server did not receive a sponsored text during the request.

Error 430 «Flow Failed» this error indicates that a specific flow for a user has failed, although other flows may succeed.

Error 433 «Anonymity Disallowed» this error indicates that the request was rejected because it was anonymous.

Error 436 «Bad Identity Info» this error indicates that the request has an identity information header and the URI scheme in this header cannot be dereferenced.

Error 437 «Unsupported Certificate» This error indicates that the server could not validate a certificate for the domain that signed the request.

Error 438 «Invalid Identity Header» this error indicates that the server has obtained a valid certificate used to sign an application but has not been able to verify the signature.

Error 439 «First Hop Lacks Outbound Support» this error indicates that the first output proxy does not support the output function.

Error 470 «Consent Needed» this error indicates that the origin of the request did not have the permission of the recipient to make said request.

Error 480 «Temporarily Unavailable» this error indicates that the call is not available.

Error 481 «Call/Transaction Does Not Exist» this error indicates that the server has received a response that does not correspond to any dialog or transaction.

Error 482 «Loop Detected» this error indicates that the server has detected a loop.

Error 483 «Too Many Hops» this error indicates that the Max-Forwards header has reached the value "0".

Error 484 «Address Incomplete» this error indicates that the URI request is incomplete.

Error 485 «Ambiguous» this error indicates that the URI request is ambiguous.

Error 486 «Busy Here» this error indicates that the line you are calling is busy.

Error 487 «Request Terminated» this error indicates that the request has been completed or canceled.

Error 488 «Not Acceptable Here» this error indicates that some aspects of the Request-URI description are not acceptable.

Error 489 «Bad Event» this error indicates that the server did not understand an event package specified in the field of the event header.

Error 491 «Request Pending» this error indicates that the server has pending queries in the same dialog box.

Error 493 «Undecipherable» it contains an encrypted MIME body, which the recipient cannot decipher.

Error 500 «Server Internal Error» this error indicates that the server could not respond to the request due to unexpected conditions.

Error 501 «Not Implemented» this error indicates that the SIP request method is not implemented here.

Error 502 «Bad Gateway» this error indicates that the server received an invalid response from a downline server when trying to respond to a request.

Error 503 «Service Unavailable» this error indicates that the server is inactive due to maintenance or temporarily overloaded and cannot continue with the request.

Error 504 «Server Time-out» This error indicates that the server tried to access another server when trying to process the request and did not receive a quick response.

Error 505 «Version Not Supported» this error indicates that the SIP protocol version of the request is not compatible with the server.

Error 513 «Message Too Large» this error indicates that the length of the request message is longer than the server can handle.

Error 600 «Busy Everywhere» this error indicates that all possible destinations are occupied.

Error 603 «Decline» this error indicates that the destination cannot or will not participate in the call, there is no alternative destination.

Error 604 «Does Not Exist Anywhere» este error indica que el servidor tiene información confiable de que el usuario que realizó la solicitud no existe en ninguna parte.

Error 606 «Not Acceptable» this error indicates that the user's agent was contacted successfully, but some aspects of the description of the session were not accepted.

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