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Global Call IP Technology Guide — November 2007
Dialogic Corporation
IP-Specific Event Cause Codes
IPEC_SIPReasonStatus505VersionNotSupported (0x1581, 5505 decimal)
Server Failure Response 505 - Version Not Supported - The server does not support, or refuses
to support, the SIP protocol version that was used in the request. The server is indicating that
it is unable or unwilling to complete the request using the same major version as the client,
other than with this error message.
IPEC_SIPReasonStatus513MessageTooLarge (0x1589, 5513 decimal)
Server Failure Response 513 - Message Too Large - The server was unable to process the
request since the message length exceeded its capabilities.
Global Failure Response Codes (6xx)
IPEC_SIPReasonStatus600BusyEverywhere (0x15e0, 5600 decimal)
SIP Global Failure Response 600 - Busy Everywhere - The callee's end system was contacted
successfully but the callee is busy and does not wish to take the call at this time. The response
may indicate a better time to call in the Retry-After header field. If the callee does not wish to
reveal the reason for declining the call, the callee uses status code 603 (Decline) instead. This
status response is returned only if the client knows that no other end point (such as a voice mail
system) will answer the request. Otherwise, 486 (Busy Here) should be returned.
IPEC_SIPReasonStatus603Decline (0x15e3, 5603 decimal)
SIP Global Failure Response 603 - 603 Decline - The callee's machine was successfully
contacted but the user explicitly does not wish to or cannot participate. The response may
indicate a better time to call in the Retry-After header field. This status response is returned
only if the client knows that no other end point will answer the request.
IPEC_SIPReasonStatus604DoesNotExistAnywhere (0x15e4, 5604 decimal)
SIP Global Failure Response 604 - Does Not Exist Anywhere - The server has authoritative
information that the user indicated in the Request-URI does not exist anywhere.
IPEC_SIPReasonStatus606NotAcceptable (0x15e6, 5606 decimal)
SIP Global Failure Response 606 - Not Acceptable - The user's agent was contacted
successfully but some aspects of the session description such as the requested media,
bandwidth, or addressing style were not acceptable. A 606 (Not Acceptable) response means
that the user wishes to communicate, but cannot adequately support the session described.
The 606 (Not Acceptable) response may contain a list of reasons in a Warning header field
describing why the session described cannot be supported.
A message body containing a description of media capabilities may be present in the response,
which is formatted according to the Accept header field in the INVITE (or application/SDP if
not present), the same as a message body in a 200 (OK) response to an OPTIONS request.
It is hoped that negotiation will not frequently be needed, and when a new user is being invited
to join an already existing conference, negotiation may not be possible. It is up to the
invitation initiator to decide whether or not to act on a 606 (Not Acceptable) response.
This status response is returned only if the client knows that no other end point will answer the
request.
Other SIP Codes (8xx)
IPEC_SIPReasonStatusBYE (0x16a8, 5800 decimal)
SIP reason status 800. BYE code.