Effective September 30, 2026, these products will reach End of Sale and therefore will no longer be available for purchase. Effective September 2028, these products will reach End of Life. After this date, regular updates, maintenance, and technical support will be discontinued in accordance with our product lifecycle policy. For a complete list of the affected SKUs, click HERE. |
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Dialogic IMG - Cause Code Values
Q.931 ISUP Cause Codes
Value | Description |
| Value | Description |
|---|---|---|---|---|
000 | Reserved |
| 053 | Outgoing Calls Barred Within CUG |
001 | Unallocated |
| 054 | Unknown Cause Code |
002 | No Route to Specified Transit Network |
| 055 | Incoming Calls Barred Within CUG |
003 | No Route to Destination |
| 056 | Unknown Cause Code |
004 | Send Special Information Tone |
| 057 | Bearer Capability Not Authorized |
005 | Misdialed Trunk Prefix |
| 058 | Bearer Capability Not Available |
006 | Channel Unacceptable |
| 059 - 061 | Unknown Cause Code |
007 | Call Awarded |
| 062 | Inconsistency b/w access info and sub class |
008 | Preemption |
| 063 | Service of Option Not Available, unspecified |
009 | Preemption - Circuit Reserved for Reuse |
| 064 | Unknown Cause Code |
010 - 015 | Unknown Cause Code |
| 065 | Bearer Capability Not Implemented |
016 | Normal Call Clearing |
| 066 | Channel Type Not Implemented |
017 | User Busy |
| 067 | Unknown Cause Code |
018 | No User Responding |
| 068 | Unknown Cause Code |
019 | No Answer from User |
| 069 | Requested Facility Not Implemented |
020 | Subscriber absent |
| 070 | Restricted Digital Info Bearer Only |
021 | Call Rejected |
| 071 - 078 | Unknown Cause Code |
022 | Number Changed |
| 079 | Service or Option Not Implemented, unspecified |
023 | Unknown Cause Code |
| 080 | Unknown Cause Code |
024 | Unknown Cause Code |
| 081 | Invalid Call Reference Value |
025 | Exchange Routing Error |
| 082 | Identified Channel Does Not Exist |
026 | Non-Selected User Clearing |
| 083 | Call Identity Does Not Exist |
027 | Destination Out of Order |
| 084 | Call Identity In Use |
028 | Invalid Number Format |
| 085 | No Call Suspended |
029 | Facility Rejected |
| 086 | Call Identity Has Been Cleared |
030 | Response to STATUS ENQUIRY |
| 087 | User Not Member of CUG |
031 | Normal, Unspecified |
| 088 | Incompatible Destination |
032 | Unknown Cause Code |
| 089 | Unknown Cause Code |
033 | Unknown Cause Code |
| 090 | Non-existent CUG |
034 | No Circuit/Channel Available |
| 091 | Invalid Transit network Selection |
035 - 037 | Unknown Cause Code |
| 092 | Unknown Cause Code |
038 | Network Out of Order |
| 093 | Unknown Cause Code |
039 | Frame Mode Connection Out of Service |
| 094 | Unknown Cause Code |
040 | Frame Mode Connection Operational |
| 095 | Invalid Message, unspecified |
041 | Temporary Failure |
| 096 | Mandatory Information Element Missing |
042 | Switching Equipment Congestion |
| 097 | Message Type Non-existent or Not Implemented |
043 | Access Information Discarded |
| 098 | Message Not Compatible with Call State |
044 | Requested Circuit/Channel Unavailable |
| 099 | Information Element/Parameter Non-existent |
045 | Unknown Cause Code |
| 100 | Invalid Information Element Contents |
046 | Precedence Call Blocked |
| 101 | Message Not Compatible with Call State |
047 | Resource Unavailable, unspecified |
| 102 | Recovery on Timer Expired |
048 | Unknown Cause Code |
| 103 | Parameter Non-existent or Not Implemented |
049 | Quality of Service Unavailable |
| 104 - 109 | Unknown Cause Code |
050 | Requested Facility Not Subscribed |
| 110 | Message with Unrecognized Parameter |
051 | Unknown Cause Code |
| 111 | Protocol Error, unspecified |
052 | Unknown Cause Code |
| 112 - 254 | Unknown Cause Code |
SIP Request Failure Response Codes (RFC 3261)
Value | Description |
| Value | Description |
|---|---|---|---|---|
400 | Bad Request |
| 482 | Loop Detected |
401 | Unauthorized |
| 483 | Too Many Hops |
402 | Payment Required |
| 484 | Address Incomplete |
403 | Forbidden |
| 485 | Ambiguous |
404 | Not Found |
| 486 | Busy Here |
405 | Method Not Allowed |
| 487 | Request Terminated |
406 | Not Acceptable |
| 488 | Not Acceptable Here |
407 | Proxy Authentication Required |
| 489 | Bad Event |
408 | Request Timeout |
| 491 | Request Pending |
410 | Gone |
| 493 | Undecipherable |
412 | Conditional Request Failed |
| 494 | Security Agreement Required |
413 | Request Entity Too Large |
| 500 | Server Internal Error |
414 | Request-URI Too Long |
| 501 | Not Implemented |
415 | Unsupported Media Type |
| 502 | Bad Gateway |