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The following table lists the call disconnect reason code mapping details:
Mapping CPC to SIP cause codes is not permitted for out-of-dialog or relay messages.
For explanations of the reason codes, refer to Call Termination Reason Codes.
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For the blank entries in the SIP column, if they are not specifically listed in the CPC to SIP mapping table, the status code can be retrieved based on the configuration of the parameter unrecAction
in the CPC to SIP mapping table. For more information, refer to the section CPC to SIP Cause Map Profile - CLI.
(a) Disconnect code 6 and 7 are used by certain ISUP variants with the coding standard of CCITT
(b) Disconnect code 14 (DISCONNECT NUMBER PORTED) is a non-standard code for all Ribbon service groups. When the
(c) BYE or CANCEL
(d) 403 if the cause location is "network"; 603 if the cause location is "user".
(e) Disconnect code 22 (NUMBER CHANGED) is a Q.850 standard code. When this code is received by the
(f) Disconnect codes 23, 24, 45, and 51 are used by ANSI variants with the coding standard NATIONAL.
(g) Disconnect code 30 (RESPONSE TO STATUS ENQUIRY) is a Q.850 standard code. When received by the
(h) Disconnect code 129 (CHANNEL COLLISION BACKOFF) is a Ribbon defined code. When generated at the egress
(i) Disconnect code 32 (CALL REJECTED DUE TO FEATURE AT DESTINATION) actually gets sent as cause value 24 when using the coding standard of CCITT for ITU. This value is not supported in the ISDN code, so if it is received the CDR will contain the value 31.
(j) Disconnect code 79 is used for H.323.
(k) Disconnect codes 128, 129, 130, 134, 140, 142, 143, and 148 are mapped to cause value 34 at the ingress side and 47 at the egress side.
(l) Disconnect code 135 is mapped to cause value 31 for EuroISDN and 34 for all other ISDN variants.
(m) Disconnect codes 176 and 177 can be configured to map to any SIP error cause code. By default, they are mapped to SIP cause code 403.
In each of the above cases, the disconnect code that is returned to the preceding switch depends on the type of
If a SILK codec transcoding session is rejected because a SILK license is not available, then the disconnect reason field will include a value of 206.
CDR ingress and egress codec type fields identifies SILK using the existing SILK values for codec type and include the max average bitrate. For example, the entry for SILK 8 would be: P:49:20000 where 49 is the existing numeric identifier for SILK 8 and 20000 is the max average bitrate.
(n) The disconnect reason code configured on the ingress and egress trunk groups is included in the release message independently. This value that is used comes from the configuration of the associated SIP trunk group and not from the CPC to SIP mapping table. For more information refer to SIP TG - Signaling - Post-Dial Delay - CLI.
The following table maps call disconnect reason codes with the CLI zone statistics callFailureCurrentStatistics and callFailureIntervalStatistics. Refer to Show Table Address Context - Zone for statistics details.
The call reason code mapping to callFailureCurrentStatistics / callFailureIntervalStatistics applies to both ingress and egress legs.
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