Call Disconnect Code Mapping

Additional section:

Mapping CPC to SIP cause codes is not permitted for out-of-dialog or relay messages.

Call Disconnect Code Mapping

Disconnect Code Received	Enumeration	Standards			Disconnect Code Stored in CDR when Disconnect Initiated by Service Type:
Disconnect Code Received	Enumeration	Q.931	Q.850	GR-317	ISUP	ISDN	H.323	SIP
0	CPC_INVALID_DISC_REASON				31	16	127	500
1	CPC_DISC_UNALLOCATED_NUMBER	P	P	P	1	1	1	404
2	CPC_DISC_NO_ROUTE_TO_SPECIFIED_TRANSIT_NETWORK		P		2	2	2	404
3	CPC_DISC_NO_ROUTE_TO_DESTINATION	P	P	P	3	3	3	404
4	CPC_DISC_SEND_SPECIAL_INFO_TONE		P		4	4	4	500
5	CPC_DISC_MISDIALED_TRUNK_PREFIX		P		5	5	5	500
6 (a)	CPC_DISC_CHANNEL_UNACCEPTABLE	P	P		31	31	6	500
7 (a)	CPC_DISC_CALL_AWARDED		P		31	31	7	500
8	CPC_DISC_PREEMPTION		P		8	8	8	500
9	CPC_DISC_PREEMPTION_CIRCUIT_RESERVED		P		9	9	9	500
14	CPC_DISC_NUMBER_PORTED		(b)		14	31	14	500
16	CPC_DISC_NORMAL_CALL_CLEARING	P	P	P	16	16	16	(c)
17	CPC_DISC_USER_BUSY	P	P	P	17	17	17	486
18	CPC_DISC_NO_USER_RESPONDING	P	P		18	18	18	408
19	CPC_DISC_NO_ANSWER_FROM_USER	P	P		19	19	19	480
20	CPC_DISC_SUBSCRIBER_ABSENT		P		20	20	20	480
21	CPC_DISC_CALL_REJECTED	P	P	P	21	21	21	(d)
22	CPC_DISC_NUMBER_CHANGED	P	P	P	22	22	22	(e)
23 (f)	CPC_DISC_UNALLOCATED_DEST_NUMBER		P	P	23	31	23	410
24 (f)	CPC_DISC_UNKNOWN_BUSINESS_GROUP		*		31	31	24	500
25	CPC_DISC_EXCHANGE_ROUTING_ERROR		P		25	31	25	500
26	CPC_DISC_MISROUTED_CALL_TO_PORTED_NUMBER		P		26	26	26	404
27	CPC_DISC_DESTINATION_OUT_OF_ORDER	P	P	P	27	27	27	502
28	CPC_DISC_INVALID_NUMBER_FORMAT	P	P	P	28	28	28	484
29	CPC_DISC_FACILITY_REJECTED		P		29	29	29	501
30 (g)	CPC_DISC_RESPONSE_TO_STATUS_ENQUIRY		P		31	31	30	500
31	CPC_DISC_NORMAL_UNSPECIFIED	P	P	P	31	31	31	480
32	CPC_DISC_CALL_REJECTED_DUE_TO_FEATURE_AT_DESTINATION		P		32	32		433
34	CPC_DISC_NO_CIRCUIT_AVAILABLE	P	P	P	34	34	34	503
38	CPC_DISC_NETWORK_OUT_OF_ORDER	P	P		38	38	38	503
39	CPC_DISC_PERM_FM_CONNECTION_OOS		P		47	47	39	500
40	CPC_DISC_PERM_FM_CONNECTION_OPERATIONAL		P		47	47	40	500
41	CPC_DISC_TEMPORARY_FAILURE	P	P	P	41	41	41	503
42	CPC_DISC_SWITCHINGEQUIP_CONGESTION	P	P	P	42	47	42	503
43	CPC_DISC_ACCESS_INFORMATION_DISCARDED		P		43	43	43	500
44	CPC_DISC_REQUESTED_CIRCUIT_NOT_AVAILABLE	P	P		44	44	44	500
45 (f)	CPC_DISC_ANSI_PREEMPTION				47	47	45	500
46	CPC_DISC_PRECEDENCE_CALL_BLOCKED		P		46	46	46	500
47	CPC_DISC_RESOURCE_UNAVAILABLE_UNSPECIFIED	P	P	P	47	47	47	503
49	CPC_DISC_QUALITY_OF_SERVICE_UNAVAIL	P	P		63	63	49	500
50	CPC_DISC_REQUESTED_FACILITY_NOT_SUBSCRIBED		P		50	50	50	500
51 (f)	CPC_DISC_CALL_TYPE_INCOMPATIBLE_WITH_SERVICE				63	63	51	500
53	CPC_DISC_OUTGOING_CALL_BARRED_CUG		P		53	53	53	500
54	CPC_DISC_CALL_BLOCKED_GROUP_RESTRICTIONS				63	63	54	500
55	CPC_DISC_INCOMING_CALL_BARRED_CUG		P		55	55	55	403
57	CPC_DISC_BEARER_CAP_NOT_AUTHORIZED	P	P		57	57	57	403
58	CPC_DISC_BEARER_CAP_PRESENTLY_NOT_AVAILABLE	P	P		58	58	58	503
62	CPC_DISC_INCONSISTENT_OUTGOING_SUBSCRIBER_CLASS		P		62	62	62	500
63	CPC_DISC_SERVICE_OR_OPTION_NOT_AVAILABLE_UNSPECIFIED	P	P		63	63	63	500
65	CPC_DISC_BEARER_CAP_NOT_IMPLEMENTED	P	P		65	65	65	488
66	CPC_DISC_CHANNEL_TYPE_NOT_IMPLEMENTED	P	P		79	79	66	500
69	CPC_DISC_REQUESTED_FACILITY_NOT_IMPLEMENTED		P		69	69	69	500
70	CPC_DISC_ONLY_RESTRICTED_DIGITAL_INFO_BEARER_CAP_AVAIL		P		70	70	70	488
79 (j)	CPC_DISC_SERVICE_OR_OPTION_NOT_IMPLEMENTED_UNSPECIFIED	P	P		79	79	79	501
81	CPC_DISC_INVALID_CALL_REFERENCE	P	P		95	95	81	500
82	CPC_DISC_CHANNEL_DOES_NOT_EXIST	P	P		95	95	82	500
83	CPC_DISC_SUSPENDED_CALL_NO_INDENTITY		P		95	95	83	500
84	CPC_DISC_CALL_IDENTITY_IN_USE		P		95	95	84	500
85	CPC_DISC_NO_CALL_SUSPENDED		P		95	95	85	500
86	CPC_DISC_CALL_IDENTITY_CLEARED		P		95	95	86	500
87	CPC_DISC_NOT_MEMBER_OF_CUG		P		87	87	87	403
88	CPC_DISC_INCOMPATIBLE_DESTINATION	P	P	P	88	88	88	503
90	CPC_DISC_NON_EXISTENT_CUG		P		90	90	90	500
91	CPC_DISC_INVALID_TRANSIT_NETWORK_SELECTION		P	P	91	91	91	500
95	CPC_DISC_INVALID_MESSAGE_UNSPECIFIED	P	P	P	95	95	95	500
96	CPC_DISC_MANDATORY_INFORMATION_ELEMENT_MISSING	P	P		111	96	96	500
97	CPC_DISC_MSG_TYPE_NON_EXISTENT_OR_NOT_IMPLEMENTED	P	P	P	97	97	97	500
98	CPC_DISC_MSG_TYPE_NC_NE_OR_NI	P	P		111	111	98	500
99	CPC_DISC_IE_NOT_IMPLEMENTED	P	P	P	99	99	99	500
100	CPC_DISC_INVALID_INFORMATION_ELEMENT_CONTENT	P	P		111	100	100	500
101	CPC_DISC_MSG_NOT_COMPATIBLE_WITH_STATE	P	P		111	111	101	500
102	CPC_DISC_RECOVERY_ON_TIMER_EXPIRY	P	P	P	102	102	102	504
103	CPC_DISC_PARAMETER_NOT_IMPLEMENTED		P	P	103	103	103	500
110	CPC_DISC_UNRECOGNIZED_PARAMETER		P		110	110	110	500
111	CPC_DISC_PROTOCOL_ERROR_UNSPECIFIED	P	P	P	111	111	111	500
127	CPC_DISC_INTERWORKING_UNSPECIFIED	P	P	P	127	127	127	500
Sonus Extension
128 (k)	CPC_DISC_RES_AL_FAIL				34	34	47	488
129 (h)(k)	CPC_DISC_CHAN_COLL_BACKOFF				34	16	47	500
130 (k)	CPC_DISC_INSUFF_DEST_RESOURCES				34	16	47	500
131	CPC_DISC_RESOURCE_FAILURE				41	47	47	500
132	CPC_DISC_MODULE_FAILURE				41	16	41	500
133	CPC_DISC_MGSG_EGRESS_DISC				31	16	31	500
134 (k)	CPC_DISC_CHAN_COT_FAIL_BACKOFF				34	16	47	500
135 (l)	CPC_DISC_COLL_REATTEMPT_EXHASTD				41	34	47	500
136	CPC_DISC_COT_REATTEMPT_EXHASTD				31	16	47	500
137	CPC_DISC_NO_ROUTE_BEARER_CAP				63	63	31	500
138	CPC_DISC_NO_ROUTE_SIGNALING				3	3	31	500
139	CPC_DISC_NO_ROUTE_DIRECTION				3	3	31	500
140 (k)	CPC_DISC_CEP_RES_AL_FAIL				34	16	47	500
141	CPC_DISC_WITH_NEW_DESTINATION				31	16	31	500
142 (k)	CPC_DISC_ACC_PROCEDURE				34	16	47	500
143 (k)	CPC_DISC_ACC_ALT_ROUTE				34	16	47	500
144	CPC_DISC_PACKET_LOSS_EXCEEDES_THRESHOLD				31	16	41	500
145	CPC_DISC_NO_RTP_OR_RTCP_PACKETS				31	16	41	500
146	CPC_DISC_HOP_COUNTER_EXHAUSTED				25	16	31	500
147	CPC_DISC_CONVERSION_FAILURE				31	16	127	500
148 (k)	CPC_DISC_CONGESTION_REROUTE_NOT_PERMITTED				34	16	127	500
149	CPC_DISC_GSX_INCOMPATIBLE_DESTINATION				3	3	3	404
150	CPC_DISC_NO_PSX_ROUTE				3	3	3	404
151	CPC_DISC_SETUP_REQ_TIMER_EXPIRY				102	102	102	504
152	CPC_DISC_GW_CONGESTED				42	42	42	503
153	CPC_DISC_GLARE_OCCURRED				31	16	127	500
154	CPC_DISC_NO_TERM_CIT_RCVD				41	16	127	500
155	CPC_DISC_BUSY_EVERYWHERE				31	16	127	600
156	CPC_DISC_REASON_UNKNOWN_RESOURCE_PRIORITY				31	16	127	417
157	CPC_DISC_REASON_BAD_EXTENSION				31	16	127	420
158	CPC_DISC_REASON_QUEUE_TIMEOUT				31	16	127	408
159	CPC_DISC_REASON_FORBIDDEN				31	16	127	403
160	(Reserved for future use)
161	CPC_DISC_REASON_QUEUEING_IMPOSSIBLE				34	34	34	503
176 (m)	CPC_DISC_TG_AUTH_FAIL				21	21	21	403
177 (m)	CPC_DISC_TG_AUTH_FAIL_401_407				21	21	21	403

(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 Sonus service groups. When GSX software receives this code, the Call Disconnect Reason field of STOP or ATTEMPT Call Data Record (CDR) is set to received code of 14 by ISUP and H.323 service handlers. ISDN service groups set the field to 31 (NORMAL UNSPECIFIED). The SIP signaling service does not recognize this code and sets the field to 500 (SERVER INTERNAL ERROR).

(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 GSX software, the Call Disconnect Reason field of the ATTEMPT CDR is set to receive code 22 by ISUP, ISDN, and H.323 service handlers. The SIP signaling service looks for information in the diagnostic field about a new number where the called party may be reachable. If this information is found, it is added to the Contact header of the SIP response and the Call Disconnect Reason field is set to 301 (MOVED PERMANENTLY); if this information is not present, the field is set to 410 (GONE).

(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 GSX software, the Call Disconnect Reason field of STOP or ATTEMPT CDR is set to receive code 30 by ISUP and H.323 service handlers. ISDN service groups set the field to 31 (NORMAL UNSPECIFIED). SIP signaling service does not recognize this code, and sets field to 500.

(h) Disconnect code 129 (CHANNEL COLLISION BACKOFF) is a Sonus defined code. When generated at the egress GSX, the code tries to find another circuit/end point on same trunk group. If no circuits are available, call is reattempted on another trunk group. If still no circuits, call is released back to ingress GSX with disconnect code 34 (NO CIRCUIT AVAILABLE). If 129 is generated twice for the same trunk group, the call is released back to the ingress GSX with disconnect reason 135 (COLLISION REATTEMPT EXHAUSTED). The ingress GSX may reattempt the call on another trunk group if a disconnect reason of 34 or 135 is in the Crankback Profile.
When 129 is generated at ingress GSX, code looks for another circuit/end point on same TG. Ifone, call is reattempted on another TG and if still no circuits, call is released with disconnect code 34. If 129 is generated twice for the same TG, call is released with disconnect code 135.
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 GSX service handler as well as the type of preceding switch.

The code that is returned when called party initiates the disconnect is stored in the "Call Disconnect Reason Transmitted to Ingress".
The code that is returned when calling party initiates the disconnect is stored in the "Call Disconnect Reason Transmitted to Egress".

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