Skip to end of metadata
Go to start of metadata

The following table lists the call termination reason codes:

Table : Call Termination Reason Codes

ID

Definition

Q.931 Standard (0-127)

0

INVALID DISCONNECT REASON

1

UNALLOCATED NUMBER
(Because the SBC never generates this internally, this code originates at a switch downstream from this SBC.)

2

NO ROUTE TO SPECIFIED NETWORK

3

NO ROUTE TO DESTINATION

[Sonus codes 138 and 139 are mapped to this ID. This mapping is performed before ISUP Release Message is sent. The "underlying" Sonus code is placed into accounting record.]

(The SBC may release a call with this cause value if:

  • No routes are configured on PSX for this destination.
  • The PSX loses connectivity to Oracle DB server and hence is unable to perform routing)

4

SEND SPECIAL INFO TONE

5

MISDIALED TRUNK PREFIX

6

CHANNEL UNACCEPTABLE

7

CALL AWARDED

8

PREEMPTION

9

PREEMPTION - CIRCUIT RESERVED

12

VALUE NOT CODED

16

NORMAL ROUTE CLEARING
[ISUP codes 12, 32, and 36 are mapped to this ID]

17

USER BUSY

18

NO USER RESPONDING

(The SBC may release a call with this cause value if:

  • The CAS SSP that is executed on an egress call does not have WAIT ANSWER configured as the last step in the sequence. This token is typically configured to await an off hook at the Far-End. In this case, this token is performed by default with a 30 second timeout. If this timer expires then this code is returned.
  • ISDN User Part (ISUP) for an Egress Call releases a call because of an Address Complete Message (ACM) timeout from the SGX. In this case, the SGX forwards Q.931 code 31 (NORMAL UNSPECIFIED) to the PSTN switch.
  • In general, SBC times out waiting for an ISUP ACM or ALERTING or CON message after sending Initial Address Message (IAM) SETUP)

19

NO ANSWER FROM USER

(SBC may release a call with this cause value if ISUP for an egress call releasescallbecause of ANM timeout from SGX. In this case, the SGX forwards Q.931 code 102 (RECOVERY ON TIMER EXPIRY) to PSTN switch)

20

SUBSCRIBER ABSENT

21

CALL REJECTED

22

NUMBER CHANGED

23

UNALLOCATED DESTINATION NUMBER

24

UNKNOWN BUSINESS GROUP

25

EXCHANGE ROUTING ERROR

26

MISROUTED CALL TO PORTED NUMBER
(The SBC may release a call with this cause value if:

  • An LNP translation produces a subscriber that is in a state of transition
  • An LNP translation produces a subscriber that is in a state of ported out
    This could occur either when the PSX initiates the LNP query to the SCP database, or when the PSX receives a policy request where the translation has been performed by a downstream switch.)

27

DESTINATION OUT OF ORDER

28

INVALID NUMBER FORMAT

(The SBC may release a call with this cause value if LNP translation is performed by a downstream switch and General Address Parameter digits sent to the PSX are in an incorrect format, that is, either too many digits or the number type is incorrect.)

29

FACILITY REJECTED

30

RESPONSE TO STATUS ENQUIRY

(ISUP specific and thus not applicable to ISDN, H323, or SIP calls.)

31

NORMAL UNSPECIFIED

[Sonus codes 133, 141, 144, and 145 are mapped to this ID. Mapping is performed before the ISUP Release Message is sent out. The "underlying" Sonus code is placed into the accounting record.]

[ISUP codes 6, 7, 24, and 25 are mapped to this ID]

(The SBC may release a call with this cause value if:

  • ISUP circuits were reset via CLI command, causing all calls on those circuits to be brought down.
  • ISDN circuits were reset via CLI command, causing all calls on those circuits to be brought down.
  • ISDN Channels were restarted by the Far-End switch bringing down all calls on those circuits.
  • CAS circuits were reset via CLI command, causing all calls on those circuits to be brought down.
  • Any other CLI command, such as a command to take a T1 or CNS out of service, causes all calls on those circuits to go down.
  • An ISUP Continuity Test timed out.
  • ISUP circuits were reset by the Far-End switch.
  • Calls were cleared by the SGX because of protocol time-outs.)

32

VALUE NOT CODED

34

NO CIRCUIT AVAILABLE

[Sonus codes 128, 140, and 142 are mapped to this ID. This mapping is performed before the ISUP Release Message is sent out. The "underlying" Sonus code is placed into the accounting record.]

The SBC may release a call with this cause value if:

  • The SBC attempts to initially route the call but none of the routes has any available circuits.
  • SBC attempts to reroute call ("crankback"), but is out of routes or out of routes with available circuits. An attempt to reroute call may have various causes. When this is the result of an attempted reroute, the cause value triggering the reroute is placed into accounting record.
  • A SBC software programming error occurred.

35

VALUE NOT CODED

36

VALUE NOT CODED

38

NETWORK OUT OF ORDER

The SBC may release a call with this cause value if:

  • Gateway-to-Gateway Signaling Link to Far-End SBC is lost due to network problems or CLI command. In either event, all calls to that SBC are cleared with this disconnect reason.
  • Gateway-to-Gateway Signaling Link to Far-End SBC went down and then back up. Afterwards, the SBCsaudit all calls between them. Any mismatched calls are brought down with this disconnect reason.

39

PERM FM CONNECTION OOS

40

PERM FM CONNECTION OPERATIONAL

41

TEMPORARY FAILURE

[Sonus codes 131, 132, and 136 are mapped to this ID. This mapping is performed before the ISUP Release Message is sent out. The "underlying" Sonus code is placed into the accounting record.]

The SBC may release a call with this cause value if:

  • Communication between SBC and PSX is broken and Policy Requests from the SBC to the PSX time out.
  • A Policy Request issued from the SBC to the PSX was rejected by the PSX because of corrupted data in the packet - an indication of possible network problems.
  • A SBC software programming error occurred.
  • ISUP calls were brought down as a result ofcorrectiveaction that was performed following a Circuit Query with a Far-End PSTN Switch.
  • Connectivity to SS7 Gateway is lost and all active SS7 Calls in the SBC are brought down.
  • The SBC received a UCIC ISUP Message from a Far-End PSTN Switch that contained a CIC of an active SBC call.
  • Call admission on SBC is suspended due to CNS Failure, switchover, standby card synchronization, no NTP time, or other issues. All new call admission requests from other SBCs over Gateway-to-Gateway signaling are released tooriginating gateway with this code.
  • Catastrophic failure such as a CNS failure or a PNS failure occurs on a SBC and all affected calls are released. The SBC releases these calls back to the originating gateway over the gateway-to-gateway signaling link with this code.
  • T8 Timer expires in ISUP. This timer expires ifSBC does not receive a COT message from previous switch within T8 Timer duration, when the IAM indicates that a COT is being performed.
    In general when SBC is not getting responses from PSX, this indicates IP network congestion or PSX overload. Both are transient conditions that will resolve themselves, hence the use of this code to indicate a temporary failure situation.

42

SWITCHINGEQUIP CONGESTION

43

ACCESS INFORMATION DISCARDED
(The SBC may release a call with this cause value if this code is returned before an ANM/CONNECT message.)

44

REQUESTED CIRCUIT NOT AVAILABLE

45

ANSI PREEMPTION

46

PRECEDENCE CALL BLOCKED

47

RESOURCE UNAVAILABLE UNSPECIFIED[ISUP codes 39, 40, and 45 are mapped to this ID.]

49

QUALITY OF SERVICE UNAVAILABLE

50

REQUESTED FACILITY NOT SUBSCRIBED

51

CALL TYPE INCOMPATIBLE WITHSEREVICE

53

OUTGOING CALL BARRED CUG

54

CALL BLOCKED GROUP RESTRICTIONS

55

INCOMING CALL BARRED CUG
(SBC may release a call with this cause value if this code is returned before an ANM/CONNECT message. CUG is CLOSED USER GROUP.)

57

BEARER CAPABILITY NOT AUTHORIZED

58

BEARER CAPABILITY PRESENTLY NOT AVAILABLE

62

INCONSISTENT OUTGOING SUBSCRIBER CLASS

63

SERVICE OR OPTION NOT AVAILABLE UNSPECIFIED

[Sonus code 137 is mapped to this ID. This mapping is performed before the ISUP Release Message is sent out. The "underlying" Sonus code is placed into the accounting record.]

[ISUP codes 49, 51, and 54 are mapped to this ID.]

65

BEARER CAPABILITY NOT IMPLEMENTED

66

CHANNEL TYPE NOT IMPLEMENTED

69

REQUESTED FACILITY NOT IMPLEMENTED

70

ONLY RESTRICTED DIGITAL INFO BEARER CAPABILITY AVAILABLE

79

SERVICE OR OPTION NOT IMPLEMENTED UNSPECIFIED[ISUP code 66 is mapped to this ID.]

80

VALUE NOT CODED

81

INVALID CALL REFERENCE

82

CHANNEL DOES NOT EXIST

83

SUSPENDED CALL NO IDENTITY

84

CALL IDENTITY IN USE

85

NO CALL SUSPENDED

86

CALL IDENTITY CLEARED

87

NOT MEMBER OF CUG

(SBC may release a call with this cause value if this code is returned before an ANM/CONNECT message. CUG is CLOSED USER GROUP.)

88

INCOMPATIBLE DESTINATION

90

NON-EXISTENT CUG

91

INVALID NETWORK SELECTION

95

INVALID MESSAGE UNSPECIFIED[ISUP codes 81, 82, 83, 84, 85, and 86 are mapped to this ID.]

96

MANDATORY INFORMATION ELEMENT MISSING

97

MESSAGE TYPE NON-EXISTENT OR NOT IMPLEMENTED

98

MSG TYPE NC NE OR NI(NC is NOT COMPATIBLE. NE is NON EXISTING. NI is NOT IMPLEMENTED. This code typically suggests an incompatibility in the network.)

99

IE NOT IMPLEMENTED

100

INVALID INFORMATION ELEMENT CONTENT

101

MSG NOT COMPATIBLE WITH STATE

102

RECOVERY ON TIMER EXPIRY(The SBC may release a call with this cause value if the internal SBC Call Establishment Timer expires. This interval is 5 minutes.)

103

PARAMETER NOT IMPLEMENTED

110

UNRECOGNIZED PARAMETER

111

PROTOCOL ERROR UNSPECIFIED[ISUP codes 96, 98, 100, and 101 are mapped to this ID.]

[nttfcc ISUP code 102 is mapped to this ID.]

The SBC may release a call with this cause value if:

  • The PSX could not find routes to a destination because they were filtered out due to protocol conformance errors, according to the conventions cited in GR-317/394.
  • A CAS Call Establishment error that is not configured to be handled in the SSP occurs, causing CAS to release the call with this code.
  • Another error in a CAS SSP/SCP configuration that is being used by a call causes the call to be released with this code.

127

INTERWORKING UNSPECIFIED

The SBC may release a call with this cause value if:

  • Incoming CAS call goes on-hook while being established and event not configured on SSP.
  • Incoming CAS call goes on-hook after being established.
  • Outgoing CAS call goes on-hook after being established.
Sonus Extensions above 127:

128

RESOURCES ALLOCATION FAILURE[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release a call with this cause value if:

  • No PSTN circuits are available to hunt.
  • The DSP call resources are exhausted.
  • Call admissions to system are suspended due toeventsuch as switchover, CNS switchover, etc.
  • The SBC memory resources are exhausted.)

129

CHANNEL COLLISION BACKOFF[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if a call collision occurs on the selected egress circuit, resulting in backoff and reattempt of the call.)

130

INSUFFICIENT DESTINATION RESOURCES

[This Sonus code is mapped to Q.931 ID 34.]

(SBC may release a call with this cause value if insufficient resources are available on destination gateway and rerouting is invoked to reattempt the call via a different route on the originating gateway.)

131

RESOURCE FAILURE

[This Sonus code is mapped to Q.931 ID 41.]

(SBC may release a call with this cause value if a resource that was being used by the call fails and is no longer available. Taking a span out of service could cause this code.)

132

MODULE FAILURE

[This Sonus code is mapped to Q.931 ID 41.]

(SBC may release a call with this cause value if a catastrophic failure causes bulk teardown of all calls on the module, and those calls are disconnected. A module failure, a module switchover, a span failure, an SGX that is temporarily placed into "PAUSED" state while calls are active, a SBC-to-SGX IP network failure resulting in loss of connectivity, etc. could cause this code.)

133

MEDIA GATEWAY SERVICE GROUP EGRESS DISCONNECT

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if an egress disconnect is indicated due to receipt of the MGCP DLCX message.)

134

CONTINUITY CHECK FAILED, BACKOFF

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if a continuity check on an egress circuit fails, resulting in backoff and reattempt of the call on a different circuit.)

135

COLLISION REATTEMPT EXHAUSTED

[This Sonus code is mapped to Q.931 ID 41.]

(The SBC may release a call with this cause value if two consecutive collisions occur on the egress ISUP/ISDN/CAS circuit. For PSTN-PSTN calls, after one reattempt, or two collisions, the call is released with this code. For PSTN-IP-IP-PSTN calls, the call isreattempted using the next route in the list.)

136

CONTINUITY REATTEMPT EXHAUSTED

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if two consecutive continuity tests on the selected egress circuits fail. After one reattempt, the call is released with this code.)

137

NO ROUTE FOR BEARER CAPABILITY

[This Sonus code is mapped to Q.931 ID 63.]

(SBC may release a call with this cause value if PSX routing lookup fails because no route with the Bearer Capability required for this call exists on PSX.)

138

NO ROUTE SIGNALING

[This Sonus code is mapped to Q.931 ID 3.]

(SBC may release call with this cause value if PSX routing lookup fails because no route with signaling required for this call exists on PSX.)

139

NO ROUTE DIRECTION

[This Sonus code is mapped to Q.931 ID 3.]

(SBC may release call with this cause value if PSX routing lookup fails because no route with direction required for this call exists on PSX.)

140

CIRCUIT ENDPOINT RESOURCE ALLOCATION FAILURE

[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release a call with this cause value if the circuit is released after being selected. Events such as a NIF being placed out of service or a port going into alarm may cause this code.)

141

DISCONNECT WITH NEW DESTINATION

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if the egress circuit is released while the ingress call is rerouted to a new destination, or the call is transferred.)

142

AUTOMATIC CONGESTION CONTROL PROCEDURE

[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release a call with this cause value if Automatic Congestion Control (ACC) is configured, insufficient resources are detected at the far end, and the call is cancelled. When ACC is active, calls may be rerouted or cancelled, depending on:

  • current congestion level
  • Alternate Route versus Direct Route requirements
  • Percentage of calls to be rerouted versus cancelled
    This release code indicates that this call was cancelled, rather than rerouted.)

143

ACC ALTERNATE ROUTE

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if Automatic Congestion Control (ACC) is configured, insufficient resources are detected at the far end, and the call is rerouted. When ACC is active, calls may be rerouted or cancelled, depending on:

  • current congestion level
  • Alternate Route versus Direct Route requirements
  • Percentage of calls to be rerouted versus cancelled
    This release code indicates that this call was rerouted, or reattempted on an alternate route.)

144

PACKET LOSS EXCEEDS THRESHOLD

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if RTCP disconnects the call because the measured packet loss within a specified timeframe exceeds a configured threshold. This timeframe, the RTCP Sender Report interval, and the threshold value are specified in the PSX Packet Service Profile.)

145

NO RTP OR RTCP PACKETS

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value if RTCP disconnects the call because no RTP or RTCP packets were received within the specified timeframe. This timeframe is two RTCP Sender Report intervals, as specified in the PSX Packet Service Profile. This absence of packets for this timeframe is "loss of RTP bearer channel".)

146

HOP COUNTER EXHAUSTED

[This Sonus code is mapped to Q.931 ID 25.]

(The SBC may release a call with this cause value if the call was terminated because the ISUP hop counter was exhausted; not applicable to ISDN, H323, or SIP calls.)

147

CONVERSION FAILURE

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause value because the Gateway to Gateway Signaling protocol could not convert an MCS message.)

148

CPC_DISC_CONGESTION_REROUTE_NOT_PERMITTED

[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release calls that utilize the BT-IUP service with this cause value.)

149

CPC_DISC_SBC_INCOMPATIBLE_DESTINATION

[This Sonus code is mapped to Q.931 ID 88.]

(The SBC may release a call with this cause code if the SBC version running on the destination Gateway is not compatible with the SBC version running on the originating Gateway.)

150

CPC_DISC_NO_PSX_ROUTES

[This Sonus code is mapped to Q.931 ID 3.]

(The SBC may release a call with this cause code if a policy response from the PSX that contains routes is received with no routes.)

151

CPC_DISC_SETUP_REQ_TIMER_EXPIRY

[This Sonus code is mapped to Q.931 ID 102.]

(The SBC may release a call with this cause code if there is a timer expiry on a setup request, for example no response by the peer to a SIP INVITE message on the egress call leg. This reason code is in the defaultcrankback profile, and will causecrankback on the next route returned by PSX for the destination.)

152

CPC_DISC_GW_CONGESTED

[This Sonus code is mapped to Q.931 ID 42.]

(The remote SBC may release a gateway-to-gateway call with this cause code to indicate that gateway is congested. The local SBC will then skip any additional routes in the route list for that call that go to the congested gateway.)

153

CPC_DISC_GLARE_OCCURRED

[This Sonus code is mapped to Q.931 ID 0.]

(The SBC may release a call with this cause code when GLARE prevents a call from setting up. Hence this cause code will populate the Call Disconnect Reason Field in an ATTEMPT record.)

154

CPC_DISC_NO_TERM_CIT_RCVD

[This Sonus code is mapped to Q.931 ID 41.]

(The SBC may release a call with this cause code if the "Terminating carrier information" or "Terminating CA" parameter in SIP message is not received before Answer state. Based on IP signaling control flag "Disconnect If Neither Terminating CA Nor CIC Received.")

155

CPC_DISC_BUSY_EVERYWHERE

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a High Probability of Completion (HPC) call with this cause code to indicate that all routes have failed.)

156

CPC_DISC_REASON_UNKNOWN_RESOURCE_PRIORITY

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a High Probability of Completion (HPC) call with this cause code when a bad resource priority header (RPH) isrecieved in a SIP message.)

157

CPC_DISC_REASON_BAD_EXTENSION

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause code when the required SIP Extension is not supported.)

158

CPC_DISC_REASON_QUEUE_TIMEOUT

[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release a queued High Probability of Completion (HPC) call with this cause code if a queue timeout has occurred.)

159

CPC_DISC_REASON_FORBIDDEN

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release a call with this cause code if High Probability of Completion HPC treatment cannot be applied.)

160(Reserved for future use)

161

CPC_DISC_REASON_QUEUEING_IMPOSSIBLE

[This Sonus code is mapped to Q.931 ID 34.]

(The SBC may release a High Probability of Completion (HPC) call with this cause code because there are no available circuits and the call cannot be queued because queuing limits will be exceeded, or because queuing is not enabled.)

162

CPC_DISC_ACC_INGRESS

(Indicates MLPP call preemption reasons)

163CPC_DISC_UA_PREEMPTION
164

CPC_DISC_NETWORK_PREEMPTION  

(Indicates that the resouce-list content type  transpaceny is not enabled, but incoming request has the resource-list content type.)

165CPC_DISC_RESOURCE_LIST_TRANS_FAIL
166

CPC_DISC_PDD_TIMER_EXPIRED

[This Sonus code is mapped to Q.931 ID 42.]

(The SBC may release a call with this cause code if disconnect happens due to PDD Timer expiry in the ATTEMPT Record.)

172

CPC_DISC_ERROR_INFO_RLS

(The SBC may release a call with this cause code if there is an error in the release of the call while playing an announcement.)

176

CPC_DISC_TG_AUTH_FAIL

[This Sonus code is mapped to Q.931 ID 31.]

(The SBC may release the call with this error code, if the request with credentials is rejected with non 401/407. This cause code is mapped to SIP error cause code of 403. This cause code can be configured to map to any SIP error cause.)

177

CPC_DISC_TG_AUTH_FAIL_401_407

[This Sonus code is mapped to Q.931 ID 31.]

(If the request with credentials is rejected with non 401/407, the call is rejected with new internal cause code. This cause code can be mapped to any SIP error cause code. By default, it is mapped to SIP cause code 403. This cause code can be configured to map to any SIP error cause.)

178

CPC_DISC_RX_RAR_GUARD_TIMER_EXPIRED

This Indicates PLMN ID is not received in AAA.

179

CPC_DISC_INFO_METHOD_REJECT

This Indicates SIP INFO method is not supported.

180

CPC_DISC_MESSAGE_METHOD_REJECT

This Indicates SIP MESSAGE method is not supported.

181

CPC_DISC_NOTIFY_METHOD_REJECT

This Indicates SIP NOTIFY method is not supported.

182

CPC_DISC_OPTIONS_METHOD_REJECT 

This Indicates SIP OPTIONS method is not supported.

183

CPC_DISC_PUBLISH_METHOD_REJECT

This Indicates SIP PUBLISH method is not supported.

184

CPC_DISC_REFER_METHOD_REJECT

This Indicates SIP REFER method is not supported.

185

CPC_DISC_REGISTER_METHOD_REJECT

This Indicates SIP REGISTER method is not supported.

186

CPC_DISC_SUBSCRIBE_METHOD_REJECT

This Indicates SIP SUBSCRIBE method is not supported.

187

CPC_DISC_UPDATE_METHOD_REJECT

This Indicates SIP UPDATE method is not supported.

188

CPC_DISC_EP_CAC_VIDEO_THR 

This indicates Video threshold is crossed (Used Bandwidth above video threshold).

189

CPC_DISC_REFER_METHOD_RELAY

This indicates to relay REFER Method.

190

CPC_DISC_ENCRYPT_LICENSE_ENFORCED

This indicates Encrypt License is unavailable.

191

CPC_DISC_SRTP_LICENSE_ENFORCED

This indicates SRTP license is unavailable.

192

CPC_DISC_RETRY_PROFILE_IN_REDIRECT_MODE

This indicates Retry Profile is being applied in Redirection mode.

193

CPC_DISC_WITH_RETRY_PROFILE

This indicates Retry Profile is being applied.

194

CPC_DISC_AMRNB_LICENSE_ENFORCED

This indicates AMR Narrow Band License is unavailable.

195

CPC_DISC_AMRWB_LICENSE_ENFORCED

This indicates AMR Wide Band License is unavailable.

196

CPC_DISC_EVRC_LICENSE_ENFORCED

This indicates EVRC License is unavailable.

197

CPC_DISC_MRF_CALL_CLEANUP_RCVD

This indicates Call tear down request received from MRF-RM(BYE received from MRF server).

198

CPC_DISC_MRF_MODIFY_FAILED

This indicates MRF modify failed(MODIFY reply from MRF-RM).

199

CPC_DISC_VDSP_LICENSE_ENFORCED

This indicates VDSP License is unavailable.

200

CPC_DISC_MRF_LICENSE_ENFORCED

This indicates MRF License is unavailable.

201

CPC_DISC_CAC_NON_REG_LIMIT_REACHED

This indicates CAC for Non Registered Eps Limit Reached.

202

CPC_DISC_EVS_LICENSE_ENFORCED

This indicates EVS License is unavailable.

203

CPC_DISC_SMM_ACTION_TEARDOWN

This indicates call tear down by SMM action.