引用自：https://stupidcaterpillar.wordpress.com/2010/09/09/cause-values-for-gprs-session-management/
Cause values for GPRS Session Management
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Causes related to nature of request
Cause value = 8 Operator Determined Barring
This cause code is used by the network to indicate that the requested service was rejected by the SGSN due to Operator Determined Barring.
Cause value = 24 MBMS bearer capabilities insufficient for the service
This cause code is used by the network to indicate that an MBMS context activation request was rejected by the network, because the MBMS bearer capabilities are insufficient for the MBMS service.
Cause value = 25 LLC or SNDCP failure (A/Gb mode only)
This cause code is used by the MS indicate that a PDP context is deactivated because of a LLC or SNDCP failure (e.g. if the SM receives a SNSM-STATUS.request message with cause “DM received ” or “ invalid XID response “, see 3GPP TS 44.065 [78])
Cause value = 26 Insufficient resources
This cause code is used by the MS or by the network to indicate that a PDP context activation request, secondary PDP context activation request, PDP context modification request, or MBMS context activation request cannot be accepted due to insufficient resources.
Cause value = 27 Unknown or missing access point name
This cause code is used by the network to indicate that the requested service was rejected by the external packet data network because the access point name was not included although required or if the access point name could not be resolved.
Cause value = 28 Unknown PDP address or PDP type
This cause code is used by the network to indicate that the requested service was rejected by the external packet data network because the PDP address or type could not be recognised.
Cause value = 29 User authentication failed
This cause code is used by the network to indicate that the requested service was rejected by the external packet data network due to a failed user authentication.
Cause value = 30 Activation rejected by GGSN, Serving GW or PDN GW
This cause code is used by the network to indicate that the requested service was rejected by the GGSN, Serving GW or PDN GW.
Cause value = 31 Activation rejected, unspecified
This cause code is used by the network to indicate that the requested service was rejected due to unspecified reasons.
Cause value = 32 Service option not supported
This cause code is used by the network when the MS requests a service which is not supported by the PLMN.
Cause value = 33 Requested service option not subscribed
See Annex G, clause 4.
Cause value = 34 Service option temporarily out of order
See Annex G, clause 4.
Cause value = 35 NSAPI already used
This cause code may be used by a network to indicate that the NSAPI requested by the MS in the PDP context activation request is already used by another active PDP context of this MS.
Never to be sent, but can be received from a R97/R98 network at PDP context activation
Cause value = 36 Regular deactivation
This cause code is used to indicate a regular MS or network initiated PDP context deactivation or a regular network initiated MBMS context deactivation.
Cause value = 37 QoS not accepted
This cause code is used by the MS if the new QoS cannot be accepted that were indicated by the network in the PDP Context Modification procedure.
Cause value = 38 Network failure
This cause code is used by the network to indicate that the PDP context deactivation or the MBMS context deactivation is caused by an error situation in the network.
Cause value = 39 Reactivation requested
This cause code is used by the network to request a PDP context reactivation after a GGSN restart.
Cause value = 40 Feature not supported
This cause code is used by the MS to indicate that the PDP context activation or the MBMS context activation initiated by the network is not supported by the MS.
Cause value = 41 semantic error in the TFT operation.
This cause code is used by the network or the MS to indicate that there is a semantic error in the TFT operation included in a secondary PDP context activation request or an MS-initiated PDP context modification or a network requested secondary PDP context activation.
Cause value = 42 syntactical error in the TFT operation.
This cause code is used by the network or the MS to indicate that there is a syntactical error in the TFT operation included in a secondary PDP context activation request or an MS-initiated PDP context modification or a network requested secondary PDP context activation.
Cause value = 43 unknown PDP context
This cause code is used by the network or the MS to indicate that the PDP context identified by the Linked TI IE in the secondary PDP context activation request or a network requested secondary PDP context activation is not active.
Cause value = 44 semantic errors in packet filter(s)
This cause code is used by the network or the MS to indicate that there is one or more semantic errors in packet filter(s) of the TFT included in a secondary PDP context activation request or an MS-initiated PDP context modification or a network requested secondary PDP context activation.
Cause value = 45 syntactical error in packet filter(s)
This cause code is used by the network or the MS to indicate that there is one or more syntactical errors in packet filter(s) of the TFT included in a secondary PDP context activation request or an MS-initiated PDP context modification or a network requested secondary PDP context activation.
Cause value = 46 PDP context without TFT already activated
This cause code is used by the network or the MS to indicate that it has already activated a PDP context without TFT.
Cause value = 47 Multicast group membership time-out
This cause code is used by the network to indicate that the MBMS context is deactivated because the timer supervising the IGMP group membership interval (see RFC 3376 [107], subclause 8.4) or the MLD multicast listener interval (see RFC 2710 [108], subclause 7.4) expired.
Cause value = 48 Activation rejected, B earerC ontrolMode violation
This cause code is used by the network or the MS to indicate that the requested service was rejected because of Bearer Control Mode violation.
Cause value = 50 PDP type IPv4 only allowed
This cause is used by the network to indicate that the requested PDN connectivity is accepted with the restriction that only PDP type IPv4 is allowed.
Cause value = 51 PDP type IPv6 only allowed
This cause is used by the network to indicate that the requested PDN connectivity is accepted with the restriction that only PDP type IPv6 is allowed.
Cause value = 52 single address bearers only allowed
This cause is used by the network to indicate that the requested PDN connectivity is accepted with the restriction that only single IP version bearers are allowed.
Cause value = 56 Collision with network initiated request.
This cause code is used by the network to indicate that the MS-initiated request was rejected since the network has requested a secondary PDP context activation for the same service using a network-initiated procedure.
Cause value = 112 APN restriction value incompatible with active PDP context.
This cause code is used by the network to indicate that the PDP context(s) or MBMS context(s) have an APN restriction value that is not allowed in combination with a currently active PDP context. Restriction values are defined in 3GPP TS 23.060 [74], subclause 15.4.