NAS cause values and timers

TS 24.501 V20.1.0TS 24.301 V20.1.0252 values on 184 pagesChecked 2026-10-15

At a glance

Short pages for the 5GMM, 5GSM, EMM and ESM causes and the NAS timers defined in TS 24.501 and TS 24.301. Each value is quoted from the spec with its clause and version, explained in plain words, and linked to related values and the official 3GPP text.

5GMM cause values

5GMM cause values from TS 24.501 clause 9.11.3.2. Each page quotes the cause name and its description from the spec. Values the spec words in parallel share a page.

#3
#5
#6
#7
#9
#10
#11
#12
#13
#15
#20
#21
#22
#23
#24
#26
#27
#28
#31
#36
#43
#62
#65
#67
#69
#71
#72
#73
#74
#75
#76
#77
#78
#79
#80
#81
#82
#90
#91
#92
#93
#94
#95
#96
#97
#98
#99
#100
#101
#111

5GSM cause values

5GSM cause values from TS 24.501 clause 9.11.4.2. Each page quotes the cause name and its description from the spec. Values the spec words in parallel share a page.

#8
#26
#27
#28
#29
#31
#32
#33
#35
#36
#37
#38
#39
#41
#42
#43
#44
#45
#46
#47
#50
#51
#54
#57
#58
#59
#61
#67
#68
#69
#70
#81
#82
#83
#84
#85
#86
#87
#95
#96
#97
#98
#99
#100
#101
#111

5GS NAS timers

5GS mobility management, UE side (TS 24.501 clause 10.2)

5GS mobility management, AMF side (TS 24.501 clause 10.2)

5GS session management, UE side (TS 24.501 clause 10.3)

5GS session management, SMF side (TS 24.501 clause 10.3)

UE policy delivery, PCF side (TS 24.501 clause D.7)

T3501

EMM cause values

EMM cause values from TS 24.301 clause 9.9.3.9. Each page quotes the cause name and its description from the spec. Values the spec words in parallel share a page.

#2
#3
#5
#6
#7
#8
#9
#10
#11
#12
#13
#14
#15
#16
#17
#18
#19
#20
#21
#22
#23
#24
#25
#26
#31
#35
#36
#39
#40
#42
#78
#80
#83
#95
#96
#97
#98
#99
#100
#101
#111

ESM cause values

ESM cause values from TS 24.301 clause 9.9.4.4. Each page quotes the cause name and its description from the spec. Values the spec words in parallel share a page.

#8
#26
#27
#28
#29
#30
#31
#32
#33
#34
#35
#36
#37
#38
#39
#41
#42
#43
#44
#45
#47
#49
#50
#51
#52
#53
#54
#55
#56
#57
#58
#59
#60
#61
#65
#66
#81
#95
#96
#97
#98
#99
#100
#101
#111
#112
#113

EPS NAS timers

EPS mobility management, UE side (TS 24.301 clause 10.2)

EPS mobility management, network side (TS 24.301 clause 10.2)

EPS session management, UE side (TS 24.301 clause 10.3)

EPS session management, network side (TS 24.301 clause 10.3)

Go further

Looking for a value from another spec? Scout looks up GMM, SM, GTPv2-C and PFCP causes, timers and information elements, with the clause and the official link.

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15GMM cause values

25GSM cause values

35GS NAS timers