Timer value
NOTE 2
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
3GPP Scout / Reference / EPS NAS timers / Timers T3413 and T3415
TS 24.301NAS timer
Timers T3413 and T3415: Paging for EPS services
Covers
TS 24.301 words these values in parallel, so they share this page. Each has its own section with the spec text and a plain explanation.
Timer T3413: EPS mobility management, network side
In plain words
The network starts T3413 when it initiates paging for EPS services. What happens when T3413 expires is network dependent.
Our summary of the spec text quoted below.
Started when
Paging procedure for EPS services initiated
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
On expiry
Network dependent
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Stopped when
Paging procedure for EPS services completed Paging procedure is aborted
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
State
EMM-REGISTERED
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Note 2 of the table
NOTE 2: The value of this timer is network dependent.
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Note 10 of the table
NOTE 10: In WB-S1 mode, if the UE supports CE mode B, then the timer value shall be calculated by using an NAS timer value which value is network dependent.
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Note 8 of the table
NOTE 8: In NB-S1 mode, then the timer value shall be calculated by using [...]
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Timer T3415: EPS mobility management, network side
In plain words
The network starts T3415 when it initiates EPS paging for a UE accepted for eDRX without a PDN connection for emergency bearer services. On expiry, the network aborts paging and proceeds as specified in 3GPP TS 23.401.
Our summary of the spec text quoted below.
Timer value
NOTE 6
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Started when
Paging procedure for EPS services initiated for a UE which the network accepted the request to use eDRX and the UE does not have a PDN connection for emergency bearer services
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
On expiry
Paging procedure is aborted and the network proceeds as specified in 3GPP TS 23.401 [10]
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Stopped when
Paging procedure for EPS services completed Paging procedure is aborted
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
State
EMM-REGISTERED
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Note 6 of the table
NOTE 6: The value of this timer is smaller than the value of timer T3-RESPONSE (see [...]
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Same timer in 5GS (TS 24.501)
TS 24.501 defines the corresponding timer for 5GS. Its page quotes the 5GS wording.
- T3513 (TS 24.501)
How this page was made
3GPP Scout built this page from TS 24.301 V20.1.0 as indexed on 2026-10-15. The quotes are copied from the spec, and code checks each one against the stored text and the 3GPP archive file before publishing. The plain-words lines were written by an AI model (GPT-6 Sol) and checked against the quotes by a second AI model from another company (Claude Opus 5.5). The official 3GPP text governs.