Timer value
NOTE 3
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
3GPP Scout / Reference / 5GS NAS timers / Timers T3584 and T3585
TS 24.501NAS timer
Timers T3584 and T3585: 5GS session management, UE side
Covers
TS 24.501 words these values in parallel, so they share this page. Each has its own section with the spec text and a plain explanation.
Timer T3584: 5GS session management, UE side
In plain words
The UE starts T3584 on receiving cause #67 and a timer value in listed reject, release or transport messages and takes no action on expiry.
Our summary of the spec text quoted below.
Started when
PDU SESSION ESTABLISHMENT REJECT, PDU SESSION MODIFICATION REJECT, or PDU SESSION RELEASE COMMAND received with 5GSM cause #67 and with a timer value for T3584 PDU SESSION ESTABLISHMENT REQUEST, or PDU SESSION MODIFICATION REQUEST received in a DL NAS TRANSPORT message with 5GMM cause #67 and with a timer value [...]
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
On expiry
None
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Stopped when
PDU SESSION RELEASE COMMAND message (see NOTE 6) or PDU SESSION MODIFICATION COMMAND message or PDU SESSION AUTHENTICATION COMMAND message or DEREGISTRATION [...]
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Timer T3585: 5GS session management, UE side
In plain words
The UE starts T3585 on receiving cause #69 and a timer value in listed reject, release or transport messages and takes no action on expiry.
Our summary of the spec text quoted below.
Timer value
NOTE 3
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Started when
PDU SESSION ESTABLISHMENT REJECT, PDU SESSION MODIFICATION REJECT, or PDU SESSION RELEASE COMMAND received with 5GSM cause #69 and with a timer value for T3585 PDU SESSION ESTABLISHMENT REQUEST, or PDU SESSION MODIFICATION REQUEST received in a DL NAS TRANSPORT message with 5GMM cause #69 and with a timer value [...]
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
On expiry
None
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Stopped when
PDU SESSION RELEASE COMMAND message (see NOTE 6) or PDU SESSION MODIFICATION COMMAND message or PDU SESSION AUTHENTICATION COMMAND message or DEREGISTRATION [...]
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
How this page was made
3GPP Scout built this page from TS 24.501 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.