Name in the cause table
IAB-node operation not authorized
Source: 3GPP TS 24.501 V20.1.0, clause 9.11.3.2, table 9.11.3.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
3GPP Scout / Reference / 5GMM causes / 5GMM cause #36
TS 24.5015GMM cause
5GMM cause #36: IAB-node operation not authorized
In plain words
The network sends this cause for IAB-node service requests or network initiated de-registration in a PLMN or SNPN where the UE's subscription disallows IAB operation.
Our summary of the spec text quoted below.
What the spec says
When it is used
This 5GMM cause is sent to the UE if a UE operating as an IAB-node requests service, or if the network initiates a de-registration procedure, in a PLMN or SNPN where the UE by subscription is not authorized for IAB operation.
Source: 3GPP TS 24.501 V20.1.0, clause A.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Same cause in EPS (TS 24.301)
TS 24.301 defines the corresponding cause for EPS. Its page quotes the EPS wording.
- EMM cause #36 (TS 24.301)
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 line was 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.