Name in the cause table
IAB-node operation not authorized
Source: 3GPP TS 24.301 V20.1.0, clause 9.9.3.9, table 9.9.3.9.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
3GPP Scout / Reference / EMM causes / EMM cause #36
TS 24.301EMM cause
EMM cause #36: IAB-node operation not authorized
In plain words
The UE's subscription does not authorize IAB operation in the PLMN. The network sends this cause when a UE operating as an IAB-node requests service there or the network initiates a detach request.
Our summary of the spec text quoted below.
What the spec says
When it is used
This EMM cause is sent to the UE if a UE operating as an IAB-node requests service, or if the network initiates a detach request, in a PLMN where the UE, by subscription, is not authorized for IAB operation.
Source: 3GPP TS 24.301 V20.1.0, clause A.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Same cause in 5GS (TS 24.501)
TS 24.501 defines the corresponding cause for 5GS. Its page quotes the 5GS wording.
- 5GMM cause #36 (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 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.