3GPP Scout / Reference / 5GSM causes / 5GSM causes #83 and #84

TS 24.5015GSM cause

5GSM causes #83 and #84: Semantic or syntactical error in the QoS operation

TS 24.501 V20.1.0Clause 9.11.4.22 valuesChecked 2026-10-15

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.

5GSM cause #83: Semantic error in the QoS operation

Clause 9.11.4.2Value 83 (bits 0101 0011)

In plain words

The network or UE sends this cause when a semantic error in the requested QoS operation causes the requested service to be rejected.

Our summary of the spec text quoted below.

Name in the cause table

Semantic error in the QoS operation

Source: 3GPP TS 24.501 V20.1.0, clause 9.11.4.2, table 9.11.4.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.

When it is used

This 5GSM cause is used by the network or the UE to indicate that the requested service was rejected due to a semantic error in the QoS operation included in the request.

Source: 3GPP TS 24.501 V20.1.0, clause B.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.

5GSM cause #84: Syntactical error in the QoS operation

Clause 9.11.4.2Value 84 (bits 0101 0100)

In plain words

The network or UE sends this cause when a syntactical error in the requested QoS operation causes the requested service to be rejected.

Our summary of the spec text quoted below.

Name in the cause table

Syntactical error in the QoS operation

Source: 3GPP TS 24.501 V20.1.0, clause 9.11.4.2, table 9.11.4.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.

When it is used

This 5GSM cause is used by the network or the UE to indicate that the requested service was rejected due to a syntactical error in the QoS operation included in the request.

Source: 3GPP TS 24.501 V20.1.0, clause B.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.