Name in the cause table
PDU session type IPv4 only allowed
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.
3GPP Scout / Reference / 5GSM causes / 5GSM causes #50, #51, #57, #58 and #61
TS 24.5015GSM cause
5GSM causes #50, #51, #57, #58 and #61: PDU session type only allowed
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 #50: PDU session type IPv4 only allowed
In plain words
The network sends this cause when only PDU session type IPv4 is allowed for the requested IP connectivity.
Our summary of the spec text quoted below.
When it is used
This 5GSM cause is used by the network to indicate that only PDU session type IPv4 is allowed for the requested IP connectivity.
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 #51: PDU session type IPv6 only allowed
In plain words
The network sends this cause when only PDU session type IPv6 is allowed for the requested IP connectivity.
Our summary of the spec text quoted below.
Name in the cause table
PDU session type IPv6 only allowed
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 to indicate that only PDU session type IPv6 is allowed for the requested IP connectivity.
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 #57: PDU session type IPv4v6 only allowed
In plain words
The network sends this cause when only PDU session types IPv4, IPv6 or IPv4v6 are allowed for the requested IP connectivity.
Our summary of the spec text quoted below.
Name in the cause table
PDU session type IPv4v6 only allowed
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 to indicate that only PDU session types IPv4, IPv6 or IPv4v6 are allowed for the requested IP connectivity.
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 #58: PDU session type Unstructured only allowed
In plain words
The network sends this cause to indicate that only PDU session type Unstructured is allowed for the requested DN connectivity.
Our summary of the spec text quoted below.
Name in the cause table
PDU session type Unstructured only allowed
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 to indicate that only PDU session type Unstructured is allowed for the requested DN connectivity.
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 #61: PDU session type Ethernet only allowed
In plain words
The network sends this cause to indicate that only PDU session type Ethernet is allowed for the requested DN connectivity.
Our summary of the spec text quoted below.
Name in the cause table
PDU session type Ethernet only allowed
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 to indicate that only PDU session type Ethernet is allowed for the requested DN connectivity.
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.
Same causes in EPS (TS 24.301)
TS 24.301 defines the corresponding causes for EPS. Their pages quote the EPS wording.
- ESM cause #50 (TS 24.301)
- ESM cause #51 (TS 24.301)
- ESM cause #57 (TS 24.301)
- ESM cause #58 (TS 24.301)
- ESM cause #61 (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 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.