S4-260018 - AI Proposals

Reply LS on issues related to support of IMS voice over NB-IoT NTN connected to EPC

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Proposal: SA1's view is that
- support for more than one (simultaneous) IMS voice call is not required in this Release.
- support for Dual-Tone Multi-Frequency (DTMF) is required.

Document Information
TDoc:
S4-260018
Source:
SA1
Type:
LS in
For:
Information
Original Document:
View on 3GPP
Title: Reply LS on issues related to support of IMS voice over NB-IoT NTN connected to EPC
Agenda item: 5.2
Agenda item description: Other 3GPP groups
Doc type: LS in
For action: Information
Original LS: S1-254508
Cc: RAN2, SA4, CT1, SA3, RAN1
To: SA2
Contact: Andrijana Brekalo
Uploaded: 2026-01-21T09:41:08.520000
Contact ID: 91743
TDoc Status: noted
Reservation date: 21/01/2026 09:33:55
Agenda item sort order: 7