Public Consultation on Singapore Telecommunications Limited’s Reference Interconnection Offer for IP-based Interconnection for Voice Services

Issued Date: 28/07/2025

1 December 2025

IMDA has issued the Direction to direct Singtel to modify particular provisions of its proposed revised RIO for IP-based interconnection for voice services.

IMDA’s Direction

Direction (255.73KB)

Appendix 1: Directed Modifications to the Main Body (1.17MB)

Appendix 2: Directed Modifications to Schedule 1 (1.14MB)

Appendix 3: Directed Modifications to Schedule 2A (381.05KB)

Appendix 4: Directed Modifications to Schedule 2B (401.44KB)

Appendix 5: Directed Modifications to Schedule 2C (498.30KB)

Appendix 6: Directed Modifications to Schedule 4A (366.61KB)

Appendix 7: Directed Modifications to Schedule 8A (572.17KB)

Appendix 8: Directed Modifications to Schedule 8 Attachments (674.15KB)

Appendix 9: Directed Modifications to Schedule 9 (729.02KB)

13 November 2025

IMDA has issued its decision on the Public Consultation on Singtel’s RIO for IP-based interconnection for voice services. IMDA has also issued a Notification of Direction to direct Singtel to modify particular provisions of its proposed schedules.

IMDA’s Decision

IMDA’s decision to the consultation (236.06KB)

IMDA’s Notification of Direction

Notification of Direction (268.52KB)

Appendix 1: Directed Modifications to the Main Body (1.17MB)

Appendix 2: Directed Modifications to Schedule 1 (1.14MB)

Appendix 3: Directed Modifications to Schedule 2A (381.05KB)

Appendix 4: Directed Modifications to Schedule 2B (401.44KB)

Appendix 5: Directed Modifications to Schedule 2C (498.30KB)

Appendix 6: Directed Modifications to Schedule 4A (366.61KB)

Appendix 7: Directed Modifications to Schedule 8A (572.17KB)

Appendix 8: Directed Modifications to Schedule 8 Attachments (674.15KB)

Appendix 9: Directed Modifications to Schedule 9 (729.02KB)

18 September 2025

At the close of the Public Consultation on Singtel’s RIO for IP-based interconnection for voice services, IMDA received the following submissions from the industry.

Cal4care Pte Ltd (81.41KB)

M1 Limited (199.30KB)

StarHub Ltd (225.48KB)

Symbio Networks Singapore Pte Ltd Response Letter (316.96KB) Specific comments to clauses (108.89KB)

Verizon Communications Singapore Pte Ltd (241.99KB)

Voxbone (Singapore Branch) (84.16KB)

28 July 2025

IMDA would like to seek views and comments on Singtel’s proposed preliminary RIO offer to implement IP-based interconnection for voice services.

IMDA Consultation Paper

Public Consultation Paper (134.36KB)

Singtel's Proposed Preliminary RIO Offer

Main Body (921.27KB)

Schedule 1 – Physical and Virtual (Distant) Interconnection (1,006.30KB)

Schedule 2A – Call Origination Service (204.31KB)

Schedule 2B – Call Termination Service (184.57KB)

Schedule 2C – Call Transit Service (302.08KB)

Schedule 4A – Emergency Call Service (162.48KB)

Schedule 8A – Co-location for Point of Interconnection (POI) (380.18KB)

Schedule 8 – Attachments (433.41KB)

Schedule 9 – Charges (525.04KB)

Schedule 12 – Dictionary (341.32KB)

All submissions should reach IMDA by 12 noon, 26 August 2025. All views and comments should be submitted in soft copy (in both Adobe PDF and Microsoft Word format). Respondents are required to include their personal/company particulars as well as their correspondence address, contact number and email addresses.

Submissions should be addressed to:

Aileen Chia (Ms)
Director-General (Telecoms & Post),
Deputy Chief Executive (Connectivity Development & Regulation)
Infocomm Media Development Authority
10 Pasir Panjang Road
#03-01 Mapletree Business City
Singapore 117438

Please submit soft copies, with the subject header “Consultation on RIO offer for IP interconnection”, via email to: Consultation@imda.gov.sg