Be aware of scammers impersonating as IMDA officers and report any suspicious calls to the police. Please note that IMDA officers will never call you nor request for your personal information. For scam-related advice, please call the Anti-Scam helpline at 1800-722-6688 or go to www.scamalert.sg.

RIO Agreements with Facilities-Based Operators (FBOs)

Facilities-Based Operators (FBOs) in Singapore must comply with IMDA’s regulations by providing Reference Interconnection Offer (RIO) agreements.

1. Singapore Telecommunications Ltd & SingTel Mobile Pte Ltd

RIO Agreement Date of Submission
SingTel Mobile Main Body (185.82KB) 9 March 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 4A - Emergency Services
Schedule 5B - Licensing of Tower Space & Co-location Space at Tower Sites
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

2. Singapore Telecommunications Ltd & SingTel Paging Pte Ltd

RIO Agreement Date of Submission
SingTel Paging Main Body (185.83KB)
9 March 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 4A - Emergency Services
Schedule 5B - Licensing of Tower Space & Co-location Space at Tower Sites
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

3. Singapore Telecommunications Ltd & M1 Limited

RIO Agreement Date of Submission
SingTel M1 Main Body (2.64MB)
14 March 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 4A - Emergency Services
Schedule 4B – Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct and Lead-in Manholes
Schedule 8D - Co-Location at Submarine Cable Landing Station 
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

4. Singapore Telecommunications Ltd & Digital Network Access Communications Pte Ltd

RIO Agreement Date of Submission
SingTel DNA Main Body (185.74KB)
15 March 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 4A - Emergency Services
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

5. Singapore Telecommunications Ltd & MCI Worldcom Asia Pte Ltd

RIO Agreement Date of Submission
SingTel Worldcom Main Body (181.66KB)
5 April 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 3A - Licensing of Local Loop/Sub-Loop
Schedule 3B - Line Sharing
Schedule 3C - Sale of Internal Wiring
Schedule 3D - Licensing of Building MDF Distribution Frame
Schedule 4A - Emergency Services
Schedule 4B - Submarine Cable Connection Services
Schedule 5A - Licensing of Lead-in Duct & its Associated Lead-in Manholes
Schedule 6 - Number Portability
Schedule 7A - Wholesale Local Leased Circuits (Full Circuits)
Schedule 7B - Wholesale Local Leased Circuits (Tail Circuits)
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI)
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

6. Singapore Telecommunications Ltd & StarHub Ltd

RIO Agreement Date of Submission
SingTel StarHub Main Body (368.38KB)
26 April 2001
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 3A - Licensing of Local Loop/Sub-Loop
Schedule 3B - Line Sharing
Schedule 3C - Sale of Internal Wiring
Schedule 3D - Licensing of Building MDF Distribution Frame
Schedule 4A - Emergency Services
Schedule 4B - Submarine Cable Connection Services
Schedule 4C - IRS Tail Circuit Service
Schedule 5A - Licensing of Lead-in Duct and Lead-in Manholes
Schedule 7A - Wholesale Local Leased Circuits (Full Circuits)
Schedule 7B - Wholesale Local Leased Circuits (Tail Circuits)
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI)
Schedule 8B - Co-location for Point of Access (POA)
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

7. Singapore Telecommunications Ltd & GlobalOne Communications Pte Ltd (Novated to France Telecom Long Distance-Singapore Pte Ltd on 19 June 2002)

RIO Agreement Date of Submission
SingTel GlobalOne Main Body (187.47KB)
4 May 2002 (novated on 19 June 2002)
Schedule 1 - Physical and Virtual Interconnection
Schedule 1A - Call Origination Service
Schedule 2 - Origination, Termination and Transit (O/T/T)
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 2C - Call Transit Service
Schedule 4A - Emergency Services
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct and Lead-in Manholes
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI)
Schedule 8B - Co-location for Point of Access (POA)
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

8. Singapore Telecommunications Ltd & Reach International Telecom (S) Pte Ltd

RIO Agreement Date of Submission
SingTel Reach Main Body (180.98KB)
3 June 2002
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct & its Associated Lead-in Manholes
Schedule 7A - Wholesale Local Leased Circuits (Full Circuits)
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

9. Singapore Telecommunications Ltd & Cable & Wireless Global Pte Ltd

RIO Agreement Date of Submission
SingTel C&W Main Body (2.48MB)
15 July 2005
Schedule 4B - Submarine Cable Connection Service
Schedule 7A – Wholesale Local Leased Circuits (Full Circuits)
Schedule 8 - Co-location
Schedule 8 - Attachments
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution

10. Singapore Telecommunications Ltd & BlueTel Networks Pte Ltd

RIO Agreement Date of Submission
SingTel BlueTel Main Body (436.99KB)
29 July 2005
Schedule 3A - Licensing of Local Loop/Sub-Loop
Schedule 3B - Line Sharing
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct & its Associated Lead-in Manholes
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI)
Schedule 8B - Co-location for Point of Access (POA)
Schedule 8D - Co-Location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

11. Singapore Telecommunications Ltd & BT Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel BT Main Body (212.04KB)
26 September 2006
Schedule 4B - Submarine Cable Connection Service
Schedule 7A - Wholesale Local Leased Circuits (Full Circuits)
Schedule 7B - Wholesale Local Leased Circuits (Tail Circuits)
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI)
Schedule 8B - Co-location for Point of Access (POA)
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

12. Singapore Telecommunications Ltd & C2C Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel C2C Main Body (209.15KB)
22 May 2007
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

13. Singapore Telecommunications Ltd & Telecom Italia Sparkle Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel Telecom Italia Main Body (395.63KB)
14 June 2007
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

14. Singapore Telecommunications Ltd & TATA Communications International Pte Ltd (formerly VSNL International Pte Ltd)

RIO Agreement Date of Submission
SingTel TATA Main Body (139.49KB)
21 September 2007
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

15. Singapore Telecommunications Ltd & Bharti International (Singapore) Private Limited

RIO Agreement Date of Submission
SingTel Bharti Main Body (396.50KB)
23 April 2008
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

16. Singapore Telecommunications Ltd & AT&T Worldwide Telecommunications Services Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel AT&T Main Body (140.50KB)
22 August 2008
Schedule 4B - Submarine Cable Connection Service
Schedule 5C - Licensing of Roof Space & Co-location Space at Roof Sites
Schedule 5B & 5C Attachments
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

17. Singapore Telecommunications Ltd & HKT Global (Singapore) Pte Ltd

RIO Agreement Date of Submission
SingTel HKT Global Main Body (211.10KB)
27 October 2010
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

18. Singapore Telecommunications Ltd & Indosat Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel Indosat Main Body (211.50KB)
7 January 2011
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

19. Singapore Telecommunications Ltd & China Telecom (Singapore) Pte Ltd

RIO Agreement Date of Submission
SingTel China Telecom Main Body (210.91KB)
24 August 2011
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct and Its Associated Lead-in Manholes
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

20. Singapore Telecommunications Ltd & Viewqwest Pte Ltd

RIO Agreement Date of Submission
SingTel Viewqwest Main Body (231.13KB)
11 June 2012
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

21. Singapore Telecommunications Ltd & OpenNet Pte Ltd

RIO Agreement Date of Submission
SingTel OpenNet Main Body (185.94KB)
21 August 2013
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 - Co-location
Schedule 8B – Access to Mandated Services
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

22. Singapore Telecommunications Ltd & Reliance Jio Infocomm Pte Ltd

RIO Agreement Date of Submission
SingTel Reliance Jio Main Body (502.78KB)
23 October 2013
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

23. Singapore Telecommunications Ltd & MyRepublic Limited

RIO Agreement Date of Submission 
SingTel MyRepublic Main Body (564.01KB)
 29 April 2014
Schedule 1 - Physical and Virtual (Distant) Interconnection
Schedule 1 - Annexures 
Schedule 2A - Call Origination Service
Schedule 2B - Call Termination Service
Schedule 4A - Emergency Call Service
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

24. Singapore Telecommunications Ltd & Google Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel Google Main Body (574.33KB)
3 December 2014
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct & Lead-in Manholes
Schedule 8 - Co-location
Schedule 8A - Co-location for Point of Interconnection (POI) or Point of Access (POA)
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 8 - Attachments
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary
Schedule 13 - Licensing of CDN

25. Singapore Telecommunications Ltd & SuperLoop (Singapore) Pte Ltd

RIO Agreement Date of Submission
SingTel SuperLoop Main Body (322.51KB)
10 September 2015
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-in Duct & Lead-in Manholes
Schedule 8 - Co-location
Schedule 8 - Attachments
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

26. Singapore Telecommunications Ltd & SP Telecommunications Pte Ltd

RIO Agreement Date of Submission
SingTel SP Tel Main Body (419.75KB)
17 April 2017
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

27. Singapore Telecommunications Ltd & China Mobile International (Singapore) Pte Ltd

RIO Agreement Date of Submission
SingTel China Mobile Main Body (1.93MB)
31 July 2017
Schedule 4B - Submarine Cable Connection Service
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 - Co-location
Schedule 8 - Attachments
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary
Schedule 13 - Licensing of CDN

28. Singapore Telecommunications Ltd & TE Globe Pte Ltd

RIO Agreement Date of Submission
SingTel TE Globe Main Body (419.82KB)
28 September 2017
Schedule 4B - Submarine Cable Connection Service
Schedule 8 - Co-location
Schedule 8 - Attachments
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

29. Singapore Telecommunications Ltd & Colt Technology Services Pte Ltd

RIO Agreement Date of Submission
SingTel Colt Main Body (424.75KB)
17 October 2017
Schedule 4B - Submarine Cable Connection Service
Schedule 5A - Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 - Co-location
Schedule 8 - Attachments
Schedule 8D - Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

30. Singapore Telecommunications Ltd & TPG Telecom Pte Ltd

RIO Agreement Date of Submission
SingTel TPG Main Body (11.13MB)
24 January 2018
Schedule 1 – Physical and Virtual (Distant) Interconnection
Schedule 1 – Annexures
Schedule 2 – Origination, Termination and Transit (O/T/T)
Schedule 2A – Call Origination Service
Schedule 2B – Call Termination Service
Schedule 2C – Call Transit Service
Schedule 4A – Emergency Call Service
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

31. Singapore Telecommunications Ltd & SuperInternet Access Pte Ltd

RIO Agreement Date of Submission
SingTel SuperInternet Main Body (1.66MB) 27 November 2018
Schedule 1 – Physical and Virtual (Distant) Interconnection
Schedule 1 – Annexures
Schedule 2 – Origination, Termination and Transit (O/T/T)
Schedule 2A – Call Origination Service
Schedule 2B – Call Termination Service
Schedule 2C – Call Transit Service
Schedule 4A – Emergency Call Service
Schedule 5A - Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 – Co-location
Schedule 8 – Attachments
Schedule 8A – Co-location for Point of Interconnection (POI) or Point of Access (POA) 
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

32. Singapore Telecommunications Ltd & Telekomunikasi Indonesia International Pte Ltd 

RIO Agreement Date of Submission
SingTel Telin Main Body (1.83MB) 7 April 2020
Schedule 3A – Licensing of Local Loop/Sub-Loop
Schedule 3D – Licensing of Building MDF Distribution Frame
Schedule 4B – Submarine Cable Connection Service
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 – Co-location
Schedule 8 – Attachments
Schedule 8A – Co-location for Point of Interconnection (POI) or Point of Access (POA) 
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 - Charges
Schedule 10 - Billing
Schedule 11 - Dispute Resolution
Schedule 12 - Dictionary

33. Singapore Telecommunications Ltd & Etisalat Wholesale Asia Pacific Pte Ltd

RIO Agreement Date of Submission
SingTel Etisalat Main Body (1.97MB) 26 August 2020
Schedule 1 – Physical and Virtual Interconnection
Schedule 4B – Submarine Cable Connection Service
Schedule 8 – Co-location
Schedule 8 – Attachments
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary

34. Singapore Telecommunications Ltd & NTT Communications World Network (S) Pte Ltd

RIO Agreement Date of Submission
SingTel NTT Main Body (11.91MB) 6 August 2021
Schedule 4B – Submarine Cable Connection Service
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes
Schedule 8 – Attachments
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary
Schedule 13 – Licensing of CDN

35. Singapore Telecommunications Ltd & HBC Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel HBC Main Body (1.37MB) 25 February 2022
Schedule 4B – Submarine Cable Connection Service
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary

36. Singapore Telecommunications Ltd & Keppel Midgard Holdings Pte Ltd

RIO Agreement Date of Submission
SingTel Keppel Main Body (11.89MB) 7 March 2022
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary
Schedule 13 – Licensing of CDN 

37. Singapore Telecommunications Ltd & Xenith IG Singapore Pte Ltd

RIO Agreement Date of Submission
SingTel Xenith Main Body (11.85MB) 4 July 2022
Schedule 4B – Submarine Cable Connection Service
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes 
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary

38. Singapore Telecommunications Ltd & Cloud Telecommunications (S) Pte Ltd

RIO Agreement Date of Submission
SingTel Cloud Main Body (1.89MB) 10 October 2022
Schedule 4B – Submarine Cable Connection Service
Schedule 5A – Licensing of Lead-In Duct and Lead-In Manholes 
Schedule 8A – Co-location for Point of Interconnection (POI) or Point of Access (POA)
Schedule 8D – Co-location at Submarine Cable Landing Station
Schedule 9 – Charges
Schedule 10 – Billing
Schedule 11 – Dispute Resolution
Schedule 12 – Dictionary

LAST UPDATED: 03 OCT 2023