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

IMDA Reference Documents, Specifications and Guides are informative documents that adhere to IMDA regulations and are not used for the registration of customer equipment. They are either one of the following types of documents: 

  • Informative and interim documents on customer equipment standards which are yet to be adopted by the network operators and where standardisation is in progress
  • Informative documents describing network standards and practices adopted by the public telecommunication networks in Singapore
Reference Standards
Specifications, Documents, Guides  Date Title 
Jun 2023 Reference Specification for Quantum Key Distribution Networks (1.22MB) 
IMDA IoT CS Guide Annex C
Dec 2022 IMDA IoT Cyber Security Guide Annex C (750.74KB)
IMDA IoT CS Guide Mar 2020 IMDA IoT Cyber Security Guide (967.82KB)
IMDA IoT Cyber Security Guide Annex A (1.04MB)
IMDA IoT Cyber Security Guide Annex B (1.48MB)
IMDA RS IPv6 Oct 2016 Reference Specification for Internet Protocol version 6 (IPv6) Profile (996.53KB)
IMDA RS NGN Tech Framework Oct 2016
Reference Specification for Next Generation Networks (NGN) Technical Framework (816.35KB)
IMDA RS NTE Oct 2016
Reference Specification for NGNBN Network Termination Architecture and Requirements (793.03KB)
IMDA RD OFD   Reference Document for NGNBN - Optical Fibre Deployment
IMDA RD OFD - Part 1 Oct 2016
Fundamentals of Optical Fibre Communication (984.23KB)
IMDA RD OFD - Part 2 Oct 2016
Optical Fibre Cables and Field Installation (1.33MB)
IMDA RD OFD - Part 3 Oct 2016
Connecting and Splicing Fibres (1.44MB)
IMDA RD OFD - Part 4 Oct 2016
Testing and Monitoring of Passive Optical Access Networks (983.03KB)
IMDA RD OFD - Part 5 Oct 2016
FTTx components, Planning and Deployment (1.48MB)
IMDA RS PSTN/ISDN Evolution Oct 2016
Reference Specification for PSTN/ISDN Evolution to NGN (560.29KB)

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