Andrew Bonwick
Vice President of Product Development at Relm Insurance
Madhav Sheth
CEO of Ai+ Smartphone
Stephen Rose
CEO Render Networks


Under the TRAI (Telecom Regulatory Authority of India) DND service, mobile subscribers can register their phone numbers on a National Do Not Call (NDNC) registry. Once a phone number is registered, telemarketers are prohibited from sending promotional messages or making unsolicited calls to that number. The NDNC registry is regularly updated, and telemarketers are required to comply with the regulations or face penalties. The TRAI DND ( Do Not Disturb) service is available to all Indian mobile subscribers, regardless of their mobile network operator.
To further strengthen the DND service and curb messages from unauthorised or unregistered telemarketers, including telemarketers using telephone numbers, TRAI has directed Access providers to ensure that all promotional messages are sent through Registered Telemarketers (RTMs) using approved Headers and Message Templates on Distributed Ledger Technologies (DLT) platform.
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Also, to stop the misuse of Headers and Message Templates, TRAI has issued two separate Directions to Access Service Providers under the Telecom Commercial Communication Customer Preference Regulations, 2018 (TCCCPR-2018) and the Telecom Regulatory Authority of India Act 1997 (24 of 1997).
Usage of Headers and Message Templates of Principal Entities (PEs):
Access Providers have been directed to:
- Reverify all registered Headers and Message Templates on the DLT platform and block all unverified Headers and Message Templates within 30 and 60 days, respectively.
- Ensure that temporary Headers are deactivated immediately after the time duration for which such headers were created.