Glossary

What is Transactional SMS?

Transactional SMS are non-promotional text messages triggered by user actions — order confirmations, OTPs, delivery updates, payment receipts, appointment reminders. In India, they can be sent 24/7 without time restrictions.

Transactional SMS in India use alphabetic sender IDs (e.g., IN-BRAND) and have higher delivery priority than promotional messages. They require DLT registration but are exempt from DNC filtering since recipients have an existing relationship with the sender.

InboxCentral's SMS API supports transactional SMS with high throughput, DLT compliance, delivery receipts, and fallback routing.

Related InboxCentral feature

SMS API

Related terms

DLT (Distributed Ledger Technology for SMS)

A mandatory registration system for commercial SMS in India.

Promotional SMS

Marketing text messages sent to promote products or offers.

Sender ID

The name or number displayed as the sender of an SMS message.

See it in action

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