Key takeaways
- Calls suit urgent, high-importance or low-literacy situations.
- Outbound IVR can collect a keypad response, not just play a message.
- Calls follow consent and DND rules, so use them for messages customers expect.
- Pair voice with SMS or WhatsApp so the details are also in writing.
When a call is the better choice
- The message is time-critical, such as a delivery that needs someone at home.
- The customer rarely reads or answers texts.
- An OTP did not arrive by SMS and a voice fallback is needed.
- You need a yes or no, collected by keypad.
Outbound voice notifications
An outbound voice notification calls a list or a single customer and plays a recorded or text-to-speech message. Common uses are payment due reminders, appointment reminders, delivery notices and event announcements. Add a keypad option such as "press 1 to confirm" to turn a one-way message into a response. See our bulk voice call service and automated reminder calls.
Where IVR fits
IVR handles the replies and the inbound calls that follow: confirming an appointment, giving a status, or routing the caller to an agent. Our guide on how IVR works explains menus and call flows, and the IVR service page covers setup.
Run it responsibly
- Call only people who expect the call and have agreed to it.
- Follow TRAI rules for commercial calls, including customer preferences and calling hours.
- Keep the message short and state who is calling in the first seconds.
- Offer a way to stop future calls.
- Send the key details by SMS or WhatsApp as well.
Sources and further reading
Rules and platform requirements change. Last reviewed . This guide is general information, not legal advice.