Fundamentals BroadNet answer

What is two-way messaging?

Last reviewed July 22, 20261 min readReviewed by BroadNet engineering

Quick answer

Two-way messaging is SMS (or another channel) that both sends to and receives replies from a recipient, so a customer can text back to confirm, opt out, ask a question, or trigger an action. It requires a number capable of receiving inbound messages — a long code, short code, or toll-free number — and a webhook to route replies into your application in real time.

Plain-language definitionVendor-neutralReviewed July 22, 2026

The long answer

Everything worth knowing, nothing that isn't.

§01

How replies reach you

When a customer replies, the inbound (mobile-originated) message is delivered to your application through a webhook, so you can process confirmations, keywords, and STOP requests programmatically. See /answers/what-is-mo-vs-mt and /answers/what-is-a-messaging-webhook.

§02

What number you need

Two-way traffic needs a number that can receive: a long code or toll-free number for lower volume, or a short code for high-throughput keyword campaigns. A one-way alphanumeric sender ID cannot receive replies. See /answers/what-is-long-code and /answers/what-is-short-code.

§03

What it enables

Appointment confirmations, delivery rescheduling, fraud-alert YES/NO responses, surveys, and conversational support all depend on two-way messaging. See /answers/sms-for-appointment-reminders and /products/two-way-sms.

§04

Keep it compliant

Always honour STOP and opt-out through the reply channel, and keep records of consent. See /answers/what-is-dnc and /answers/sms-compliance-checklist.

BNWritten by the BroadNet engineering team·Operating carrier-grade messaging since 2003, headquartered in Dubai·Editorial standards

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