A2P SMS, from first code to production
Send your first verification code and grow into production traffic: the concepts in order, each short enough for one sitting, ending where integration and procurement start.
8 lessons
- What is A2P SMS? Business messaging
How application-to-person messaging differs from personal texting, what a delivery receipt really reports, and what to check before you send.
- What is SMPP? The SMS session protocol
SMPP explained without the jargon: binds, windows, PDUs and the receipt path, and why the session shape matters at volume.
- SMPP vs HTTP: which connection fits
A persistent SMPP session against per-request HTTP calls: throughput, receipts, callbacks and the failure modes that decide the choice.
- Sender IDs in Mexico and Brazil explained
How sender identity works in Mexico and Brazil: alphanumeric senders, short codes and long numbers, and the registration each path needs.
- OTP SMS delivery and fraud
Where one-time passwords leak, what a delivery receipt can and cannot tell you, and the controls and metrics that keep an OTP flow working.
- Connecting over SMPP and HTTP
Take a test route to production without breaking binds, windows or receipts: bind, throughput, keep-alive, encoding, callbacks and failure handling.
- How to choose an A2P SMS provider
A supplier evaluation that produces evidence: traffic first, route transparency, sender registration, handset testing and a fallback plan.
- How SMS route testing works
What a handset route test measures, what it cannot prove, how a sample report is built and how to read a failure.