SMS Technical Information

HTTP Interface

A detailed reference on using the HTTP interface to send and receive SMS messages.

Information on using the SMPP interface to send and receive SMS messages.

How to interpret delivery report status codes returned by the SMS Gateway.

The retry strategies used by the SMS Gateway under various error conditions.

Single-shot billing: what it means and how to enable it.

Which carriers support refund notifications and how to enable and interpret them.

Which carriers support renewal notifications and how to enable and interpret them.