# MESSAGING

- [A2P SMS](/messaging/a2p-sms.md)
- [Overview](/messaging/a2p-sms/overview.md)
- [Start sending A2P SMS](/messaging/a2p-sms/start-sending-a2p-sms.md): Send and receive SMS through a single connection for timely and cost efficient communications.
- [Getting Started](/messaging/a2p-sms/getting-started.md): Summary
- [REST API](/messaging/a2p-sms/rest-api.md)
- [Overview](/messaging/a2p-sms/rest-api/overview.md)
- [Batches](/messaging/a2p-sms/rest-api/batches.md)
- [Delivery Reports](/messaging/a2p-sms/rest-api/delivery-reports.md)
- [Retrieve a delivery report](/messaging/a2p-sms/rest-api/delivery-reports/retrieve-a-delivery-report.md)
- [Webhooks](/messaging/a2p-sms/rest-api/webhooks.md): Callbacks
- [SMPP](/messaging/a2p-sms/smpp.md)
- [Connectivity](/messaging/a2p-sms/smpp/connectivity.md)
- [Sending Messages](/messaging/a2p-sms/smpp/sending-messages.md)
- [Message Encoding](/messaging/a2p-sms/smpp/message-encoding.md): Default SMSC Encoding
- [SMPP Error Codes](/messaging/a2p-sms/smpp/smpp-error-codes.md)
- [Two-Way SMS](/messaging/two-way-sms.md)
- [Overview](/messaging/two-way-sms/overview.md)
- [Start receiving Two-Way SMS](/messaging/two-way-sms/start-receiving-two-way-sms.md): Receive SMS using a Two-Way short code through a single connection for timely and cost efficient communications.
- [Start sending Two-Way SMS](/messaging/two-way-sms/start-sending-two-way-sms.md): Send SMS using a Two-Way short code through a single connection for timely and cost efficient communications.
- [Getting Started](/messaging/two-way-sms/getting-started.md): Summary
- [REST API](/messaging/two-way-sms/rest-api.md)
- [Overview](/messaging/two-way-sms/rest-api/overview.md)
- [Webhooks](/messaging/two-way-sms/rest-api/webhooks.md): Callbacks