Protocols BroadNet answer

What is SMPP?

Last reviewed July 20, 20261 min readReviewed by BroadNet engineering

Quick answer

SMPP (Short Message Peer-to-Peer) is the open-protocol standard for exchanging SMS between SMSCs, ESMEs (External Short Message Entities), and aggregators. Version 3.4 is the most widely deployed; 5.0 adds Unicode-clean headers. BroadNet supports both via plain TCP and TLS.

Plain-language definitionVendor-neutralReviewed July 20, 2026

DiagramAn SMPP session between your platform and BroadNet

Your platform (ESME)

BroadNet SMSC

One persistent TCP/TLS connection

bind_transceiverOpen and authenticate the session
bind_transceiver_respSession accepted
submit_smSend a message
submit_sm_respAccepted, message ID returned
deliver_smDelivery receipt or inbound message
deliver_sm_respAcknowledged
enquire_linkKeepalive while idle

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References

Source documents we cite.

Standards bodies and regulators referenced in this page. Open in a new tab.

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