SMPP Architecture & Components

As mentioned before, SMPP consists of a set of standardized components that enable the exchange of SMS messages between applications and mobile networks. The core components of SMPP include the ESME, the SMSC, and the SMPP Gateway.

ESME (External Short Message Entity):

An ESME is a non-mobile entity that communicates with an SMSC to send and receive SMS messages. Examples of ESMEs include web applications, email gateways, WAP gateways, and enterprise messaging systems.
ESMEs can function as: