Siemens Optiset E Standard phones, available refurbished, for your Siemens Hicom system. Optiset E Standard Features: 12 LEDs/ Keys, 12 Line Appearances, 3 Optiguide Context Sensitive Keys. 2 Volume Keys.
In IT, Short Message Peer-to-Peer (SMPP) is a type of protocol that allows for the transmission of a significant volume of SMS text messages. Typically, SMS text messages go through an SMPP, which can be used to connect external systems to a message center handling high SMS volumes.
SMTP redirects here. For the email delivery company, see SMTP (company). Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (email) transmission. First defined by RFC 821 in 1982, it was last updated in 2008 with Extended SMTP additions by RFC 5321, which is the protocol in widespread use today.