Carlos Vinicio Guevara

FTEU (Free to End User) enables enterprises to send messages in a way that ensures the end user does not get charged by the mobile operator. These fees are paid by the content provider/customer, th...

A final positive notification is returned when the message has been delivered to the operator or SMS-C (when no handset Ack is requested or the operator does not support handset Ack) or to the hand...

A Final Negative notification is returned when a message cannot be delivered and a retry will not be attempted. The returned status code indicates to the customer whether the message is retriable o...

The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute to regulate interstate communications by radio, television, wire, satellite, ...

Embedded Universal Integrated Circuit Card (eUICC) is a GSMA standard for changing operators on a SIM card without replacing the SIM.

European Telecommunication Standards Institute - ETSI is an independent, not-for-profit, standardization organization in the field of information and communications. ETSI supports the development a...

Eastern Standard Time - EST is 5 hours behind of Coordinated Universal Time (UTC), that is, it's time offset is UTC-5.

External Short Message Entity. The ESME receives a message from a customer. A connection is established with an SMSC, and then that message forwarded on to the SMSC for delivery to a destination re...

End of Message (from ITU T.30) – indicates the end of a page.

Electronic Numbering Mapping is a protocol used to translate E.164 telephone numbers (that is, standard telephone numbers like +447786852522) into a format that can be used in Internet communications.