External Machine Interface definition protocol
(EMI) A protocol
primarily used to connect to short message service
centres for mobile telephones
. EMI is an extension to Universal Computer Protocol (UCP). EMI was was developed by CMG, now a part of LogicaCMG, the current SMSC market leader.
Each byte of the message is encoded as two hexadecimal
characters using an encoding not quite like ASCII
EMI specification (http://www.netfunitalia.it/downloads/SMSC_EMI_Specification.PDF)