SMS REFERENCE MATERIAL: Used in my work developing an SMS gateway server service
The SMS Forum hosts reference documents, sample code and online discussion forums.
Useful acronyms:
ESME: Extended Short Message Entity (client [i.e. cell phone])
PDU: Protocol Data Unit (packet of SMPP-formatted data)
SMPP: Short Message Peer-to-Peer (protocol)
SMS: Short Message Service
SMSC: Short Message Service Center
PERIODICALS