MO Mobile Originated SMS (i.e. from mobile handset to SMSC) MT Mobile Terminated SMS (i.e. from SMSC to mobile handset) NACK Negative Acknowledgement NPI Numbering Plan Indicator PDU Protocol Data Unit SMPP Short Message Peer to Peer Protocol SMSC Short M

Short Message Peer-to-Peer (SMPP) in the telecommunications industry is an open, industry standard protocol designed to provide a flexible data communication interface for the transfer of short message data between External Short Messaging Entities (ESMEs

1#Regarding the password problem, I solved it by myself, but still I couldn't understant still. The problem was with the TON and NPI, he gave me wrong and when I change them into 1,1,1,1 it working fine, I am sending/receiving SMS as it has to be and