Terminology

• SMS - Short Message Service i.e. text messages

• SMSC - Short Message Service Centre The system responsible for storing and forwarding messages

• MO - Mobile Originated A message on its way from a mobile or landline device to the SMSC

• MT - Mobile Terminated A message on its way from the SMSC to the mobile or landline device

• RX - Receive A message coming in to the Asterisk box

• TX - Transmit A message going out of the Asterisk box