A system for delivering SMS messages to a mobile terminal includes an apparatus
and method that deliver the SMS messages either using legacy SMS message formats
or data packet formats. Additionally, a connection is created between a message
center and a gateway GPRS support node wherein SMS messages may be transmitted
to the gateway GPRS support node in a data packet format. To provide this capability,
the gateway GPRS support node includes a unique port address for receiving SMS
messages and circuitry for processing SMS messages received in a data packet format.
A serving GPRS support node is formed to include circuitry for determining whether
to transmit the SMS message to the mobile terminal in a data packet format or in
a legacy SMS message format and to receive the message regardless of the path utilized
by the message center to transmit the message.