Bambang Sadikin schrieb:
dear All :
has anyone put or starting to put ussd protocol stack in kannel software
systems ?
the USSD subystem as defined by GSM 03.90 spec is "beyond" the IP layer on which
Kannel interacts with the SMSCs of a network. In fact USSD is more related to
the MAP/TCAP signaling layer (ss7), then on the pure SMSC inter-connection.
Some protocols, i.e. SMPP v3.4 allow connecting to USSD gateways (or other
network elements) that provide a SMPP interface to the USSD string exchange. But
this depends on the capabilities of the SMPP server.
There is no standardized IP based protocol to use for USSD gateway connectivity.
So most USSD gateway vendors use their own protocol, or try to use a well-known,
like XML over HTTP (SOAP) or SMPP.
Stipe
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