if you find any SMSC which implements this and provide SIM cards to
test this, it could be implemented.
However this is a very very rare feature. I have not seen any SMSC on
the market supporting this. I know in THEORY SMPP has some stuff in
there for USSD but in practice, USSD is very different from SMS as it
is transactional based, not message based. I think the designers of
SMPP simply had in mind that the same protocol could be used but to a
different type of machine, a USSD Service Center (or how ever you want
to call it). All USSD solutions I have seen so far where directly SS7
based and attached to the HLR.
On 05.06.2008, at 09:09, Yury.Mikhienko wrote:
Stipe Tolj wrote:
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
TLV_OCTETS(its_session_info, 2, 2) in PDU submit_sm can provide to
hold USSD session
--
Best regards,
Yury Mikhienko.
Mobicom-Kavkaz CJSC
mob: +7 (928) 2010199
tel: +7 (863) 2704299
HiCom: 3823
