Guanghua Hou wrote:
> 
> When push message is sent through SMSC. SMPP v3.4 'submit_sm' is used by
> kannel. Kannel sets 'service_type'as NULL and 'protocol-id' as zero.The
> short message is WDP/WSP encoded PDU.
> 
> When this message is sent to Terminal, how does the terminal distinguish
> application type of short message? How does the terminal know this message
> is WAP push message?  Maybe the terminal treates it as normal short message
> of ascii.

by the UDH header. Within the UDH header you specify the receiver port
(like a socket port on regular machines). 

Check our the UDH headers sequence when pushing a SL or SI document
via Kannel's PPG.

Stipe

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