UCP format and checksum

"ali hadim" <[email protected]>
Newsgroups gmane.comp.mobile.kannel.devel
Message-ID <038d01c44815$627c6890$0701010a@ali> 
Hello All,  I need litte help for UCP format UCP format has checksum and I couldn't understand can you tell me how it is rule?
because I will prepare project and will do encode and decode structure? For example,

00/00087/O/54/012345/0111111//////1/0654321/0100/////010197120501////3///////////////4C

"4C" ?

Thanks...
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