Here are the manual ticket entries that will generate to VS for your respective GDS system:

Amadeus:
OS VS TKNO 12345678901203-1NAME/A

Apollo:
@:30SIVSTKNM1234567890103-1NAME/A

Galileo:
SI.VS*TKNM12345678901203-1NAME/A

Sabre:
3OSI VS TKNO 12345678901203-1NAME/A

Worldspan:
3OSIVSTKNM12345678901203-1NAME/A