Another way to do it, using split:

$a = "OPSms -N op01Sms1 -t SMS -T 0x70000000 -U op01/op011 -I sms1"; 
@a = split( /\s+-\w\s+/, $a); 
print "@a\n";

Output: 
OPSms op01Sms1 SMS 0x70000000 op01/op011 sms1
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You want $a[0], $a[1], $a[3]