[cisco-voip] CUCM pattern matching logic

[Cisco Voip]

Hi all.

 
I am trying to understand call routing logic of cucm.
 
I created 2 route patterns in cucm 7
 
2!
2XXX (with urgent priority)
 
Now  when i dialed 2001, i had to wait 15 seconds. The call wasnt routed as i  
expected. I opened up Troubleshooting cisco ip telephony book, and  according to 
that, i must calculate the possible results each route  pattern defines.
 
1) 2! for 2001 = 1000 combinations
2) 2XXX for 2001 = 1000 combinations.
 
Since they were equal, i can understand why urgent priority didnt work (pls 
correct me here if what i understood is wrong !!)\
 
Now i deleted the above and created 2 new patterns
 
1) 20!
2) 20XX (urgent priority)
 
Now when i dialed 2001, my call went immediately. Why is this so ?? if i 
calculate the combinations
 
1) 20! for 2001 = 100 combinations
2) 20XX for 2001 = 100 combinations
 
So why second route pattern was selected immediately ???
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