Do I have to dial 9 to call out?

The following is from http://www.voip-info.org/wiki/view/CallManager+Express
It doesn't do away with dialing 9 but it translates the callerid number to allow you to return the call...

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By adding a translation rule to correct incoming calls caller ID information, you can remove the area code for local calls, and add a 1 for long distance calls. Add the following translation rule to your configuration then apply it to your incoming voice ports (i.e. FXO or PRI). This will enable you to correctly be able to place outgoing calls from the Missed Call/Received Calls directory. Replace 559 in the example with your area code. Remove the 9 if you don't need an outbound dial number.

voice translation-rule 1
rule 1 /^559\(.*\)/ /9\1/
rule 2 /\(..........\)/ /91\1/
!
voice translation-profile filter_559
translate calling 1
!
voice-port 1/0
translation-profile incoming filter_559
!
voice-port 1/1
translation-profile incoming filter_559

Hi Scott,
The system can be setup where you don't have to dial the 9 and this is typically referred to as a keysystem mode of setup.
In keysystems you typically dedicate a shared line button on each phone for each outgoing line. When you move to a digital trunk such as a T-1 PRI you now have 23 "lines" or channels. It is now inefficient to dedicate a button for each line so we use an access code like a 9 to indicate an off network call. Also with a PRI-t1 you can have direct inward dialing(DID) where every extension has a REAL phone number.

The above was general background . . . Now to answer your question. . . .
Yes the system can be setup so you don't have to dial a nine.

Hope that helps,

Ted