I tried to set up an RAD Hunt Group and use it for my ACD path.
This is what I did:
(ACD Path Directory Number: 8199; RAD Hunt Group: 6000; RAD VM Port Directory Number: 6001)
Detailed provisioning:
* COS:
   COS Number: 4;
   Comment: RAD
   COV/ONS/E&M Voice Mail Port:   No
   Recorded Announcement Device: Yes
   Recorded Announcement Device - Advanced: Yes
   Answer Plus Delay to Message Timer: 5
   Answer Plus Expected Off-hook Timer: 128
   Answer Plus Message Length Timer: 15     (Actual recorded announcement length is between 5-10 sec)
   Ringing Timer: 60
  
* VM Ports:
   Port ID: 20     Primary Directory Number: 6001
   (6001 is taken OUT OF embedded voice mail Hunt Group)
* Station Attributes:
   Number: 6001
   Intercept Number: 1 (default)
   COS(Day/Night1/Nigh2): 4
   COR(Day/Night1/Nigh2): 1 (default)
* Hunt Group:
  Hunt Group: 6000
  Hunt Group Mode: Terminal
  COS(Day/Night1/Nigh2): 4
  Priority: 64
  Hunt Group Type: RAD
  Phase Timer Ring: 1
  Member:
  Index: 1
  Number: 6001
  Presence: Present
* VM RAD Greetings
   RAD Set: 10
   Greeting 1: 1
   Greeting 2: 2
   Greeting 3: 3
   Times to Play: 1
(I've verified using the System Admin mailbox tool that the RAD number 1-3 are recorded/uploaded correctly).
* VM Greetings:
  Port ID: 20
  Greeting: RAD Set 10
* ACD Path:
  Path Directory Number: 8199
  Path Reporting Number: 251
  Path Options:
  Priority: 64
  Primary Agent Skill Group ID: 1 (ACD group 1 is working, without RAD/MOH though)
  Recording 1 Delay to Start Minutes:  empty
  Recording 1 Delay to Start Seconds: 10
  Recording 1 Directory Number: 6000
  Audio Settings:
   Audio Source: None
  
  Rest are default values
Now I tried the following
 1. Dial DID for 8199 from outside through SIPT
 2. Dial 6000 from internal phone
 3. Dial 6001 from internal phone
All I get were nothing but ringback tones. Looks like the RAD voice mail port (6001) is never opened. I adjusted my timer to avoid the DND situation (mentioned in some other posts). I've been trying this for a day and still can't get my RAD working.
Am I missing anything or did anything wrong? Or is there any System Options I need to adjust?
BTW, I don't have Analog License on my 3300 but I don't think it should matter. Also, Embedded voice mail/MLAA works fine.
Thanks a lot