NEC UNIVERGE SV8500 Setup Manual page 46

STEP 5: Select [General] tab on the [Edit Location] window, and set the dialing rules.
Set the dialing rules according to your using environment.
Note:
STEP 6: Exit the [Phone and Modem Options] window.
Now the modem setting on PCPro side has been complete.
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CHAPTER 3 Setting Up PCPro