tkuo – welcome to the forum.
Your problem is most likely concerned with Primary Lines. These are the lines that you can dial with no ** codes. The default setting for the OBi110 is:
Physical Interfaces > PHONE Port > PrimaryLine: PSTN Line
Voice Service > Auto Attendant > PrimaryLine: PSTN Line
When you set up GV, you probably chose for it to be your Primary Line. Assuming that you set up GV on sp1, this will have changed your settings to:
Physical Interfaces > PHONE Port > PrimaryLine: SP1 Service
Voice Service > Auto Attendant > PrimaryLine: SP1 Service
When AA asks for the phone number, try dialling **82222-9999# This should route the calls to the PSTN Line.
If you would like to have GV as your Primary Line for your Phone Port and PSTN as your Primary Line for the AA, then you need to set:
Physical Interfaces > PHONE Port > PrimaryLine: SP1 Service
Voice Service > Auto Attendant > PrimaryLine: PSTN Line
In this case you will not need to dial **8 when using AA for PSTN calls. However, If you dial from the Phone Port to the PSTN line, then you will need to dial **8.
I hope that's not too confusing!
Make the changes via the OBi Expert Configuration pages. From your OBi Dashboard, click on your OBi number and follow the prompts to get there. To change a value uncheck both boxes to the right of the value and leave them unchecked. After changing the values on one page, press submit at the bottom of the page and wait a few minutes for the OBi to reboot.