How to switch primary number to call out

[Mann]

Hi, I setup line 1 to use google voice, line 2 to use HK2B and line 2 is for primary number to call out, how can I make call and use line 1 to call out without go to the setting each time?

Thanks,

[RonR]

You dial **1 + number to use SP1 instead of SP2.

[Mann]

It doesn't work for me, it just call the phone that I attached to OBi device.  Any where I can look up more information on this?

[RonR]

Any where I can look up more information on this?

OBi Device Administration Guide