Not without much more help from you.
Not clear if the call does not get established at all or if it does but then disconnects.
How are you attempting to make the call? Via a SIP ITSP, via GoogleVoice or via direct IP calling?
Is it only failing in one direction or does calling from either OBi110 not work?
What testing have you already done and with what results?
And posting in the wrong section of the forum does not improve your chances of getting help.