Satman and Hoosier want callerid from their landline that they don't pay to pass that info. Can't get it as Giqcass notes without taking other steps, discussed all over the forum.
Satman wants a simultaneous call on landline and GV for the OBi to answer the landline. I'm not an expert on all the fancy things you can do with an OBi, but I'd point out that the likelihood that both calls hit EXACTLY at the same time is near zero, hence it's a moot point. And likely impossible to do.