2 extensions, 2 single line phones

Hi
One Ooma office Base Station, 2 Linx (Extensions)
Main Number 4947 (cordless, 2 handset, single line phone)

Secondary Number 8778

When in call on Main Number, 4947, callers automatically transferred to 8778 Number on (5) rings??

Possible,in Ooma Office settings, or need a 2 line cordless setup??

Thanks
Kerri