With the limited information you've provided, can only say, in general, your primary link path is considered the best and/or single BGP path to your Internet IP(s). Likely your secondary link path might accept ingress traffic if the primary link failed.
What you might do, to use both links for ingress, would depend on whether there's one ISP or two different ISPs on those links, and often cooperation from your ISP(s) to use both links.
If your public IP allocation is larger than a /24, you might also have the option to have your links preferred for different /24s.
As to might whether your current situation might impact Internet and/or voice, well often two links provide more aggregate bandwidth, supporting both traffic types better, but if your overall primary link's ingress usage is low, taking advantage of the secondary link might make little difference.
