The traditional way for restaurants to receive 3rd party online ordering system is no longer the only way (check out my article here for the different ways to receive third-party online orders). With the right POS system, you can have online orders from all systems (GrubHub, Eat24, etc.) send directly to the point-of-sale.
One of the two common POS partners that help with this is ItsaCheckmate. Check out the link here to access a video on how it works.
Which point-of-sale (POS) systems have partnered with ItsaCheckmate?
Not every POS system has a partnership with ItsaCheckmate to streamline online ordering. Check out the image below to find out whether your current point-of-sale has this partnership available.