New Modem Question

I am looking at getting the Motorla MG7540, instead of paying 16.95 a month for my current modem through Comcast.  It is on the list of modems that will work with my service.  I don't use VOIP through Comcast, but have a VOIP service through Intermedia.  It uses an ethernet cable, rather than a standard phone jack.  Will this modem work so I can continue to use my internet and VOIP setup?