I have done plenty of research and found that Comcast Business Class service does support the Motorola SB6121 modem. I have not been able to find any info regarding if this modem can be used if the Business user has the 5 static ip package. Any info would be greatly appreciated.
Welcome Mcamacho. While the Motorola SB6121 is a supported device for Business Class customers, it is not compatible with any of the static IP packages. Routing is via the WAN DHCP IP address. Also as a standalone modem, it is a true bridge device and remote management is not available.