Check my modem firmware / speed 

Moved to a new house at the beginning of this year.  Unfortunately, I have not been able to get my speeds up to par.  I have Premier 100Mbps, but only get around half that 50-60 on a good day.  I would like to double check the modem firmware which shows as a Cisco DSA321N which I got from Cox to support my phone and internet.  If it is good I will start replacing the line coming into the house to see if it helps. The installer patched into old coax that looked like it came from a satellite dish.  Thank you  Doug Twyman