Yes. The Westell 6100f is not a wireless modem, therefore, you will need to get a wireless router to connect wireless computers.
Or if your ISP is Verizon and you want a wireless modem/router, you may contact them and replace the Westell 6100f with a Westell Versalink 327w, or Westell 7500, or an Actiontec.
Answers & Comments
Yes. The Westell 6100f is not a wireless modem, therefore, you will need to get a wireless router to connect wireless computers.
Or if your ISP is Verizon and you want a wireless modem/router, you may contact them and replace the Westell 6100f with a Westell Versalink 327w, or Westell 7500, or an Actiontec.
Hope this helps!