Known Issues

  1. SIP ALG is enabled by default and Verizon/Frontier has not provided a method for the end user to disable SIP ALG. It is not known if Verizon/Frontier has the capability to disable SIP ALG remotely.
  2. DNS servers need to be configured to a set of efficient DNS servers in order to prevent issues with registration on Polycom phones.


  1. Contact Verizon/Frontier and inquire about the possibility of disabling SIP ALG.
  2. If SIP ALG cannot be disabled, call Verizon or Frontier to have a replacement FiOS Router installed (only replacement option currently is the Actiontec MI424).