How to Set up the Service with a FIOS Internet Connection

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Both Verizon and AT&T offer fiber optic Internet service (FiOS and U-Verse respectively). The phone service will function with either service with only a minor setup time.


First, leave the Grandstream powered off.

  • Connect the Ethernet cable provided with the device to a numbered port on the modem/router you have there.
  • Connect the other end of the cable connects to the WAN port of the Grandstream.
  • Power on the Grandstream.
  • Connect a standard analog touch tone telephone to the phone port 1 of the Grandstream.

Look at the modem you have and identify the exact make/model. Once you have the exact make/model of the modem you received from the ISP, refer to the Customer Provided Routers category for information on how to configure your modem to function with our service.


If you are unable to place a call after completing the above instructions, please contact our support department for additional assistance.