Configuring a CenturyLink Actiontec Q2000

The ideal network involves your Internet Service Provider (ISP) connecting onsite to a stand-alone modem that connects to a router, preferably a router recommended to you from Nextiva. If you have more devices on your network than ports on your router, you can connect a switch to your router to expand the number of ports.

There are two main areas that you should be concerned with regarding your Century Link Actiontec Q2000 Gateway. They are:

SIP ALG: Nextiva uses port 5062 to bypass SIP ALG, however, the CenturyLink Actiontec Q2000 Gateway doesn’t allow changing the SIP firewall rule port to 5062 for Secure SIP, which Nextiva phones use.  Custom rules cannot be created as well so the software firewall needs to be disabled.

DNS Server Configuration: If the DNS server being used is not up to date and consistent, devices (Poly phones in particular) can become deregistered. Nextiva always recommends using the Google DNS servers of and



Disable SIP ALG

DNS Server Configuration


To Disable SIP ALG:


  1. Log into the router by navigating to the Default Gateway IP address, typically
  2. Enter the default login credentials provided by your ISP. The credentials are usually located on a sticker on the router. The manufacturer’s default username is admin, and the default password is password.
  3. Select Advanced Setup, then select Security on the left-hand side of the page.
  4. Select Firewall, then disable both Stealth Mode and Security Level.
  5. Enter the following URL into the address bar of your web browser:
  6. Select SIP ALG, uncheck SIP ALG, and then select Apply to save changes.
  7. Select Advanced Setup at the top of the page.
  8. Select DHCP Settings under IP Addressing.
  9. Under “Set the DHCP server state“, verify DHCP Server is set to Enable.


NOTE: If it is set to Disable, find out what the DHCP server is on your network. It will likely be another device on the network such as a Windows Server or another router. 


  1. Scroll down to “Automatically set DHCP reservations on DHCP IP allocation” and select Disable.


To Configure DNS Servers (Primarily for Poly Devices to Prevent Deregistrations):


  1. Under DHCP Settings, scroll down to “Set DNS servers allocated with DHCP requests” and select Custom Servers. Enter the following required information:
  • DNS Server 1:
  • DNS Server 2:
  1. Click Apply to save changes.
  2. Reboot all Poly phones.
  3. Check all devices on the network and confirm they are connected to the internet.  If a device is not connecting to the network, reboot the device.

NOTE: Some Windows computers may require running the following command from the Command Prompt to restore the ability to load certain websites: ipconfig /flushdns.

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