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Internet Support

How do I test if my DSL filter is working?

Your phone and Internet use the same line. DSL filters split the signal coming into your home so both your phone and Internet service can share that line. Incorrectly connected and/or damaged DSL filters can cause noise on your line.

Confirm that your DSL filters are properly connected. Every electronic device that’s connected to your DSL line – except your DSL modem – needs a filter. If you only have one wall jack and your phone and DSL modem need to plug into it together use a DSL Dual filter. This includes: cordless phones, satellite receivers, computers (modem or power strip), caller id boxes, fax machines, answering machines and alarm/security systems.

To test your DSL filter and check if you have a problem:

  1. Leave your corded telephone and your modem attached to the phone line.
  2. Disconnect all other devices from their phone jacks.
  3. One at a time, reattach each device and filter to its phone jack and check the phone for noise again after plugging in each device.
  4. If you find that the sound gets bad after reattaching a device, replace that filter.

What is a DSL filter?

When you have Internet and telephone service provided on the same line, you need to use filters. DSL filters separate the incoming signal, so you can be online and still use your phone, DVR and other devices.

When devices aren’t connected to a filter, or filters are installed incorrectly, you can experience:

  • Static or a hissing sound on your telephone line
  • Slow Internet speeds
  • Intermittent connection to the Internet
  • No connection to the Internet

Which devices do I need a DSL filter for?

Every device that connects to your phone line – except your modem – needs a DSL filter. For example:

  • Telephones, caller ID units, answering machines
  • Satellite TV receivers, cable boxes, DVRs, TiVos
  • Fax machines
  • Security systems
  • Automatic water meters

How to install a DSL filter.

You should have received 2 filters from Blackfoot along with your modem – one that is single port and one that is dual port.

Single Port DSL FilterDual Port DSL Filter

Filters are plugged in between your jack and your device. To install one, plug the filter into a wall jack, and then plug a phone cord or other device into the other end.


Single DSL Filter to Phone

If you only have one wall jack for the phone and the modem you can use the dual port filter provided to you with your modem. Make sure to plug the filter into the wall jack and the modem and phone into the filter.

Dual Port DSL Filter to Phone and Modem


Need additional filters? Please contact our Technical Support Team.

What if I have a wall mounted phone?

A wall mounted filter can be used for wall-mounted phones that a wall jack filter can’t fit behind. You can purchase these at any electronics store.

Wall Mounted Phone Jack

How do I connect devices to my WiFi?

Connecting Devices to Your Blackfoot WiFi

Note: You must have a wireless modem.

  1. Locate your wireless network on your PC or network device. The wireless network name will be “Blackfootxxxx” – where the xxxx is the last four digits of your LAN MAC address. The LAN MAC address can be found on the bottom of the modem.
  2. Enter your password. The wireless password is the Serial Number of the unit, which can also be found on the bottom of the modem. THIS IS CASE SENSITIVE. Depending on your operating system, you may have to enter this twice to confirm the connection.

My DSL light is flashing green. How do I fix this?

If the DSL light is green and flashing, then the modem isn’t detecting the Blackfoot network.

1. Inspect the phone cord that goes directly from the wall jack to the modem. Look for the following:

  • Look at the phone cord and make sure it is free of nicks, cuts or kinks. If you’re not sure, replace it with a new phone cord.
  • Make sure the phone cord is completely plugged into the wall jack and the modem. If you’re not sure, unplug the cord at both ends and plug it back in.
  • Is the phone cord plugged into the correct modem port? It should be plugged into the port labeled DSL.
  • Is the phone cord from the modem plugged into a filter? If so, remove it and plug the phone cord into the wall jack.
  • Is the phone cord plugged into a phone jack splitter? If so, remove it and plug the phone cord into the wall jack.
  • Is the phone cord plugged into a power strip or surge protector with phone jacks? If so, remove it and plug the phone cord into the wall jack.

2. If you have both our phone and Internet service, does your phone have dial tone?

  • No dial tone: Not having dial tone can impact your Internet service and indicate other problems. If you have no dial tone please follow these steps. (Hyperlink to No dial tone TS)
  • Dial tone: If you have dial tone but your DSL light isn’t lit up, we need to look elsewhere for the problem.


1. Try to “power cycle” the modem.

  • Unplug the power cord from the back of the modem.
  • Unplug all devices plugged into any and all phone jacks in the house (e.g., modem, telephones, answering machines, automatic water meter, fax machine, credit card machine and satellite receivers).
  • Reconnect the phone cord going directly from the wall phone jack to the modem jack labeled, DSL or LINE. Be sure there’s no DSL filter, phone jack splitter or power strip/surge protector with a phone jack built-in on this line.
  • Reconnect the power cord to the modem and allow the modem to go through its boot up / restart process.

2. If the DSL light is still blinking, there could be a problem with the phone cord or wall jack.

  • Try using a different cord and /or a different jack. (Note: It might seem obvious but things happen so it’s good to check… If a technician has recently been at your home, make sure you’re plugging the modem into the jack the tech recommended.)

If you have tried these steps and the DSL light won’t stay solid green, contact Blackfoot’s technical support for help.

Why isn’t the DSL light on my modem solid green?

When you first power on your modem, the DSL light will initially blink slowly as it connects to Blackfoot’s network, gets faster as it logs in and then turns solid green when it is connected.

When your modem is working correctly, the DSL light is solid green.

What is my local dial up number?

The local number for your Blackfoot dial up service is 541-1550. If you live in Avon, the local number for your dial up is 492-4700.

How do I test my Internet speed?

Find out what download and upload speed your connection is right now, plus test latency and jitter at: speedtest.blackfoot.com.

How do I determine what modem I need?

Blackfoot currently provides a single port Ethernet modem and a 4 port wireless modem. If you have a network, please contact Blackfoot or your network equipment vendor for additional information. The following are the modem specifications required should you decide to use a DSL modem not recommended by Blackfoot: ADSL / ADSL 2+ compatible. Encapsulation is PPPoE / LLC-SNAP , Must be able to adjust the VCI/VPI settings (VPI = 0, VCI = 100). Dynamic IP addressing. Primary DNS: Secondary DNS: Blackfoot.net Username and Password

Specifications & Settings for Blackfoot Modems and Routers

Blackfoot DSL Modem/Router Specifications: PPPoE (over Ethernet) ADSL compatible; Must be able to adjust the VCI/VPI settings (VPI = 0, VCI = 100); Multiplexing is – LLC Based for PPPoE. Dynamic IP addressing Primary DNS: Secondary DNS: Blackfoot.net Username and Password.

Qwest/Centurylink cutomers that use us for ISP will still use PPPoA with VPI=0 VCI=32 with VC Mux to work with the Clink circuit.

Blackfoot’s Domain Registration Information

Domain Name: yourdomainname.com
Administrative Contact: Your own info
Registrar Name for domain transfers: icsdomains
Billing Contact: Your own info
Domain servers:
Primary Server Hostname: NS1.BLACKFOOTDNS.NET
Primary Server Netaddress:
Secondary Server Hostname: NS2.BLACKFOOTDNS.NET
Secondary Server Netaddress:

How do I install my Blackfoot modem?

Blackfoot Modem Installation Instructions

  1. Make sure both the modem and computer are connected and on.
  2. Open your web browser on your computer.
  3. In the address bar of your browser, erase the address of your default home page, and type in and press enter on your keyboard.
  4. There will be prompt for a Username and Password. Type in “root” for the username and “bfdslmodem” for the password. This will log you into the modem interface.
  5. At the top of the screen, click the Basic Setup button. On the left side of the screen, click WAN Setup.
  6. On the next screen, proceed to Step 2: Wide Area Nework (WAN) Service Setup and click the Edit button on the right side of the box.
  7. Enter your DSL username and password found on the enclosed Blackfoot DSL/Sharelink Order Form, under important information. Click Next at the bottom of the screen.
  8. Click Apply/Save on the screen and close your browser.
  9. Check the lights on the modem. If you have a green Internet light, you should be able to open a new browser window and get online. If the modem has a red Internet light, that typically means the username or password was typed incorrectly. If this is the case, repeat the steps above and re-enter your username and password.