These electrical signals can be "read" by your telephone, television, and computer. Information that is sent from your location will be converted from electrical signals to light pulses in the Fiber Optic Gateway.

Unlike traditional self-powered telephone & cable television service, your US Sonet Fiber Optic Service depends on your home's power source. The Fiber Optic Gateway has a power cord that goes into home or office & connects to a Battery Back-up Unit where it plugs into an existing standard AC outlet.

To ensure connectivity to the US Sonet Fiber Optic Network, please make sure your Battery Back-up Unit is plugged in at all times.

In the event of a commercial power failure- your battery back-up unit will provide you with power for voice service for up to 8 hours of talk time. Video and data service do not function in the event of a commercial power failure.

Your BBU has light indicators to signify conditions as described below:

If you follow the trouble shooting tips and still do not have voice service you may test to see it the problem lies inside your wiring. Take a corded telephone and a slotted screwdriver to your gateway. Open the gateway (using the slotted srewdriver) and unplug the line from the jack corresponding to the line in question. Plug your telephone into that phone jack and listen for a dial-tone. (If you have only one phone line, plug your phone into jack #1.)

If you do not hear a dial tone while the gateway, you will need to contact US Sonet. Our technicians may ask to describe the indicator lights inside the gateway in order to help diagnose the problem. See the illustration below for an explanation of the indicator lights.

US Sonet owns and maintains the fiber optic cable up to your Fiber Optic Gateway. However, other cable located between the Gateway and any equipment is customer-owned and is not maintained by US Sonet. For example, the cable that supplies your internet connection, if you have this service, may have been installed by US Sonet, but is now customer-owned.

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Troubeshooting Tips

If you experience problems with your telephone, television, or Internet service, the following checklist could save you a call to US Sonet Tech Support. It also help us get to the root of the problem faster if you need to call.

 Do you have power:

� Check to see if you are experiencing a power outage.

� Check that your BBU's power cord is plugged into an AC outlet.

�  If the outlet is a Groud Fault Circuit Interrupted (GFCI), check to make sure it has not been     tripped. If it has press the reset.

�  Check the fuse or circuit breaker to make sure your outlet is working. Reset the breaker or     replace the fuse if necessary.

Is the battery functioning:

�  If the Battery Indicator is red, check your battery connection inside the BBU.

�  If it is properly connected by the light is still red, the battery may need to be replaced. Please     call US Sonet for service.