Question

A transceiver was recently damaged by a lightning strike during a storm. How might you decide whether the ISP is responsible for replacing this device, or whether your company must foot the bill?

Answer 1

Answer:

Look at whether the device is located on the ISP's side of the demarcation.

Explanation:

In telecommunications networks, the demarcation point (often abbreviated to DEMARC and otherwise known as boundary point or network boundary point) is the physical point at which the public switched telephone network ends and the private network of the customer begins. In most cases it is where the cabling physically enters the building.

Understanding the location of your demarcation point means that in the case of a fault in your service, you can guide a technician to investigate.

If you experience a fault in your telecommunications network and you are in an office building, the chances that the fault is within the internal wiring is much higher.  

The service providers responsibility ends at the demarcation point, so whether it is an office or home network, if you find the fault within the B side (customer premises) then it is up to you to organise repairs.