Question: What’s demarcation points anyway?

 

 

Answer: The term “demarcation points” (also called demarc), is the point within a facility, property or campus where a circuit provided by ISP or Telecom, terminates. Past this point, the customer must provide equipment or further vertical & horizontal cabling if needed. Maintenance and  equipment past demarcation points is the customers responsibly.

 

 

Below examples shows these terms how they usually look like in reality:

 

 

 

 

 

Figure 1: Demarcation point marking end of PSTN and start of PBX private network.

 

 

 

 

 

 

Figure  2: Demarcation points and various devices in end users shelf