Before you run out and order a WAN service type from a provider, it would be a really good idea to understand the following terms that service providers typically use:
Customer premises equipment (CPE)Customer premises equipment (CPE) is equipment that’s owned by the subscriber and located on the subscriber’s premises.
Demarcation point The demarcation point is the precise spot where the service provider’s responsibility ends and the CPE begins. It’s generally a device in a telecommunications closet owned and installed by the telecommunications company (telco). It’s your responsibility to cable (extended demarc) from this box to the CPE, which is usually a connection to a CSU/DSU or ISDN interface.
Local loop The local loop connects the demarc to the closest switching office, which is called a central office.
Central office (CO) This point connects the customer’s network to the provider’s switching network. Good to know is that a central office (CO) is sometimes referred to as a point of presence (POP).
Toll network The toll network is a trunk line inside a WAN provider’s network. This network is a collection of switches and facilities owned by the ISP. Definitely familiarize yourself with these terms because they’re crucial to understanding WAN technologies.
Customer premises equipment (CPE)Customer premises equipment (CPE) is equipment that’s owned by the subscriber and located on the subscriber’s premises.
Demarcation point The demarcation point is the precise spot where the service provider’s responsibility ends and the CPE begins. It’s generally a device in a telecommunications closet owned and installed by the telecommunications company (telco). It’s your responsibility to cable (extended demarc) from this box to the CPE, which is usually a connection to a CSU/DSU or ISDN interface.
Local loop The local loop connects the demarc to the closest switching office, which is called a central office.
Central office (CO) This point connects the customer’s network to the provider’s switching network. Good to know is that a central office (CO) is sometimes referred to as a point of presence (POP).
Toll network The toll network is a trunk line inside a WAN provider’s network. This network is a collection of switches and facilities owned by the ISP. Definitely familiarize yourself with these terms because they’re crucial to understanding WAN technologies.
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