Customer-premises equipment

From Wikipedia, the free encyclopedia

(Redirected from Customer premises equipment)

Customer-premises equipment or customer-provided equipment (CPE) is any terminal and associated equipment located at a subscriber's premises and connected with a carrier's telecommunication channel(s) at the demarcation point ("demarc"). The demarc is a point established in a building or complex to separate customer equipment from telephone company equipment.

CPE generally refers to telephones, DSL modems or cable modems, or purchased set-top boxes for use with Communications Service Providers' services. Also included are key telephone systems and most private branch exchanges. Excluded from CPE are overvoltage protection equipment and pay telephones.

[edit] History

The two phrases, "customer-premises equipment" and "customer-provided equipment", reflect the history of this equipment.

Under the Bell System monopoly (post Communications Act of 1934), the Bell System owned the phones, and one could not attach one's own devices to the network, or even attach anything to the phones (a popular saying was "Ma Bell has you by the calls"). Thus phones were property of the Bell System, located on customers' premises – hence, customer-premises equipment.

With the gradual breakup of the Bell monopoly, starting with Hush-A-Phone v. United States [1956], which allowed some non-Bell owned equipment to be connected to the network (a process called interconnection), equipment on customers' premises became increasingly owned by customers, not the telco. Indeed, one eventually became able to purchase one's own phone – hence, customer-provided equipment.

[edit] Broadband

A Subscriber Unit, or SU is a broadband radio that is installed at a business or residential location to connect to an Access Point to send/receive high speed data wired or wirelessly. Devices commonly referred to as a Subscriber Unit include cable modems, mobile phones, etc.

[edit] Other uses

Cellular carriers may sometimes internally refer to cellular phones a customer has purchased without a subsidy or from a third party as Customer Provided Equipment.
It is also notable that the fully qualified domain name of DSL and cable lines connected to a residence will often contain 'cpe'.