Understanding the Demarc Extension - A Facility's Most Critical Cabling Channel

http://www.demarcextension.com - Demarc Extension Nationwide - Every telecom circuit requires a demarc extension, as mandated by federal regulations. This video explores the history of the demarc extension as well as its definition. Demarc Extension Nationwide is commited to the education of this critical piece of cabling.

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Understanding the Demarc Extension –
A Facility’s Most Critical Cabling Channel

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What You Will Learn
What is a Demarc Extension?
The History of the Demarc Extension
The Importance of a Demarc
Extension on Business Operations
Issues Businesses Face with an
Unreliable Demarc Extension
Installed

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•eCPE
The initial piece of CPE (Customer Premises Equipment)
that is located at the separation point between the
demarc extension and the end user’s internal network.
The ‘e’ denotes the exact location of this equipment, at
the edge of the end user’s circuit and avoids reference
complications when other CPE is used in a demarc
extension and/or at a facility.
•This equipment is typically a CSU/DSU, Router or
Modem.
eCPE Installation Completes
the Demarc Extension

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What is a Demarc Extension?
The transmission path:
originating from the interface of the access provider's side of a
telecommunications circuit Demarcation Point within a premise and
ending at the termination point prior to the interface of the edge
Customer Premises Equipment.
This may include in-segment equipment, media converters and patch
cords as required to complete the circuit's transmission path to the edge
CPE.

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What is it called again?
•Demarc Extension
•Extended Demark
•D-marc Extension
Dmark Extended
Circuit Extension
Telecom/Telcom
Extension

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Who is Involved?
End User/Subscriber
Carrier
Local Access Provider
Master Agent, Sub-Agent
Solution Provider
Demarc Extension Contractor

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Industry Confusion:
Timeline

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•Part 68 came into effect in 1975, however it was the
1984 Deregulation of the Bell companies that
established the demarcation point.
•Caused loss of standardization that was maintained by
the local access providers prior to deregulations.
•Created confusion over responsibility for the demarc
extension.
Industry Confusion:
Timeline 1984

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•FCC amended the definition of the demarcation
point to ensure it would be near the point where the
cabling entered the customer’s premises
•Enactment of the 12 inch rule which states:
The demarcation point may be located within 12
inches of the point at which the wiring enters the
customer’s premises.
•Still allowed local access providers reasonable and
nondiscriminatory standard operating practices for
the location of the demarcation point.
Industry Confusion:
Timeline 1990

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•FCC clarified the wording of the 12 inch rule by adding
the following: "or as near thereto as practicable."
•Minimized the location issues for the demarcation
point within the premises.
Industry Confusion:
Timeline 1997

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Additional Resources
Demarc Extension Nationwide
– www.demarcextension.com
– [email protected]
– 800.341.9722
White Paper
The Demarc Extension and its
Critical Role in Enterprise Network
Telecommunications Infrastructure
• Video Library
– Visit www.demarcextension.com
– Under the Resources tab, select Video Library