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

Dennis Mazaris, RCDDPresident, Concert Technologies

Loss of Single Connection

Loss of Demarc Extension Connection

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.

Demarc Extension Timeline

Loss of Standardization

“Like most deregulation efforts, that of the CO-OSP also contains several drawbacks. One is the loss of the standardization that was maintained by the Service Providers (SPs) prior to deregulation. This problem has been and continues to be addressed…”

BICSI Customer-Owned Outside Plant Design Manual

Telecommunications Industry Association. (2009). Commercial Building Telecommunications Cabling Standard, ANSI/TIA-568-C.1-2009. Arlington, VA: TIA.

Commercial Building Telecommunications Cabling Standard

Who is Involved?End User/Subscriber

Carrier

Local Access Provider

Master Agent, Sub-Agent

Solution Provider

IP TechnologyWAN

Security

Life Safety

Video Conferencing

VOIP

Energy Controls

UnifiedCommunications

Cloud Computing

What the Customer Wants

Larger Pipes or More Circuits

Department Control

Redundancy

Easy Fault Isolation

Less Finger Pointing

Circuit Type Cable Type Distance

Limit SpeedHandOff

Connector Type

T12 Pair STP

4 Pair UTP*

655 Ft1.544 Mbps

Smart JackCX

RJ 48X or 8 pin mod plug

DS3 DS3 Dual COAX 440 Ft

44.763 Mbps(28 T-1)

BNCPanel

BNC or 440

OC3FiberSingle Mode

Unlimited for premise

155 Mbps(100 T-1)

FiberPanel

SC,LC,ST,FC

Labeling

Mechanically or Permanent MarkerLocal Access Provider’s ID#Carrier ID#CX, Interconnections, Intraconnections

Minimum Vendor Cable ID#Cross Over Cables

Problems to InstallAccess

Tag & Locate

Congested Pathways

Core Hole

Fire Stopped

Capacity

Testing of the Demarc Pre-Wire

T1 Pair Tester Field Tester with Store and Print

DS3 Coax Tester Field Tester with Store and Print

OC3 Light Source & Power Meter

Field Tester with Store and Print

Low Level High Level

High Level Circuit Testing

Training Cost

Low Level Testing

1 1 0 1 0 1 1

1 1 0 1 0 1 1 1 1 0 1 0 1 1

No Loop

Demarc

Local Loop

Local Loop

T1 Loopback PlugDS3

Patch Cable

OC3

Patch Cable

Warranty

Turnover of Circuit

30, 60, 90 Days

One Year

Must Confirm

SummaryMultiple Entities InvolvedEstablish a Set of Installation StandardsIP Technology Causing A Growth ofCircuitsLabeling - Carrier ID#, AP ID#Avoid Finger Pointing

Test at the Demarcation Point

Resources

Demarc Extension Nationwidewww.demarcextension.com

Dennis Mazaris, RCDDPresident, Concert Technologies dmazaris@concerttech.com