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White Paper
ADSL Service Delivery
January 21, 2003
A comprehensive look at the challenges of rapidly delivering
ADSL services, keeping up with the subscriber demand, and
controlling operating expenses.
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Preface
This white paper analyzes several methods of connecting a Digital Subscriber Line Access
Multiplexer (DSLAM; and splitter) to the outside plant. Analyzed methods include dedicated pair
count, protected jumper, wire-wrap management cabinet and the KRONE Asymmetric Digital
Subscriber Line (ADSL) delivery solution. The analysis primarily focuses on remote equipment
deployments serving lines provisioned on pair-gain or Digital Loop Carrier (DLC) systems.
General
ADSL has emerged as the broadband access technology of choice for most telephony providers
throughout the world. While the initial deployment of DSLAMs rushed to keep pace with
burgeoning customer demand, current conditions require greater consideration of regulatory and
economic factors. Increased scrutiny mandates no less than optimal deployment of capital
spending.
In contrast to dial-tone, DSL is not ubiquitously available. While the location of DSLAM
deployment is critical, the efficiency of the equipment’s interface with the outside plant is
paramount. Slight idiosyncrasies in this interface can result in substantial service interruptions

capacity is needed in the network. In the past, operating companies would have to place more
feeder cable to increase capacity. Now, remote terminals increase capacity quickly. The diagram
below shows the basic remote terminal and will be the basis of discussion for each of the ADSL
deployment methods.
Remote Terminal
Pairgain System
Cross box
(Feeder)
(Distribution)
Pedistal
Telephone
NID
Drop
Fiber feed to CO
Existing Remote Terminal
Typical Remote Terminal
Digital Loop Carrier System
Cross Box
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This document may not be reproduced in whole or in part without written permission. © 2003 KRONE, Inc.
Methods of ADSL delivery
The following diagram will be used to illustrate several methods of ADSL delivery.
Remote Terminal
Pairgain System
Cross box
(Feeder)
(Distribution)

the ADSL input binding post. The dial-tone is routed into the DSL solution and then back from the
DSLAM to the cable pair with the voice and data combined.
To disconnect service, the technician must remove the two jumpers that are running to the
DSLAM input/output binding post and run a new jumper between the feeder pair and the
distribution pair. The customer’s service is dropped during this disconnect and re-wire
period.
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This document may not be reproduced in whole or in part without written permission. © 2003 KRONE, Inc.
Connecting a DSLAM to the Outside Plant:
Protected Jumper Method
Description
With this approach, a protection field within the remote terminal is used to gain access to the dial-
tone and re-route into the DSLAM. A custom protector unit is equipped with a 2-pair jumper wire
that exits the rear of the protector module. Inside the RT cabinet a connecting block is added for
the inputs to the DSLAM splitter and the combined outputs. Typically, this is a wire-wrap block
and is cabled to the DSLAM solution. (See items 2 on above diagram)
Service Delivery
To activate service, the technician unplugs the protector module on the selected cable pair. The
customer’s service is dropped during this re-wiring process. The protector with the 2-pair
jumper is inserted into the protector field. The jumper is then routed inside the cabinet to the
ADSL interface terminal block. The technician strips and wire-wraps the ends of the jumper to the
respective voice input and combined output. The completed process activates ADSL service for
the customer.
To disconnect service, the technician removes the protected jumper coil from the protector field
and inserts a standard protector. The customer’s service is dropped during this process.
Connecting a DSLAM to the Outside Plant:
Wire Management Cabinet with Wire-wrap Interface Method