Motion Computing FWS-DS1 Bedienungsanleitung Seite 92

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Seitenansicht 91
GTE
-
Florida
Unbundled Network Element
m)
Non-Recurring Cost Study
-
Costs
of
LOOD
Conditioninp
This section of the NRC Study addresses the costs of Loop Conditioning. Loop
Conditioning is the removal of load coils andor bridged tap' from the local cable pairs.
Load coils and bridged tap impede the transmission of digital signals. If the CLEC
requires clean copper pairs for the digital service it offers its customers, then the CLEC
has the option of ordering Loop Conditioning from GTE.
Removing a load coil and/or bridged tap from a cable pair requires coordination of
several GTE work groups to ensure that cable pairs for other end user customers are not
affected.
The method used to develop the time and cost factors associated with deloading and
removing bridged tap from cable pairs for use with
high
frequency equipment was
completed by the Outside Plant Construction and Outside Plant Engineer support groups.
Subject Matter Experts (SME) in conjunction with field managers developed the
activities and times to accomplish these activities. The SME's are located in Irving,
Texas and are the support group for all field forces. The SME's consulted with the field
forces to verify the time and activities were valid.
This
information was collected and
prepared in April
2000.
Load
Coil
Removal
Load coils are an integral part
of
the copper, voice grade communications network. Their
purpose is to provide for the proper operation of voice grade equipment
on
loops that
exceed normal accepted telecommunications voice grade circuit length. Load coils have
been
in
the network in the past and are still
used
today for those loops that exceed the
limits of the switching equipment.
Load coils are not needed in the provisioning of
high
frequency circuits. The opposite is
actually true in that the load coil inhibits the proper transmission of the high frequency
signals of the circuit.
In
order for these circuits to work correctly, a properly loaded cable
pair for voice grade service must be deloaded.
When the CLEC requests a conditioned loop for a customer and the cable pair is loaded,
a request is sent to the local engineering department to analyze the network and draft a
work order for the pair to be deloaded. The engineering group will create a work order
that will be sent to the outside plant construction forces outlining the work necessary to
P-.
'
A
long-time telephone company practice
has
been to provide for multiple appearances
of
the same cable
pair at many distribution
points
and branch feeder cables. These multiple appearances (which are not
in
the
direct current path between central office and end user customer) are called bridged tap. Bridged tap causes
swings
in
loss
versus frequency;
this
impairs digital transmission.
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