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While there are many other databases within the LMOS system which serve a
variety of functions, the bases listed above are the major ones.
The telephone network is divided into two major pieces, the loop portion,
or the line from a Central Office to the customer premises; and the Toll
portion. This is the network that connects long distance offices such as the
Toll center and Primary center, and is also known as the Direct Distance
Dialing or DDD network. The LMOS database is customer and loop oriented. The
loop portion of the network is frequently altered and changed, as it is the
customer's link with the DDD network. These changes are tracked by LMOS. This
type of activity falls into two categories: Customer initiated service
requests (when a customer makes a request or trouble report), and Bell
Operating Company initiated plant changes.
'Plant' is the Outside Plant of cable which makes up the local loop. A
Customer initiated service request is for installation of new lines for the
customer. The Universal Service Order or USO is the record of all these types
of requests. USO's contain information such as customer listing, billing
section, service and equipment section, and the Assignment section, which
identifies the Central Office and outside plant (cable) facilities or lines.
A BOC initiated plant change is called a work or job order. This is when
the BOC serving the area make additions and rearrangements to loops to meet
customer requirements for service. Examples of work orders include the
following:
Cable Throw-This order is when a cable pair is added to assist an
existing cable in a high-growth area. This involves a change to the customer's
cable and pair number. Cable Throw Summaries are printouts from this type of
work order.
Area Transfer-This order is used when Wire Centers, or the point where
customer cable pairs branch out from, have to be balanced to compensate for
growth, as there will be a need for more subscriber loops. This often involves
the change of a customer's number.
Service Orders pass through a BOC interface program to add RSB
identifiers, which are repair unit numbers, needed by LMOS to translate data
to a USO format.
The Automatic Line Record Update (ALRU) system is a system that updates
the data bases of LMOS in response to a service order.
Work Orders can either involve a bulk task such as a large cable throw of
400 pairs from cable 102 to cable 109, which would use a special bulk-oriented
program in the Work Order process, or smaller tasks concerning a few cables,
which would use the Enter Cable Change or ECC transaction.
Below is a summary of the Service Order flow through LMOS.
1: The customer requests new or changed telephone service for their line.
2: The request is entered into the BOC's service order network to be 'worked'.
3: A request is made to assign facilities necessary to install or modify the
customer service.
4: Facilities are assigned and information is sent to the service order
network.
5: The service order network forwards information to do work to the installer,
or the RSB person who does the actual repair or modification on the line.
6: Installer completes work, returns notice to service order distribution
network that service order has been completed.
7: Completed service order goes to the BOC interface program to perform data
transactions for standard ALRU input.
8: A day's worth of service orders are accumulated and read into the ALRU.
9: Automatic Line Record Update automatically updates the LMOS host database.
Next is a summary of the Work Order flow (for BOC initialized plant changes).
1: The Distribution Service Design Center forwards requests for loop facility
additions or rearrangements to the Construction Maintenance Center to be
worked.
2: If the request for work involves existing facilities (ones that are already
there), facility assignment information is requested.
3: Facilities assigned to the Work Order are forwarded to the Construction
Maintenance Center.
4: The Construction craft (installers) receives the work instructions.
5: Work is completed and notices are sent to the CMC.
6: A paper record of the completed work order is distributed to LMOS.
When service order and work order activities are combined, an estimated
20 megabytes of data in the LMOS host data base is modified in some way every
working day.
Part II-MLT