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Dataset card Data Studio Files
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1.99k
ISDN will offer users 144 Kbs or more which can be allocated among various
communications tasks--data, voice, or video--in whatever proportion is
necessary. This means that the available bandwidth could support simultaneous
audio and video communication.
______________________________________________________________________________
References:
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"Electronic Meetings: Substitutes With Substance?," by Sam Dickey, Today's
Office, July 1986.
"Getting The Full Picture On Corporate Videoconferencing," by Marita Thomas,
Facilities Design & Management, June 1986.
"The Lid Is Off ISDN," Tomorrow's Communication Connection, April 1986.
"Videoconferencing; An Alternative Solution," Corporate Informations Systems,
General Electric (GE).
______________________________________________________________________________
Onto the next generation... --KL
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==Phrack Inc.==
Volume One, Issue Nine, Phile #9 of 10
Loop Maintenance Operations System
Written by Phantom Phreaker and Doom Prophet
Part I: A basic overview of LMOS
Part II:Mechanized Loop Testing
Loop Maintenance and Operations System (LMOS) is a telephone company
database that is a vital part in the act of repairing local loops (a customers
telephone line). When you call the Repair Service to have your telephone
service repaired, the information you give, as well as information and history
on your local loop is processed through the LMOS database. This file shall
examine several of the parts of LMOS, which is used by a number of different
bureaus. The bureau that you reach when you dial your repair service is called
the Centralized Repair Service Answering Bureau (CRSAB), and is usually
reached by dialing (1)+611 or sometimes a POTS (Plain Old Telephone Service)
number in areas where the X11 services aren't available. A CRSAB attendant is
who you will deal with when reporting line trouble. You will tell the
attendant the line number, and the types of problems you are experiencing on
that line. The attendant will file a report concerning the basic information
vital to line repair. Something called 'Front End Processors' form a
'real-time' interface between the customer reporting the trouble, and the
CRSAB attendant. 'Real-Time ' means that it is done on a continually changing
basis, (ex. while the customer is reporting the trouble to an attendant,
action is being taken.)
When a customer makes a trouble report to the CRSAB, the report is filed
and sent through the Cross Front End, which is a link from the CRSAB to the
LMOS system network. The trouble report is sent along a data link to the Front
End, where a BOR (Basic Output Report) is requested. BOR's include line record
information such as past trouble history and numerical values of MLT system
tests. MLT is Mechanized Loop Testing. As LMOS is responsible for trouble
reports, past trouble analysis, and other data related functions, MLT, which
is connected to LMOS through a minicomputer in the Repair Service Bureau known
as the MLT Controller, does the actual testing of subscriber loops. MLT
hardware is located in the Repair Service Bureau. This hardware is linked to
the LMOS system by way of an LMOS minicomputer, which may be in a remote
location or with the LMOS central processor. Test trunks connect MLT hardware
to the Wire Centers, which in turn connect with the subscriber loops.
The Databases of LMOS are connected via a high speed data link. The major
divisions of data handled by LMOS are listed below.
Past Trouble History- This information is contained within the
Abbreviated Trouble History (ATH) database and holds the most recent 40 days
of history.
The Trouble History (TH) database contains histories of troubles for the
day. This TH database is used to support TREAT (Trouble Report Evaluation and
Analysis Tool) reports.
Line Record- These bases contain info about the customer's telephone
circuit, whether it is POTS (for which there is a separate database), or SS
(Special Service). Special Services numbers can be up to 16 characters plus
the NPA or area code. The LMOS definition of an SS is any circuit having an
identifier that is other than 10 digit numeric with NPA.
Also, the Cable (CA), Associated Number (AN), Telephone Answering service
(TAS), and Central Office Equipment (COE) data bases contain line record
information as well.
Miniline Record- There is one Miniline Record database for each Front End
transaction processor. An example explaining this would be: A customer makes a
trouble report to the CRSAB. The data sent through the Cross Front end to the
Front End database, where a BOR is requested, is recorded and applied as
status by the Miniline Record database to the Front End base. This helps to
keep the LMOS Master Database in conjunction with the Front End bases.
Service Order History- This base contains a list of all lines changed
during the day. The list is used for construction of Miniline Records to be
sent to the front ends.