-
[ Pobierz całość w formacie PDF ]
series of frauds by people posing as phone company employees. A Pacific Bell spokesman says customers in the 213, 805 and 916 area
codes are being victimized by someone who says he is a telephone company employee investigating calling card fraud. The individual calls
people at home at odd hours, asking for their calling card numbers. He then sells the numbers to people who use the numbers to make long
distance phone calls.
As recently as Monday of this week, 180 long distance calls were billed to a Sacramento area resident who had given his number to the thief
just three hours earlier. According to Pacific Bell, this kind of scheme and other forms of calling card fraud cost telephone customers
nationwide half a billion dollars a year. The company offered these tips to consumers to avoid becoming a victim
of calling card fraud:
Never give your calling card number or personal identification number to anyone. Any telephone company employee with a legitimate need to
know the number has access to it. Treat your calling card like any other credit card. Report its loss immediately by calling the 800 number on
the back of the card 800-621-0430. If you receive a suspicious call regarding your telephone calling card, report it by calling the 800 number
on the back of the card. If you receive a call from someone claiming to be a telephone company employee and asking for your calling card
number, ask for a name and number to call back. Then call the local Pacific Bell business office to report the incident.
One suspect was arrested in Southern California last week by a quick thinking customer who did just that. Pacific Bell immediately contacted
the local police department. A suspect holding seven stolen calling card numbers was arrested minutes later. Pacific Bell and long-distance
telephone companies will credit customers for calling card charges determined to be fraudulent. Pacific Bell is a subsidiary of Pacific Telesis
Group, a diversified telecommunications corporation based in San Francisco.
93. The Phreaker's Guide to Loop Lines by The Jolly Roger
A loop is a wondrous device which the telephone company created as test numbers for telephone repairmen when testing equipment. By
matching the tone of the equipment with the tone of the loop, repairmen can adjust and test the settings of their telephone equipment. A loop,
basically, consists of two different telephone numbers. Let's use A and B as an example. Normally if you call A, you will hear a loud tone (this
is a 1004 hz tone), and if you call B, the line will connect, and will be followed by silence.
This is the format of a loop line. Now, if somebody calls A and someone else calls B--Viola!--A and B loop together, and one connection is
made. Ma Bell did this so repairmen can communicate with each other without having to call their own repair office. They can also use them to
exchange programs, like for ANA or Ringback. Also, many CO's have a "Loop Assignment Center". If anyone has any information on these
centers please tell me. Anyway, that is how a loop is constructed. From this information, anyone can find an actual loop line. Going back to the
A and B example, Note: the tone side and the silent side can be either A or B. Don't be fooled if the phone company decides to scramble them
around to be cute. As you now know, loops come in pairs of numbers. Usually, ri
ght after each other.
For example: 817-972-1890
and
817-972-1891
Or, to save space, one loop line can be written as 817-972-1890/1. This is not always true. Sometimes, the pattern is in the tens or hundreds,
and, occasionally, the numbers are random. In cities, usually the phone company has set aside a phone number suffix that loops will be used
for. Many different prefixes will correspond with that one suffix. In Arlington, Texas, a popular suffix for loops is 1893 and 1894, and a lot of
prefixes match with them to make the number.
For Example: 817-460-1893/4
817-461-1893/4
817-465-1893/4
817-467-1893/4
817-469-1893/4
...are all loops...
or a shorter way to write this is:
817-xxx-1893/4
xxx= 460, 461, 465, 467, 469
Note: You can mix -and-match a popular suffix with other prefixes in a city, and almost always find other loops or test numbers.
Note: For Houston, the loop suffixes are 1499 and 1799. And for Detroit it's 9996 and 9997. When there are a large number of loops with the
same prefix format, chances are that many loops will be inter-locked. Using the above example of Arlington loops again, (I will write the
prefixes to save space) 460,
461, and 469 are interlocked loops. This means that only one side can be used at
a given time. This is because they are all on the same circuit. To clarify, if 817-461-1893 is called, 817-460 and 469-1893 cannot be called
because that circuit i
s being used. Essentially, interlocked loops are all the same line, but there are a variety of telephone numbers to access
the line.
Also, if the operator is asked to break in on a busy loop line he/she will say that the circuit is overloaded, or something along those lines. This
is because Ma Bell has taken the checking equipment off the line. However, there are still many rarely used loops which can be verified and
can have emergency calls taken on them. As you have found out, loops come in many types. Another type of loop is a filtered loop. These are [ Pobierz całość w formacie PDF ] - zanotowane.pl
- doc.pisz.pl
- pdf.pisz.pl
- matkadziecka.xlx.pl