A really strange phone call, page 4
Pages: <<  1    2    3    4    5    6    7  >>
ATS Members have flagged this thread 8 times


reply posted on 16-7-2002 @ 11:45 PM by MajicEyes
My friend who is a member of the phreaking community gave me this site which, he thinks contains information about the number you traced the caller to. I'm still not sure who could use this to call you. The telephone company definitely has the ability to and maybe phone hackers do too. Now I'm not positive this is the explanation.

5.1 What are test numbers?

Test numbers are dialups to testing equipment or test features set up by the phone company or private entities. There are about a billion kinds of test numbers, so PLEASE don't just start asking for test numbers, especially on newsgroups like comp.dcom.telecom.tech.



5.2 What are some common test numbers and their uses?

- 5.2.1 Sweep Tones: Tone sweeps are a test tone ranging from 304hz to 3204hz. A common use for sweep tones is to check for infinity-transmitter style taps. Dial up a sweep tone. If an audible clicking is heard during the sweep then a transmitter could be installed on your line. Telco maintenance uses sweep tones to check for the presence of loading coils, and other such nasties that eat high frequency tones in order to qualify a line for high speed services.

- 5.2.2 Milliwatt test: These are 1004 hz tones sent out at 0 db. Milliwatt tests are used to check for line loss and other complex tests.

- 5.2.3 1004 hz test tone: This is a vanilla 1004 hz tone. Nothing too useful here, without a loop analyzer anyway.

- 5.2.4 Quiet termination: This feature connects the caller to a port with fixed resistance, 600 ohms or 900 ohms being the most common. There should be nothing but dead silence on connection. Clicks, static or crosstalk will be clearly evident if a noisy line is used to dial this test.

- 5.2.5 Ringback: Calls back the originating number in an annoying fashion. Dialing all the touch-tone digits in order (starting with 1 and ending in # going across the keypad rows) will generate 2 tones saying the keypad is ok.

- 5.2.6 Loops: These numbers exist in linked pairs. Call one number and youíll get a tone. Call the other number and you get dead silence. If both are called at the same time they make a connection. It used to be that you could then talk over this connection, but now there are filters that block speech placed on most loops.

- 5.2.7 ANAC: This test dialup will read off the number of the line youíre calling from. On rare occasions you will find ANACs with a DTMF response for use with remote test terminals.

- 5.2.8 DATUs: DATUs (Digital Audio Test Units) are a godsend to technicians and phone phreaks everywhere. DATUs allow a caller to monitor lines (don't get too excited), open and short pairs, and put trace tones on the pair. While it might not sound too exciting, it has more applications than most people think.
Pages: <<  1    2    3    4    5    6    7  >>    ^^TOP^^



Did Carl Sagan know something?
  Posted 16 days ago with 276 member flags
Earthly coincidences...or not.
  Posted 12 days ago with 122 member flags
STOP....Take a STEP BACK....and look at the BIG PICTURE!!
  Posted 18 days ago with 115 member flags
Was this the real reason why Megaupload was closed down?
  Posted 17 days ago with 96 member flags
The Mysterious Death of Marilyn Monroe
  Posted 15 days ago with 85 member flags

Newest topics getting replies, in real-time:

Alien Grey caught in photo ?
  Aliens and UFOs, Posted 7 hours ago, 57 replies
Pass Me My Rifle
  World War Three, Posted 12 hours ago, 54 replies
Santorum wants more fracking!!!
  US Political Madness, Posted 16 hours ago, 53 replies