An ANAC (Automatic Number Announcement Circuit) number is a telephone
number that plays back the number of the telephone that called it.
ANAC numbers are convenient if you want to know the telephone number
of a pair of wires.
11. What is the ANAC number for my area?
How to find your ANAC number:
Look up your NPA (Area Code) and try the number listed for it. If that
fails, try 1 plus the number listed for it. If that fails, try the
common numbers like 311, 958 and 200-222-2222. If you find the ANAC
number for your area, please let us know.
Note that many times the ANAC number will vary for different switches
in the same city. The geographic naming on the list is NOT intended
to be an accurate reference for coverage patterns, it is for
convenience only.
Many companies operate 800 number services which will read back to you
the number from which you are calling. Many of these require
navigating a series of menus to get the phone number you are looking
for.
(800)238-4959 A voice mail system
(800)328-2630 A phone sex line
(800)568-3197 Info Access Telephone Company's Automated Blocking Line
(800)571-8859 A phone sex line
(800)692-6447 (800)MY-ANI-IS
(800)769-3766 Duke Power Company Automated Outage System
(800)455-3256 Unknown
An non-800 ANAC that works nationwide is 404-988-9664. The one catch
with this number is that it must be dialed with the AT&T Carrier
Access Code 10732.
Another non-800 nationwide ANAC is Glen Robert of Full Disclosure
Magazine's number, 10555-1-708-356-9646.
Please use local ANAC numbers if you can, as abuse or overuse kills
800 ANAC numbers.
NPA ANAC number Geographic area
--- --------------- ---------------------------------------------
201 958 Hackensack/Jersey City/Newark/Paterson, NJ
202 811 District of Columbia
203 970 CT
205 300-222-2222 Birmingham, AL
205 300-555-5555 Many small towns in AL
205 300-648-1111 Dora, AL
205 300-765-4321 Bessemer, AL
205 300-798-1111 Forestdale, AL
205 300-833-3333 Birmingham
205 557-2311 Birmingham, AL
205 811 Pell City/Cropwell/Lincoln, AL
205 841-1111 Tarrant, AL
205 908-222-2222 Birmingham, AL
206 411 WA (Not US West)
207 958 ME
209 830-2121 Stockton, CA
209 211-9779 Stockton, CA
212 958 Manhattan, NY
213 114 Los Angeles, CA (GTE)
213 1223 Los Angeles, CA (Some 1AESS switches)
213 211-2345 Los Angeles, CA (English response)
213 211-2346 Los Angeles, CA (DTMF response)
213 760-2??? Los Angeles, CA (DMS switches)
213 61056 Los Angeles, CA
214 570 Dallas, TX
214 790 Dallas, TX (GTE)
214 970-222-2222 Dallas, TX
214 970-611-1111 Dallas, TX (Southwestern Bell)
215 410-xxxx Philadelphia, PA
215 511 Philadelphia, PA
215 958 Philadelphia, PA
216 331 Akron/Canton/Cleveland/Lorain/Youngstown, OH
217 200-xxx-xxxx Champaign-Urbana/Springfield, IL
219 550 Gary/Hammond/Michigan City/Southbend, IN
219 559 Gary/Hammond/Michigan City/Southbend, IN
301 958-9968 Hagerstown/Rockville, MD
310 114 Long Beach, CA (On many GTE switches)
310 1223 Long Beach, CA (Some 1AESS switches)
310 211-2345 Long Beach, CA (English response)
310 211-2346 Long Beach, CA (DTMF response)
312 200 Chicago, IL
312 290 Chicago, IL
312 1-200-8825 Chicago, IL (Last four change rapidly)
312 1-200-555-1212 Chicago, IL
313 200-200-2002 Ann Arbor/Dearborn/Detroit, MI
313 200-222-2222 Ann Arbor/Dearborn/Detroit, MI
313 200-xxx-xxxx Ann Arbor/Dearborn/Detroit, MI
313 200200200200200 Ann Arbor/Dearborn/Detroit, MI
314 410-xxxx# Columbia/Jefferson City/St.Louis, MO
315 953 Syracuse/Utica, NY
315 958 Syracuse/Utica, NY
315 998 Syracuse/Utica, NY
317 310-222-2222 Indianapolis/Kokomo, IN
317 559-222-2222 Indianapolis/Kokomo, IN
317 743-1218 Indianapolis/Kokomo, IN
401 200-200-4444 RI
401 222-2222 RI
402 311 Lincoln, NE
404 311 Atlanta, GA
404 940-xxx-xxxx Atlanta, GA
404 990 Atlanta, GA
405 890-7777777 Enid/Oklahoma City, OK
405 897 Enid/Oklahoma City, OK
407 200-222-2222 Orlando/West Palm Beach, FL
408 300-xxx-xxxx San Jose, CA
408 760 San Jose, CA
408 940 San Jose, CA
409 951 Beaumont/Galveston, TX
409 970-xxxx Beaumont/Galveston, TX
410 200-6969 A
410 200-555-1212 A
410 811 Annapolis/Baltimore, MD
412 711-6633 Pittsburgh, PA
412 711-4411 Pittsburgh, PA
412 999-xxxx Pittsburgh, PA
413 958 Pittsfield/Springfield, MA
413 200-555-5555 Pittsfield/Springfield, MA
414 330-2234 Fond du Lac/Green Bay/Milwaukee/Racine, WI
415 200-555-1212 San Francisco, CA
415 211-2111 San Francisco, CA
415 2222 San Francisco, CA
415 640 San Francisco, CA
415 760-2878 San Francisco, CA
415 7600-2222 San Francisco, CA
419 311 Toledo, OH
502 2002222222 Frankfort/Louisville/Paducah/Shelbyville, KY
502 997-555-1212 Frankfort/Louisville/Paducah/Shelbyville, KY
503 611 Portland, OR
503 999 Portland, OR (GTE)
504 99882233 Baton Rouge/New Orleans, LA
504 201-269-1111 Baton Rouge/New Orleans, LA
504 998 Baton Rouge/New Orleans, LA
504 99851-0000000000 Baton Rouge/New Orleans, LA
508 958 Fall River/New Bedford/Worchester, MA
508 200-222-1234 Fall River/New Bedford/Worchester, MA
508 200-222-2222 Fall River/New Bedford/Worchester, MA
508 26011 Fall River/New Bedford/Worchester, MA
509 560 Spokane/Walla Walla/Yakima, WA
512 830 Austin/Corpus Christi, TX
512 970-xxxx Austin/Corpus Christi, TX
515 5463 Des Moines, IA
515 811 Des Moines, IA
516 958 Hempstead/Long Island, NY
516 968 Hempstead/Long Island, NY
517 200-222-2222 Bay City/Jackson/Lansing, MI
517 200200200200200 Bay City/Jackson/Lansing, MI
518 997 Albany/Schenectady/Troy, NY
518 998 Albany/Schenectady/Troy, NY
603 200-222-2222 NH
606 997-555-1212 Ashland/Winchester, KY
606 711 Ashland/Winchester, KY
607 993 Binghamton/Elmira, NY
609 958 Atlantic City/Camden/Trenton/Vineland, NJ
610 958 Allentown/Reading, PA
612 511 Minneapolis/St.Paul, MN
614 200 Columbus/Steubenville, OH
614 571 Columbus/Steubenville, OH
615 200200200200200 Chatanooga/Knoxville/Nashville, TN
615 2002222222 Chatanooga/Knoxville/Nashville, TN
615 830 Nashville, TN
616 200-222-2222 Battle Creek/Grand Rapids/Kalamazoo, MI
617 200-222-1234 Boston, MA
617 200-222-2222 Boston, MA
617 200-444-4444 Boston, MA (Woburn, MA)
617 220-2622 Boston, MA
617 958 Boston, MA
618 200-xxx-xxxx Alton/Cairo/Mt.Vernon, IL
618 930 Alton/Cairo/Mt.Vernon, IL
619 211-2001 San Diego, CA
703 811 Alexandria/Arlington/Roanoke, VA
704 311 Asheville/Charlotte, NC
708 1-200-555-1212 Chicago/Elgin, IL
708 1-200-8825 Chicago/Elgin, IL (Last four change rapidly)
708 200-6153 Chicago/Elgin, IL
708 724-9951 Chicago/Elgin, IL
708 356-9646 Chicago/Elgin, IL
713 380 Houston, TX
713 970-xxxx Houston, TX
713 811 Humble, TX
714 114 Anaheim, CA (GTE)
714 211-2121 Anaheim, CA (PacBell)
714 211-2222 Anaheim, CA (Pacbell)
716 511 Buffalo/Niagara Falls/Rochester, NY (Rochester Tel)
716 990 Buffalo/Niagara Falls/Rochester, NY (Rochester Tel)
717 958 Harrisburg/Scranton/Wilkes-Barre, PA
718 958 Bronx/Brooklyn/Queens/Staten Island, NY
802 2-222-222-2222 Vermont
802 200-222-2222 Vermont
802 1-700-222-2222 Vermont
802 111-2222 Vermont
805 114 Bakersfield/Santa Barbara, CA
805 211-2345 Bakersfield/Santa Barbara, CA
805 211-2346 Bakersfield/Santa Barbara, CA (Returns DTMF)
805 830 Bakersfield/Santa Barbara, CA
806 970-xxxx Amarillo/Lubbock, TX
810 200200200200200 Flint/Pontiac/Southfield/Troy, MI
812 410-555-1212 Evansville, IN
813 311 Ft. Meyers/St. Petersburg/Tampa, FL
815 200-xxx-xxxx La Salle/Rockford, IL
815 290 La Salle/Rockford, IL
817 211 Ft. Worth/Waco, TX
817 970-611-1111 Ft. Worth/Waco, TX (Southwestern Bell)
818 1223 Pasadena, CA (Some 1AESS switches)
818 211-2345 Pasadena, CA (English response)
818 211-2346 Pasadena, CA (DTMF response)
903 970-611-1111 Denison, TX
906 1-200-222-2222 Marquette/Sault Ste. Marie, MI
908 958 New Brunswick, NJ
910 200 Fayetteville/Greensboro/Raleigh/Winston-Salem, NC
910 311 Fayetteville/Greensboro/Raleigh/Winston-Salem, NC
910 988 Fayetteville/Greensboro/Raleigh/Winston-Salem, NC
914 990-1111 Peekskill/Poughkeepsie/White Plains/Yonkers, NY
915 970-xxxx Abilene/El Paso, TX
916 211-2222 Sacramento, CA (Pac Bell)
916 461 Sacramento, CA (Roseville Telepohone)
919 200 Durham, NC
919 711 Durham, NC
Canada:
204 644-xxxx Manitoba
306 115 Saskatchewan, Canada
403 311 Alberta, Yukon and N.W. Territory
403 908-222-2222 Alberta, Yukon and N.W. Territory
403 999 Alberta, Yukon and N.W. Territory
416 997-xxxx Toronto, Ontario
506 1-555-1313 New Brunswick
514 320-xxxx Montreal, Quebec
519 320-xxxx London, Ontario
604 1116 British Columbia, Canada
604 1211 British Columbia, Canada
604 211 British Columbia, Canada
613 320-2232 Ottawa, Ontario
705 320-4567 North Bay/Saulte Ste. Marie, Ontario
Australia:
+61 03-552-4111 Victoria 03 area
+612 19123 All major capital cities
United Kingdom:
175
12. What is a ringback number?
A ringback number is a number that you call that will immediately
ring the telephone from which it was called.
In most instances you must call the ringback number, quickly hang up
the phone for just a short moment and then let up on the switch, you
will then go back off hook and hear a different tone. You may then
hang up. You will be called back seconds later.
13. What is the ringback number for my area?
An 'x' means insert those numbers from the phone number from which you
are calling. A '?' means that the number varies from switch to switch
in the area, or changes from time to time. Try all possible
combinations.
If the ringback for your NPA is not listed, try common ones such as
954, 957 and 958. Also, try using the numbers listed for other NPA's
served by your telephone company.
NPA Ringback number Geographic area
--- --------------- ---------------------------------------------
201 55?-xxxx Hackensack/Jersey City/Newark/Paterson, NJ
202 958-xxxx District of Columbia
203 99?-xxxx CT
208 99xxx-xxxx ID
213 1-95x-xxxx Los Angeles, CA
219 571-xxx-xxxx Gary/Hammond/Michigan City/Southbend, IN
219 777-xxx-xxxx Gary/Hammond/Michigan City/Southbend, IN
301 579-xxxx Hagerstown/Rockville, MD
301 958-xxxx Hagerstown/Rockville, MD
303 99X-xxxx Grand Junction, CO
304 998-xxxx WV
305 999-xxxx Ft. Lauderdale/Key West/Miami, FL
312 511-xxxx Chicago, IL
312 511-xxx-xxxx Chicago, IL
312 57?-xxxx Chicago, IL
315 98x-xxxx Syracuse/Utica, NY
317 777-xxxx Indianapolis/Kokomo, IN
317 yyy-xxxx Indianapolis/Kokomo, IN (y=3rd digit of phone number)
319 79x-xxxx Davenport/Dubuque, Iowa
401 98?-xxxx RI
404 450-xxxx Atlanta, GA
407 988-xxxx Orlando/West Palm Beach, FL
412 985-xxxx Pittsburgh, PA
414 977-xxxx Fond du Lac/Green Bay/Milwaukee/Racine, WI
414 978-xxxx Fond du Lac/Green Bay/Milwaukee/Racine, WI
415 350-xxxx San Francisco, CA
417 551-xxxx Joplin/Springfield, MO
501 221-xxx-xxxx AR
501 721-xxx-xxxx AR
502 988 Frankfort/Louisville/Paducah/Shelbyville, KY
503 541-XXXX OR
504 99x-xxxx Baton Rouge/New Orleans, LA
504 9988776655 Baton Rouge/New Orleans, LA
505 59?-xxxx New Mexico
512 95X-xxxx Austin, TX
513 99?-xxxx Cincinnati/Dayton, OH
513 955-xxxx Cincinnati/Dayton, OH
516 660-xxx-xxxx Hempstead/Long Island, NY
601 777-xxxx MS
609 55?-xxxx Atlantic City/Camden/Trenton/Vineland, NJ
612 511 Minneapolis/St.Paul, MN
612 999-xxx-xxxx Minneapolis/St.Paul, MN
614 998-xxxx Columbus/Steubenville, OH
615 930-xxxx Chatanooga/Knoxville/Nashville, TN
616 946-xxxx Battle Creek/Grand Rapids/Kalamazoo, MI
619 331-xxxx San Diego, CA
619 332-xxxx San Diego, CA
703 958-xxxx Alexandria/Arlington/Roanoke, VA
708 511-xxxx Chicago/Elgin, IL
714 330? Anaheim, CA (GTE)
714 33?-xxxx Anaheim, CA (PacBell)
716 981-xxxx Rochester, NY (Rochester Tel)
718 660-xxxx Bronx/Brooklyn/Queens/Staten Island, NY
719 99x-xxxx Colorado Springs/Leadville/Pueblo, CO
801 938-xxxx Utah
801 939-xxxx Utah
802 987-xxxx Vermont
804 260 Charlottesville/Newport News/Norfolk/Richmond, VA
805 114 Bakersfield/Santa Barbara, CA
805 980-xxxx Bakersfield/Santa Barbara, CA
810 951-xxx-xxxx Pontiac/Southfield/Troy, MI
813 711 Ft. Meyers/St. Petersburg/Tampa, FL
817 971 Ft. Worth/Waco, TX (Flashhook, then 2#)
906 951-xxx-xxxx Marquette/Sault Ste. Marie, MI
908 55?-xxxx New Brunswick, NJ
908 953 New Brunswick, NJ
913 951-xxxx Lawrence/Salina/Topeka, KS
914 660-xxxx Peekskill/Poughkeepsie/White Plains/Yonkers, NY
Australia: +61 199
Brazil: 199
New Zealand: 137
Sweden: 0058
United Kingdom: 174 or 1744 or 175 or 0500-89-0011
14. What is a loop?
This FAQ answer is excerpted from: ToneLoc v0.99 User Manual
by Minor Threat & Mucho Maas
Loops are a pair of phone numbers, usually consecutive, like 836-9998
and 836-9999. They are used by the phone company for testing. What
good do loops do us? Well, they are cool in a few ways. Here is a
simple use of loops. Each loop has two ends, a 'high' end, and a
'low' end. One end gives a (usually) constant, loud tone when it is
called. The other end is silent. Loops don't usually ring either.
When BOTH ends are called, the people that called each end can talk
through the loop. Some loops are voice filtered and won't pass
anything but a constant tone; these aren't much use to you. Here's
what you can use working loops for: billing phone calls! First, call
the end that gives the loud tone. Then if the operator or someone
calls the other end, the tone will go quiet. Act like the phone just
rang and you answered it ... say "Hello", "Allo", "Chow", "Yo", or
what the fuck ever. The operator thinks that she just called you, and
that's it! Now the phone bill will go to the loop, and your local
RBOC will get the bill! Use this technique in moderation, or the loop
may go down. Loops are probably most useful when you want to talk to
someone to whom you don't want to give your phone number.
15. What is a loop in my area?
Many of these loops are no longer functional. If you are local
to any of these loops, please try them out an e-mail me the results
of your research.
CNA stands for Customer Name and Address. The CNA number is a phone
number for telephone company personnel to call and get the name and
address for a phone number. If a telephone lineman finds a phone line
he does not recognize, he can use the ANI number to find it's phone
number and then call the CNA operator to see who owns it and where
they live.
Normal CNA numbers are available only to telephone company personnel.
Private citizens may legally get CNA information from private
companies. Two such companies are:
Unidirectory (900)933-3330
Telename (900)884-1212
Note that these are 900 numbers, and will cost you approximately one
dollar per minute.
If you are in 312 or 708, AmeriTech has a pay-for-play CNA service
available to the general public. The number is 796-9600. The cost is
$.35/call and can look up two numbers per call.
If you are in 415, Pacific Bell offers a public access CNA service at
(415)781-5271.
An interesting number is The House of Windsor Collection at
(800)433-3210. If you dial it and press 1 to request a catalog, it
will ask for your telephone number. If will then tell you the street
name of any telephone number you enter.
17. What is the telephone company CNA number for my area?
203 203-771-8080 CT
516 516-321-5700 Hempstead/Long Island, NY
614 614-464-0123 Columbus/Steubenville, OH
813 813-270-8711 Ft. Meyers/St. Petersburg/Tampa, FL
513 513-397-9110 Cincinnati/Dayton, OH
18. What are some numbers that always ring busy?
216 xxx-9887 Akron/Canton/Cleveland/Lorain/Youngstown, OH
303 431-0000 Denver, CO
303 866-8660 Denver, CO
316 952-7265 Dodge City/Wichita, KS
501 377-99xx AR
719 472-3773 Colorado Springs/Leadville/Pueblo, CO
805 255-0699 Bakersfield/Santa Barbara, CA
818 885-0699 Pasadena, CA
906 632-9999 Marquette/Sault Ste. Marie, MI
906 635-9999 Marquette/Sault Ste. Marie, MI
914 576-9903 Peekskill/Poughkeepsie/White Plains/Yonkers, NY
19. What are some numbers that temporarily disconnect phone service?
314 511 Columbia/Jefferson City/St.Louis, MO (1 minute)
404 420 Atlanta, GA (5 minutes)
405 953 Enid/Oklahoma City, OK (1 minute)
407 511 Orlando/West Palm Beach, FL (1 minute)
512 200 Austin/Corpus Christi, TX (1 minute)
516 480 Hempstead/Long Island, NY (1 minute)
603 980 NH
614 xxx-9894 Columbus/Steubenville, OH
805 119 Bakersfield/Santa Barbara, CA (3 minutes)
919 211 or 511 Durham, NC (10 min - 1 hour)
20. What is scanning?
Scanning is dialing a large number of telephone numbers in the hope
of finding interesting carriers (computers) or tones.
Scanning can be done by hand, although dialing several thousand
telephone numbers by hand is extremely boring and takes a long time.
Much better is to use a scanning program, sometimes called a war
dialer or a demon dialer. Currently, the best war dialer available to
PC-DOS users is ToneLoc from Minor Threat and Mucho Maas. ToneLoc can
be ftp'd from ftp.paranoia.com /pub/toneloc/.
A war dialer will dial a range of numbers and log what it finds at
each number. You can then only dial up the numbers that the war
dialer marked as carriers or tones.
21. Is scanning illegal?
Excerpt from: 2600, Spring 1990, Page 27:
-BQ-
In some places, scanning has been made illegal. It would be hard,
though, for someone to file a complaint against you for scanning since
the whole purpose is to call every number once and only once. It's
not likely to be thought of as harassment by anyone who gets a single
phone call from a scanning computer. Some central offices have been
known to react strangely when people start scanning. Sometimes you're
unable to get a dialtone for hours after you start scanning. But
there is no uniform policy. The best thing to do is to first find out
if you've got some crazy law saying you can't do it. If, as is
likely, there is no such law, the only way to find out what happens is
to give it a try.
-EQ-
It should be noted that a law making scanning illegal was recently
passed in Colorado Springs, CO. It is now illegal to place a call
in Colorado Springs without the intent to communicate.
22. Where can I purchase a lineman's handset?
Contact East
335 Willow Street
North Andover, MA 01845-5995
(508)682-2000
Jensen Tools
7815 S. 46th Street
Phoenix, AZ 85044-5399
Time Motion Tools
12778 Brookprinter Place
Poway, CA 92064
(619)679-0303
23. What are the DTMF frequencies?
DTMF stands for Dual Tone Multi Frequency. These are the tones you
get when you press a key on your telephone touchpad. The tone of the
button is the sum of the column and row tones. The ABCD keys do not
exist on standard telephones.
1209 1336 1477 1633
697 1 2 3 A
770 4 5 6 B
852 7 8 9 C
941 * 0 # D
24. What are the frequencies of the telephone tones?
Type Hz On Off
---------------------------------------------------------------------
Dial Tone 350 & 400 --- ---
Busy Signal 480 & 620 0.5 0.5
Toll Congestion 480 & 620 0.2 0.3
Ringback (Normal) 440 & 480 2.0 4.0
Ringback (PBX) 440 & 480 1.5 4.5
Reorder (Local) 480 & 620 3.0 2.0
Invalid Number 200 & 400
Hang Up Warning 1400 & 2060 0.1 0.1
Hang Up 2450 & 2600 --- ---
25. What are all of the * (LASS) codes?
Local Area Signalling Services (LASS) and Custom Calling Feature
Control Codes:
(These appear to be standard, but may be changed locally)
[C1] - Means code used for Cellular One service
[1] - for cellular in Pittsburgh, PA A/C 412 in some areas
[2] - indicates that you are not local and maybe how to reach you
[3] - found in Pac Bell territory; Intercom ring causes a distinctive
ring to be generated on the current line; Hold keeps a call
connected until another extension is picked up
[4] - applied once before each call
[5] - A.C.R. blocks calls from those who blocked Caller ID
(used in C&P territory, for instance)
[6] - cancels further return attempts
[M: *xx] - alternate code used for MLVP (multi-line variety package)
by Bellcore. It goes by different names in different RBOCs.
In Bellsouth it is called Prestige. It is an arrangement of
ESSEX like features for single or small multiple line groups.
The reason for different codes for some features in MLVP is that
call-pickup is *8 in MLVP so all *8x codes are reaasigned *5x
26. What frequencies do cordless phones operate on?
Here are the frequencies for the first generation 46/49mhz phones.
The new 900mhz cordless phones are not covered.
Calling Number Delivery (CND), better known as Caller ID, is a
telephone service intended for residential and small business
customers. It allows the called Customer Premises Equipment (CPE) to
receive a calling party's directory number and the date and time of
the call during the first 4 second silent interval in the ringing
cycle.
Parameters
~~~~~~~~~~
The data signalling interface has the following characteristics:
Protocol
~~~~~~~~
The protocol uses 8-bit data words (bytes), each bounded by a start
bit and a stop bit. The CND message uses the Single Data Message
format shown below.
| Channel | Carrier | Message | Message | Data | Checksum |
| Seizure | Signal | Type | Length | Word(s) | Word |
| Signal | | Word | Word | | |
Channel Siezure Signal
~~~~~~~~~~~~~~~~~~~~~~
The channel seizure is 30 continuous bytes of 55h (01010101) providing
a detectable alternating function to the CPE (i.e. the modem data
pump).
Carrier Signal
~~~~~~~~~~~~~~
The carrier signal consists of 130 +/- 25 mS of mark (1200 Hz) to
condition the receiver for data.
Message Type Word
~~~~~~~~~~~~~~~~~
The message type word indicates the service and capability associated
with the data message. The message type word for CND is 04h
(00000100).
Message Length Word
~~~~~~~~~~~~~~~~~~~
The message length word specifies the total number of data words to
follow.
Data Words
~~~~~~~~~~
The data words are encoded in ASCII and represent the following
information:
o The first two words represent the month
o The next two words represent the day of the month
o The next two words represent the hour in local military time
o The next two words represent the minute after the hour
o The calling party's directory number is represented by the
remaining words in the data word field
If the calling party's directory number is not available to the
terminating central office, the data word field contains an ASCII "O".
If the calling party invokes the privacy capability, the data word
field contains an ASCII "P".
Checksum Word
~~~~~~~~~~~~~
The Checksum Word contains the twos complement of the modulo 256 sum
of the other words in the data message (i.e., message type, message
length, and data words). The receiving equipment may calculate the
modulo 256 sum of the received words and add this sum to the reveived
checksum word. A result of zero generally indicates that the message
was correctly received. Message retransmission is not supported.
Example CNS Single Data Message
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
An example of a received CND message, beginning with the message type
word, follows:
04h= Calling number delivery information code (message type word)
12h= 18 decimal; Number of data words (date,time, and directory
number words)
ASCII 30,39= 09; September
ASCII 33,30= 30; 30th day
ASCII 31,32= 12; 12:00 PM
ASCII 32,34= 24; 24 minutes (i.e., 12:24 PM)
ASCII 36,30,39,35,35,35,31,32,31,32= (609) 555-1212; calling
party's directory number
51h= Checksum Word
Data Access Arrangement (DAA) Requirements
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To receive CND information, the modem monitors the phone line between
the first and second ring bursts without causing the DAA to go off
hook in the conventional sense, which would inhibit the transmission
of CND by the local central office. A simple modification to an
existing DAA circuit easily accomplishes the task.
Modem Requirements
~~~~~~~~~~~~~~~~~~
Although the data signalling interface parameters match those of a
Bell 202 modem, the receiving CPE need not be a Bell 202 modem. A
V.23 1200 bps modem receiver may be used to demodulate the Bell 202
signal. The ring indicate bit (RI) may be used on a modem to indicate
when to monitor the phone line for CND information. After the RI bit
sets, indicating the first ring burst, the host waits for the RI bit
to reset. The host then configures the modem to monitor the phone
line for CND information.
Signalling
~~~~~~~~~~
According to Bellcore specifications, CND signalling starts as early
as 300 mS after the first ring burst and ends at least 475 mS before
the second ring burst
Applications
~~~~~~~~~~~~
Once CND information is received the user may process the information
in a number of ways.
1. The date, time, and calling party's directory number can be
displayed.
2. Using a look-up table, the calling party's directory number can be
correlated with his or her name and the name displayed.
3. CND information can also be used in additional ways such as for:
a. Bulletin board applications
b. Black-listing applications
c. Keeping logs of system user calls, or
d. Implementing a telemarketing data base
References
~~~~~~~~~~
For more information on Calling Number Delivery (CND), refer to
Bellcore publications TR-TSY-000030 and TR-TSY-000031.
To obtain Bellcore documents contact:
Bellcore Customer Service
60 New England Avenue, Room 1B252
Piscataway, NJ 08834-4196
(908) 699-5800
28. What is a PBX?
A PBX is a Private Branch Exchange. A PBX is a small telephone switch
owned by a company or organization. Let's say your company has a
thousand employees. Without a PBX, you would need a thousand phone
lines. However, only 10% of your employees are talking on the phone
at one time. What if you had a computer that automatically found an
outside line every time one of your employees picked up the telephone.
With this type of system, you could get by with only paying for one
hundred phone lines. This is a PBX.
29. What is a VMB?
A VMB is a Voice Mail Box. A VMB is a computer that acts as an
answering machine for hundreds or thousands of users. Each user will
have their own Voice Mail Box on the system. Each mail box will have
a box number and a pass code.
Without a passcode, you will usually be able to leave messages to
users on the VMB system. With a passcode, you can read messages and
administer a mailbox. Often, mailboxes will exist that were created
by default or are no longer used. These mailboxes may be taken over
by guessing their passcode. Often the passcode will be the mailbox
number or a common number such as 1234.
Section C: Resources
~~~~~~~~~~~~~~~~~~~~
01. What are some ftp sites of interest to hackers?
02. What are some fsp sites of interest to hackers?
Third Stone From the Sun 132.241.180.91 6969
03. What are some newsgroups of interest to hackers?
alt.2600 Do it 'til it hertz
alt.2600.hope.tech Technology concerns for Hackers on Planet Earth 1994
alt.cellular
alt.cellular-phone-tech
alt.comp.virus
alt.cyberpunk High-tech low-life.
alt.cyberspace Cyberspace and how it should work.
alt.dcom.telecom Discussion of telecommunications technology
alt.engr.explosives [no description available]
alt.hackers Descriptions of projects currently under development
alt.locksmithing You locked your keys in *where*?
alt.hackers.malicious The really bad guys - don't take candy from them
alt.ph.uk
alt.privacy.anon-server Tech. & policy matters of anonymous contact servers
alt.radio.pirate Hide the gear, here comes the magic station-wagons.
alt.radio.scanner Discussion of scanning radio receivers.
alt.satellite.tv.europe
alt.security Security issues on computer systems
alt.security.index Pointers to good stuff in misc.security (Moderated)
alt.security.keydist Exchange of keys for public key encryption systems
alt.security.pgp The Pretty Good Privacy package
alt.security.ripem A secure email system illegal to export from the US
comp.dcom.cellular [no description available]
comp.dcom.telecom Telecommunications digest (Moderated)
comp.dcom.telecom.tech [no description available]
comp.org.cpsr.announce Computer Professionals for Social Responsibility
comp.org.cpsr.talk Issues of computing and social responsibility
comp.org.eff.news News from the Electronic Frontiers Foundation
comp.org.eff.talk Discussion of EFF goals, strategies, etc.
comp.protocols.kerberos The Kerberos authentification server
comp.protocols.tcp-ip TCP and IP network protocols
comp.risks Risks to the public from computers & users
comp.security.announce Announcements from the CERT about security
comp.security.misc Security issues of computers and networks
comp.security.unix Discussion of Unix security
comp.virus Computer viruses & security (Moderated)
de.org.ccc Mitteilungen des CCC e.V.
misc.security Security in general, not just computers (Moderated)
rec.pyrotechnics Fireworks, rocketry, safety, & other topics
rec.radio.scanner [no description available]
rec.video.cable-tv Technical and regulatory issues of cable television
sci.crypt Different methods of data en/decryption
04. What are some telnet sites of interest to hackers?
Vova
