Page 2 June, 1987 2600

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----''Faun.,· If l='m �t1Z( sell 77;15 ivrkeX

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UfP£RBANDj

When you need a hand selling your favorite cause, we can help with full design. typesetting, compositIOn, and printing services, all under one roof, Drop us a line,

UPPERHAND 12 Whitfield Lane Coram, NY 11 727

Or coil us via 2600, (516)751-2600

Our first ever public get-together was held in New York City earlier this month. It certainly won't be our last.

The opportunity to talk with some of our readers and get "real-time"feedback is something we don't take lightly. That's why we'll be back on future Friday afternoons.

While our New York City get­togethers will happen nearly every week, we will be stopping in other places as well. On Friday, July 31, we'll be in Philadelphia. Just where exactly we don't know yet. Look for specifics in the July issue or call the office after July 1 st. Otherwise look for us in the Citicorp Center in New York Fridays at 5.

Our first meeting literally drew people from across the country. We thank them for the trouble. We had quite an interesting gro�crossing nearly all

age and ethnic groups. Not too many females, though. Why is that anyway?

Besides getting a few new writers and attracting some curious onlookers, we discu.�sed some important matters. How to store back issues without loose-leaf holes seems to be on everyone's mind. There is a task force working on that. The future of 2600 bulletin boards was also talked about. Since the Private Sector is no longer in existence, we are in the process of looking for bulletin boards across the country, possibly serving as a network. We seem to have an abundance of software and sysops around here-what we need to know from the rest of our readers is what's open in other parts of the country and the world. If you'd like to run a BBS, write or call us and tell us what kind of equipment you have and what you'd like to see.

STAFFBOX

Editor and Publisher Eric Corley 110

Office Manager

Fran Westbrook Cover Art

Tish Va Iter Koch

Writers: John Drake, Paul Estev, Dan Foley, Mr. French, Emmanuel Goldstein, Chester Holmes, The Kid & Company, Lex Luthor, Bill from RNOC, David Ruderman, Bernie S., Mike Salerno, Silent Switchman, Mike Yuhas, and the usual anonymous bunch.

Production: Mike DeVoursney. Cartoonists: Dan Holder, Mike Marshall. Editor Emeritus: TSH.

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2600 June. 1 987 Pal(e 3

ALLNET: by Mike Yuhas

A feature in April's 2600 noted that Alinet would give customers five bucks credit if they persuaded a friend to sign up for AHnet's equal access service. If you recaH, this pyramid scheme was a wee bit deceiving-the friend would need to designate AHnet as their primary carrier. April must have surely been a good month for promotional creativity over at AHnet: I ended up with AHnet as my primary carrier, without my consent!!!

This tale begins in February, shortly after I had started a new job. Part of my job requirement is to spend some time on the phone talking to clients, etc., in the evenings. Since these calls would be reimbursed by my company, I decided to use another long distance carrier to make accounting easier. At random, I chose AHnet. This was to be a stopgap measure until I had received my MCI Cards (TM).

(Remember that with equal access, if you want to make calls on a secondary carrier, i.e., not your primary carrier, all you would need do is dial lOX XX (XXX being the identification code of the secondary carrier) plus the number you wish to reach. The local Bell company would then bill you in the event you didn't have an account with this carrier. It's also interesting to note that this billing cycle is often delayed by several months.)

I Page 4 June, 1987 1600

I

A few weeks after I had made a bunch of Allnet calls, I got a call from someone who claimed she was from Allnet, saying that her records indicated I had been using Allnet, and would I give her my name and address so Allnet would bill me directly, instead of letting my local Bell company bill me. It sounded like a reasonable request-they wanted to get their funds quicker-so I asked her to recite some of the numbers I dialed to prove her affiliation. Thus convinced, I gaye her the information she asked for. At no time did she mention anything about setting me up with Allnet as my primary carrier.

But that is precisely what happened. A few days later, my postman delivered

a form letter: "Welcome to Allnet 'Dial-I' Long Distance Service. You now have the benefits .... You are a highly valued Allnet c u s t o m e r . . . ... a n d a l o a d o f o t h e r diplomatic rubbish from Allnet's Director of Customer Service, Elaine Delves. It listed a toll free customer service number, 800-982-4422, for questions, changes and "suggestions for improving our service." I felt my blood pressure rise about fifty bizillion points as I read. I wanted Sprint back!!! Of course, I called their number, and was put on hold for about 20 minutes. The fellow who finally answered said that no one in customer service had switched me over to Allnet, so naturally there was

A Horror Story absolute(1' nothing he could do to remedy the situation. He suggested I call my local Allnet office on 215-567-80!S0.

Bennett Kolber, who is apparently s o m e s o r t of big s h o t in A lin e t ' s Philadelphia office, listened to my story: That Allnet had surreptitiously (and you thought only hackers and the folks in the Nat i o n a l S e c u r i t y Co u nci l a c t e d surreptitiously) connected me to their network, and I wanted to be reconnected back to Sprint, and that I would not call my local Bell company to make those armngements due to the principle of the thing, not to mention that they'd charge me five bucks for the change. My plight must have really hit home with him because he said he'd look in to the matter and promised - promised-- -- that I'd get connected back to Sprint within a couple of days.

Unfortunately,' he did not define the term "couple. "

I had spoken with him a "couple" of times to try to resolve the affair in an expeditious manner. I got nowhere. I then spoke with Steve Edmonds, who also s eem e d s i n c e r e l y d i s t u r b e d b y m y

situation. I thought m y fortunes would change.

My fortunes stayed the same. Now I was mad. I spoke to a bigger big

shot named Bill Love. He was new on the job, he said, but he would rectify my problem immediate(l'. After waiting a week, I called again. And again. He finally said something like this: "I'm sorry, okay, that it's taken us, okay, so long, okay, to get this matter resolved. But since I, okay, don't represent Sprint, okay, or your company, okay, there's no way, okay, that we can switch you back, okay, to Sprint." (He really did talk that way.) In short, I would have to call my local Bell company, armnge to be disconnected from Allnet, and deduct the $5 charge from my bill.

There have got to be serious internal problems with a company that asserts that I am "a highly valued customer" but seems to go out of its way to make me feel damn sure that I won't do business with them in this century, if I can help it. It took these clowns over a month to tell me that they were indeed powerless to satisfy me, but my local Bell company had the problem fixed in one five-minute phone call.

paging for free by Bernia S.

D i d you ever want a beeper or pag ing service but dec ide against i t because of the cost? Wel l , i n many areas the local voice-paging system can be used w i thout charge!

F i rst , a brief descript ion of how a VOice-paging system works. M any voice-pag ing systems work by broadcast ing a l l pag ing traff ic on the same rad io f requency in the VHF band around 150 M hz. A l l pagers on that system are tuned to the same rad io f requency but each one has an audio tone decoder tuned to a un ique sequence of aud io tones. Every subscriber is assigned a d ifferent local or to l l -free phone number that people should cal l when they want to reach h im through h is

pager. When that number is d ialed , the cal ler hears a tone which prompts h im to start his

. verbal message. This is l im i ted to a few seconds , after which another tone cuts h im off. This voice message is then temporari ly stored in an audio tape buffer or a dig ita l memory subsystem before being routed to the pag ing t ransmi tter. A unique tone sequence is broadcast just prior to the voice message which tr iggers the appropriate pag ing receiver so the subscriber only hears messages intended for h im and not everyone e lse's on that same frequency. The pager t imes out after the f ixed- length message is over.

A couple of years ago whi le l isten ing to the

(continued on page 21) 2600 June, 1 987 Page 5

A HACKERS GUIDE (Ticket Box)

VFY OVR SCN INW EMR SES INT

(NonCoin)

Sta 0+ 0-

(Display)

(--- Coin I ----) Sta 0+ 0- Pst Tne

Pay

(---- Hotel ---. ) Sta 0+ 0- Gst

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AS AS AS

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100-8 TSPS Console Layout

4

7

Abbreviations in capital letters are illuminated keys Abbreviations in lower case are non-illuminated keys Abbreviations in upper and lower case are lamps only

by The Mlraudlr and The Lagion of Doom

2 3

5 6 ST

8 9

0

Number Plate

I n th is art ic le we w i l l d iscuss the basic layout , descr ipt ion, and use o f the keys found o n the standard AT&T 100-8 TSPS ConsolI. Possible uses for the i nformat ion contained here in (besides for just want ing to know about the TSPS Conso le) are primari ly social eng ineering app l icat ions. The more you know about operators and the i r jobs , the more you can get them to do things for you . . . .

keys on the various consoles , they w i l l general ly resemble the above layout closely. I n the lower r ight hand comer you w i l l not ice the numbers O-g la id out i n to what resembles a keypad , which is exactly what i t is . The TSPS Operator (TSo) uses this keypad for keying in not only routing i nformat ion ( phone numbers , i nward rout ings , etc . ) but as a mUlt i-purpose tool for entering various numeric codes recognized by the TSPS software i tse l f . Rout ing i nformat ion app l ied onto the trunks from the TSPS pos i t ion is done using MF (mu l t i - frequency) tones. When a TSO keys in

Above is the standard AT&T 100-8 conso le layout . Whi le there may be add i t ional or d ifferent

Page 6 June, 1987 1600

TO THE TSPS CONSOLE a number or routing , the console buffers the KP+inlormalion digits unt i l the ST (start ) key is pressed , at which t ime it p lays the buffered KP+info d ig i ts+ST onto the trunk in a uniformly spaced sequence . So if you were somehow able to l i sten in on a TSO actual ly routing a cal l , it wou ld not sound l ike someone placing a cal l on a standard touch-tone telephone (or home-made b lue box) , but more l i ke someone pressing a "redial key" on a touch-tone phone, except that the tones would be MF tones , not touch tones. The duration of the tone and space between the tones are a network-wide standard , al though the network in most cases is quite tolerant to dev i at i ons of this standard. (Th i s " l oose" tolerance is what al lows us to simulate in-band signa l l ing with our blue boxes) .

A t the upper left hand side of the diagram you wi l l see the ticket box. This box has 4 slots marked New, Cancel , Scratch, and Completed. I bel ieve this is used for manual ly f i l led out trouble and/or t ime tickets. As far as I know, manual ly f i l led t ime tickets are a thing of the past , however in case of equ ipment fai lure the t ickets are presumably avai lable. The TSO wou ld manual ly fi l l out a trouble t icket to report trouble reaching a number out of her LAN ( Local Area Network-or the area directly served by her particu lar TSPS posit ion ) , whereas t o report trouble with a number i n her LAN she wou ld simply key in a trouble code ( u ti l i z i ng the KP-TRBl (Troub l e ) key ) to automatical ly place a trouble report .

To the right of the Ticket box you wi l l see the display. The display works in conjunct ion with certain keys on the console, and is used to d i s p l ay t i m i n g i n fo rmat i on (hours , m i nu tes , seconds ) , cost per m i nu te , ca l l i n g n umber ident ification (what most people refer to as TSPS ANI ) , numbers cal led , and various special codes. The console d isplay can be in one of two states , either d isplaying d ig its or d isplaying nothing (dark). Both of these states have different meanings when resul t ing from certain procedures attempted by a TSO . Lighted keys and lamps on the console can be in one of three states: not i l l u m i nated (dark ) , i l l um i nated , or f l ash i ng . Again , the state of a lampllamp-key means different things under different condit ions.

Below the Ticket box you wi l l see a row of 5

keys start i n g w i t h the key labe led "VFY" (Verify). These are various special purpose keys used by TSPS that have no real "grouping" unl ike the other "key groups". These are : ( VFY)-Ver i fy , i l l um i nated key . Used i n conjunction with the keypad , i t a l lows the TSO to verify ( l isten i n ) on a telephone cal l that is in progress, a lthough any conversation taking place on that cal l is scrambled to the TSO , and despite popular bel ief the scrambling process is done at the console level, and not on the trunk level. I f you were to somehow ga i n access to a verification trunk from a non-TSPS posit ion , the conversation would not be scrambled . (OVR SES)-Overseas, i l luminated key. Used in overseas cal l completion through an Overseas Tol l Completion Center/Server (IOCC) . I bel ieve it a lso al lows the TSO to key in more than 10 d ig its (standard POTS) for 1000 cal l completion. (SCN )-Screen , i l luminated key. L ights to not ify the TSO that an incoming cal l has an associated screen ing code (for example, 74=col lect cal ls on ly , 93=special bil l ing ) . Depressing th is key causes the code to show on display, and it's up to the TSO to decipher the code and explain its meaning to the customer if he/she is attempting something forbidden by his associated screening code. (For instance , prison phones have a screening code of 74 , al lowing them to place col lect cal ls only). (INW)-Inward , i l l uminated key . L ights to notify the TSO that the incoming cal l is "Operator to Operator" , therefore she answers by pressing the key and saying, " Inward". In most cases inward operators are actual ly TSPS operators with their inward lamps l i t . (EMR INT)-Emergency Interrupt, i l luminated key . Used in conjunction with the VFY key to i n terrupt a ca l l in progress wh i l e a l i ne verification is being done. Pressing this key causes an audible "beep" to be appl ied to the l ine, and de-activates the console scrambl ing (for roughly 30 seconds), a l lowing the TSO to talk to the parties being verified / interrupted . Use of this key and the VFY key , is constantly kept track of via various security and maintenance TTY's . Any abuse/misuse wil l set off alarms.

To the right of the above set of keys you w i l l see three groups of lamps/keys labeled "NOII­

(continued on page 15) 2600 June,1987 Page 7

the telecom informer BY DAN FOLEY

The passage of the Electronic Privacy Act (see the April column) provides a flimsy legal barrier to eavesdropping on cellular phone calls. The more logical response to eavesdropping would be encryption. There are many products on the market that encrypt telephone conversations (both cellular and normal wireline). These range from mere audio inverters (which take the voice signal and invert it--with training, one can even understand inverted conversations) to digitalizing the voice and passing the data stream through a DES encryption scheme. However, one then has to buy encryption gear at both ends of the call. Since the area of concern is the cellular link, it seems obvious that the cellular phone companies should provide this, and decrypt the call when it gets to their central switch before being passed to the normal phone lines. So far, only one cellular company does this-Bell Atlantic Mobile Systems. In the Washington and Baltimore area, Bell Atlantic offers central switch based cellular encryption. The cellular phone user, however, must buy the AT&T 1620E encryption device ($2,550), which has been approved by the National Security Agency. It uses a proprietary digital encryption algorithm, offering data transmission at 300, 1200, and 2400 bits per second. Scanner users will only hear a hissing if they attempt to listen in. This represents a step in the right direction, but until this becomes widespread, cellular phone users can't really depend on the privacy of their calls.

Violations An outspoken corporate supporter of

the new cellular privacy laws is now alleged to engage in illegal cellular interception. In a complaint filed with the FCC, Metroplex Telephone Company charged that its wireline

Page 8 June, 1987 2600

competitor in Dallas, Southwestern Bell Mobile Systems (SBMS), engages in "deliberate commercial spying" by monitoring data transmissions of the Metroplex network for its own competitive benefit. In its response, SBMS admitted that it monitored Metroplex transmissions, but only to "obtain an estimate of its market share" and "has not used the information for its own or another's benefit." SBMS said that "transmissions that may be intercepted by the use of readily available scanning equipment are not protectible," even though in Congressional testimony it argued for laws to protect communications privacy regardless of the technology used to provide the communications service. SBMS also termed the cellular signals it received "noncommunicative" and contended that Section 705 of the Communications Act (which prohibits unauthorized use of radio transmissions) "does not apply to cellular data transmissions." Metroplex replied that SBMS "presents a totally confused and inaccurate picture of interception law" and said that its competitor has been "caught with its hands in the cookie jar."

Predictions A market research report by Frost

and Sullivan projects a sixfold increase in the number of European cellular subscribers from the 240,000 using the service at the end of 1985. "This optimistic scenario is drawn for Europe in spite of acknowledged pitfalls as high subscriber costs and some poor reception quality," the research firm said in a news release. The report predicts that shipments of mobile phones will reach 510,000 by the end of the decade, amounting to $506 million. Usage revenues will amount to $984 million a year by then, yielding a total 1989 cellular market "just shy of $1.5 billion"

(continued on page 20)

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letters, po box 99 A 11I1"t'stery statement that A TM 11/ consists of ?a Dear 2600: b a d l y x e r o x e d p a g e s i s a gross

When we in Grand Blanc, MI had exaggeration! A copier allows us to

crossbar in the 694 and 695 exchange, economically make a smaller number

we could simply pick up the phone and of copies so that we can update

dial 930. If I fused two lines together publications when important new

you could enter a phone number after a information arrives.

short code thatwas shortly hacked out, (3) A TM 11/ has one "cartoon" and

and listen to anything on that line. does not contain "cartoons". Another

Could you explain just exactly what gross distortion made is the reviewer'S

that was, and/or how it worked? Now assertion that most of the newspaper

on ESS-5 it is busied out. clippings provided in A TM /1/ have

Silicon Rat and the Mice nothing to do with A 1 M fraud. A TM 11/

We don't know what it was you did, but summarizes 31 news articles. Of

if anyone out there has knowledge on these, 28 relate to A TM and debit

the subject, we'd be most happy to hear fraud, one to ATM networking, one to

about it. Numbers such as the one night depository crimes, and one to

you've mentioned have long been PAC contributions.

rumoured to exist. but conclusive proof (4) This review badly glosses over the

simply hasn't been presented three - page feedback questionnaire,

l R I which, in itself, contains many, many n ep Y ATM security insights. And it permits

Dear 2600: anyone to systematically make an in-This letter is to reply to your review of depth security analysis of ATMs. And,

A TM 11/ in the February issue of 2600. A by way of feedback, it provides us more few of the comments made about A TM specific info for future editions of A TM.

11/ were valid. However, the review (5) While the reviewer felt that my

contains so many gross and unfair statement, "ominous risks to our

distortions that I must question the freedoms and privacy" was "enter­reviewer's agenda. The reviewer's taining reading" to him, many people flippant attitude about our freedoms regard the impact of EFT devices upon and privacy reinforces this suspicion. our freedoms and privacy as extremely O u r r e s p o n s e t o s o me o f h i s g r a v e . A bout 75 percent of the

complaints are: feedback we receive regarding these

(1) The size of the print used in A TM "ravings" are favorable. About 25

11/ is 75 percent of elite type, and is percent are not. They add to the

larger than the print used in many seriousness of the work because they

n a t i o n a l publ icat ions . I t i s very make it clear that ATMs are a serious

readable. A TM 11/ is compactly and threat to average, law-abiding citizens.

concisely written and contains more (6) The current price of A TM 11/ is info in 18 pages than many books 100+ $20. If anyone wants to produce his

pages long. A TM 11/ is one of a kind- own, unique ATM publication at a

this info is not found in any other lower price, he's certainly entitled to do

publication available to the general so.

public! (7) 90+ percent of the material that

(2) A TM 11/ is reproduced on a Canon g o e s i n t o o u r p u b I i c a t i o n s i s

N P-155 copier. Some variations in contributed by readers. We are not

quality may exist,but to make a blanket afraid to publish anything on ATMs-

Page 12 June. 1987 2600

middle island , ny 1 1 953-0099 no matter how lengthy, detailed, or The A ce and Monitoring Times provide

shocking. But only If we can obtain that a great lo ok at the exciting a n d

info. W e are working on ATM IV. Please subversive world of radio. The A ce

contribute info to it . Our publ ications costs $ 1 2 a year and their address is

are what you make of them! PO Box 4 6 1 99, Baton Ro uge, LA

John J . Wil l iams 70895-46 1 99 (first 1 0-digit zip we 've

President, Consumertronics ever encountered). Monitoring Times

P . O . D rawer 537 is $ 1 5 a year and you can write to:

Alamogordo, NM 8831 0 G r o v e E n t e rp r is e s , P O B o x 9 8,

Military Madness Brasst� w,!,

. N

.C 2�902. P a yphone

Magazme IS In ItS thtrd year now. They

Dear 2600: I recently ordered a book that was

confiscated by the military. Apparently they feel 2600 is safe to read, so I don't mind the lack of an envelope. I do like the new format.

Thanks for the info on TA P and Compute!. I lost money on TA P.

I'd like to see more hardware info. I am fairly competent on computer architecture (I built a home-brew using a Z-80 and have started on a robot), but I can't find telecommunications stuff. I 'd like to build a modem for my home­brew. Any suggestions?

M D LP A ds in the 2600 Marketplace usually yield quick results. And they're free to subscribers.

More Publications Dear 2600:

As an avid info junkie, I suggest you print a list of recommended readings in a future iss u e . You often refer to publications that seem interesting and related to the info/telecom enthusiast, but are usually unobtainable at my local newsstand or library. Addresses a n d s u b s c r i p t i o n / s a m p l e c o p y information for magazines like The A ce , Mon itoring Times, Pa y Phone Magazine and no doubt many others w h i c h y o u r e c e i v e w o u l d b e appreciated . (How about contacting M a r k T o b i a s a n d p r i n t i n g a n unexpurgated version of his payphone article?)

I look forward to your reply. Best wishes from 2 1 6

Tabula Rasa

p r in t lo t s o f n e a t a r t ic l e s a n d a d v e r t is e m e n t s o n p a yp h o n e s . Subscriptions are $33 a year and their address is P. D. Box 423 7 1 , Houston. TX 77242. Let us know about any other good magazines out there.

A dditional Facts Dear 2600:

Regarding the mini-review of Who, What. and Where in Communications Security (page 2 1 , April issue), here are a few additional facts your readers might find useful :

( 1 ) The 1 98 1 edition was mostly 1 c o m p i l a t i o n of i n f o r m at i o n f r o m manufactu r er s ' b r o c h u r e s a b o u t security-related products, along with a "selected bibliog raphy " , a secti o n explaining commonly-used acronyms, a glossary of communications terms, and some introductory articles about various aspects of c o m m unications security . It ' s nice to h ave all t h at information in one place (even though it contained nothing that you cou ldn 't h a v e l e a r ne d b y r e a d i n g e a s i l y ­available trade journals, or attending any of the comsec conventions or trade s h o w s ) . but t h e p r i c e f o r t h i s convenience was a bit steep-$ 1 75.

(2 ) The above book was actually a minor revision of a study first done for Uncle. It first appeared as a National Telecommunications and Information Administration Contractor Report, # N T iA - C R - 80 - 9 , " U se r s ' [sic ] G u ide, V o i c e and D at a C o m m un i c a t i o n s

(continued on page 18)

2600 June, 1987 Page 1 3

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TSPS coin" , "Coin 1 " , and "HolIl" . The TSO ut i l izes the condit ion of these lamps to identify the status of incoming cal ls . There are three lamps that are common to each of the three groups . These are : (SIa) "Non-coin" lamp l ights when a non-coin cal ler requires TSPS assistance in placing an otherwise d irect-dialable cal l ( i n some rural areas that have l imited DDD features) . "Coin 1 " lamp l ights on d irect-dialed coin cal ls that are sent to TSPS for payment collection . "Hotel" l ights on H otel originated DDD cal ls . The TSPS also receives the room number the cal l is being originated from . (0+ ) L ights to s ign ify that the incoming cal l was orig inated by a customer dia l ing a "O+telephone number" for an operator assisted cal l in each of the three groups (co in , non-co in , hotel /motel ) . ( Example: i f a customer were t o place a "person­to -person ( o perator ass i sted ) ca l l f rom a payphone , th is wou ld cause the "0+" lamp in the "co i n " g roup to l i g h t , one p l aced f rom a resident ia l phone wou ld cause the "0+" lamp in the "non-coin" group to l ight , etc . ) (0- )-aka "D ial Zero" . Lights t o signify that the incoming cal l was originated by a customer simply d ia l ing 0 (zero ) , in each of the three categories (non-coin , coin , hotel/motel ) . (PST PAY)-Post Pay , i l luminated key . Th is shows up in the coin group on ly . I t 's depressed by the TSPS operator when a customer requests a "post pay" cal l f rom a payphone , al lowing him to deposi t the fu l l charge at the completion of the cal l . (TIII )-Tone , lamp. Th is shows u p i n the coin group only . I bel ieve this lamp l ights to inform the TSO that a coi n customer has f lashed his/her switchhook duri ng a cal l in progress , requesting operator assistance . (BST)-Guest , i l luminated key . Th is l ights on a l l hotel -originated cal ls .

Below the above rows of keys and to the far left you wi l l see a row of keys labled "Outgol" Trunks" . TSPS ut i l izes this group of keys to select various outgoing trunk groups . The keys are used as fo l lows : (DA)-Di rectory Assistance, i l l uminated key . Used by TSO to place calls to the directory assistance group. ( R&R)-Rate and Route , i l luminated key . Used

(continuedfrom page 7)

to place cal ls to rate and route . The Universal Rate and Route posit ion known to all you boxers is found at KP+.�OQ+1 41 +1 21 �+ST. (Editor's note: This has just been phased out. TSPS operators can now get this information without calling another operator. ) (SWB)-Switchboard , i l luminated key . I bel ieve this key is used to reach a cord-board posit ion , although I have no evidence of this . ( OGT j-Outgo i ng Tru n k , i l l um i nated key . Depressed by the TSO to select an outgoing trunk to be used to place operator assisted cal ls , special purpose cal ls (such as Inward ) , etc .

To the right of this row of keys you wi l l find the group labeled "Ring" . These keys are ut i l ized by TSPS to act ivate special purpose ring features and l i ne hand l ing . ( BAK)-Ring Back , i l luminated key . Used by the TSO to ring the originating party's l ine whi le holding the forward l ine in the event that the originating party loses his connection . ( FWD)-Ring Forward , i l luminated Key. Exactly the opposi te of ring back . ( CAL BAK)-Cal l Back , i l luminated key . Used in special operator cal l back si tuations on person­to-person cal ls where the cal led party is not avai lable but a message is left anyway. I real ly don't understand its fu l l potential and most posit ions I have spoken with don't ei ther. (T&c)-Time and Charges , i l luminated key. ( NIy)-lamp . Used in Non-ACTS (Automatic Coin Tol l Service) orig inated cal ls and l ights to inform the TSPS to notify cal ler of expi ration of init ial n m inute period (n being number of minutes entered via the KP N FY key at the or ig ination of the cal l ) . (Chg Due)-Iamp . L ights t o inform the TSO that more money is needed at the completion of a TSO assisted coin cal l . The usual procedure is to ring the coin stat ion back and attempt to frighten the customer into making the proper deposit ( " I f you don't pay we' l l b i l l the cal led party . . . . " ) . (Kly Clg)�Key Cal l ing , lamp . This lamp i s used by TSPS to determine the status of an incoming "Operator Number Identif ication" (ONI) marked caller or an incoming cal ler that was routed to TSPS due to an "AN I (Automatic Number I den t i f i cat i o n ) Fa i l u re" (AN I F ) Both ca l l condi t ions show up as a "0+" cal l (hotel , non­coin , coin-see above ) . If the cal l ing party is

(continued on next page) 2600 June, 1 981 Page 1 5

marked as "ON I Requ i red" the appropriate "0+" lamp w i l l l i ght , and the "Key Cal l ing" lamp w i l l be l i t steady . If the i ncoming cal l was due to an A N I F , the "0+" lamp w i l l be l i t , and the "Key Cal l ing" lamp w i l l be l i t and f lash ing .

D i rectly to the right of the "Ring" group of keys you w i l l f ind the "HII ... " set of keys . These two i l lum inated keys al low the TSO to selectively release (d isconnect from ) ei ther the cal l i ng , or cal led part ies by pressing ei ther the "Release Back" ( BAK) , or "Release Forward" (FWD) key respectively .

To the r ight of the release set , you w i l l see a g roup of four keys with no part icu lar "group designat ion " . These again are various mult i ­purpose keys that do the fol lowing : ( S H ) - S e r v i c e ( a s s i s t a n c e ) R e q u i re d , i l luminated key . Pressed by the TSO to forward the cal l ing party to a superv isory console ( i . e . i rate customers demanding superv isor) . I t can also be used if the TSO is confused and needs assistance . (MB)-Make Busy , i l l uminated key . Used to "busy out" the conso le , l ights when pressed . The console w i l l not take any incoming cal ls unt i l it is pressed again . (This is usefu l when gabb ing , doing nai ls , or f i l l ing out t ime/trouble t ickets . ) ( Mt)-Maintenance , lamp. This lamp i l luminates to wam the TSO that her conso le has been p laced i n t o remote m a i n tenance / test i ng m o d e . A f lash ing MTNC lamp indicates a fau l ty console . ( PT)-Posit ion Transfer, i l lum inated key . A TSO depresses th is key to transfer the cal l in progress from her console (posit ion ) to another console .

Below the "Outgoing Trunk" keygroup , you w i l l see a lamp marked "Cw"-Cal l Wait ing . Th is lamp l ights on every act ive console to i nform the TSO that there are incoming cal ls wai t ing .

T o the far right o f the "Cw" lamp , you w i l l f i nd the AMA group of keys , broken into two sub­groups , which are "Station" and "Penon" . A comp lete description of each key in this group wou ld require more room than is avai lable here . Basical ly these keys are used in conjunction with the "KP" and "AM A Timing" groups of keys (see below ) , for attaching the appropriate class of charge to the cal l being orig inated . The keys in the "Stat ion" sub-class from left to r ight are "Paid" ( PA ) , which is used to attach a "Station-

Page 1 6 June, 1987 26()()

A GUIDE t o - S t a t i o n " o r i g i n a t i n g c a l l e r p a i d c l ass of charge, "Co l lect" (CL) to attach "Stat ion-to­Stat ion" Col lect Cal l , "Special Cal l ing" (SP CG ) , and "Specia l Cal led" (SP CD) which are both used i n " S p e c i a l " S t a t i o n - t o - S t a t i o n b i l l i n g procedures , such as th i rd party, or cred it card cal ls . "Auto Col lect" (AT CT) , used in coin b i l l ing procedures and "D irect D istance D ia l ing" ( O D D ) , attaches a D O D c lass o f charge in cases where you have trouble d ia l ing a number and requ i re operator assistance in completing a cal l . Below th is row of keys you w i l l f ind the "Person" sub­g roup of AMA keys . Thei r uses are identical to those in the "Station-to-Station" group only they attach a "Person-ta-Person" rate of charge . The "No AMA" key is pressed to e l iminate a charge for a person-to-person cal l where the cal led party is unavai lab le . A lthough a l l the keys in this group can take on d ifferent meanings under d i fferent cond it ions, the above def i n it ions are su i table for the sake of this art ic le. A l l keys in this group are i l l uminated keys .

Below the "Cw" lamp you w i l l f ind two keys under the head ing "Coin 2" . Their uses on "coin orig inated" ( payphone) cal ls are : "Coin Col lect" (COL)-which causes the payphone to co l lect coins , and the "Coin Retum" ( HET) , which causes it to retum a coin . Both are i l luminated keys .

To the r ight of the "Co in 2" group, you w i l l f ind the "AMA Timing" group . These keys are used in conjunct ion wi th the "AMA" , and "KP" groups for: ( CA TMG )-Cancel T iming , i l l um inated key . Cancels AMA t iming charges and also al lows the TSO to change the class of charge on a cal l . (ST TMG )-Start Timing , i l l uminated key . U sed to start AMA t iming after the appropriate class of charge has been entered , and the cal l ing party has reached the cal led party in person-to-person ca l ls (or in stat ion-to-station D O D cal ls , when the destination ring has been establ ished ) . ( CA CAL)-Cancel Cal l , i l luminated key . Used i n conjunction w i th the Cancel Timing key t o Cancel a cal l and mark a "non-completed" cal l on the AMA tapes (such as a person-to-person cal l where the cal led party i s not avai lable) . ( H E C M S G ) - R e c o r d ( A M A ) M e s s a g e , i l l u m i nated key . U sed a t the comp l e t i o n (mean ing ca l l ing and cal led party are done

TO TSPS ta lking ) , to record the t ime of the cal l and the appropriate class of charge onto the AMA tapes and to release their forward connection .

To the right of the AMA timing group you wi l l see three columns of four buttons under the head ing of "Loop Control" . These al low the TSO to access any of the three loops avai lable to her for p lacing cal ls . The keys have identical mean ing in each set . They are used in the fol lowing manner: (ClG)-Cal i ing Party, lamp. Lights to signify person on said loop is a cal l ing party . ( ClD )-Cal led Party , lamp. Lights to signify that person on loop is a cal led party . (HlD )-Hold, i l luminated key . Places a loop into a hold state . The cal l ing and cal led party can talk to each other, and AMA timing can be started . The cal l is held at the console. (ACS)-Access , i l luminated key . Used by the TSO to in it ia l ly access a loop . Pressing this key selects an outgoing loop , and readies the conso le for p lacing a cal l onto i t . It is also used to al low the TSO back into a loop or loops in a hold state .

To the right of the loop contro l group you wi l l see the "Keypull8 Key" group . These keys are pressed by the TSO to init ial ize the keypad parser into the proper mode for entering informat ion , which is completed/entered by pressing the ST key ( to the right of keypad) . Their uses are as fol lows : (KP TB)-KP Trouble, i l l uminated key . Used to enter various TSO-encountered trouble codes such as noisy l ine, customer(s) were cut off , cou ldn't complete cal l , etc . I bel ieve the format for entering a trouble code is as fol lows : "KP TBL + TC + NTE + CN + S1" where KP TBL is the KP Trouble Key , TC is the 2 D ig i t trouble code, NTE is the number of t imes trouble was encountered (1 D ig it ) , CN is the cal ler's phone number, and ST is the start key . A record of the trouble is made on the AMA tapes and the cal l ing party is usua l ly g iven credit . (KP RT)-KP Rate , i l l uminated key . Used to enter and disp lay rate (charge) informat ion . Can also be used to disp lay rate information at a customer request . ( KP HO)-KP Hotel , i l luminated key . Used for manual ly entering a verbal ly requested room number on hotel/motel originated cal ls . (KP NY)-KP Notify, i l luminated key . Used for

(continued)

enter ing t ime i n m i nu tes on a non-ACTS originated Coin cal l . When entered time durat ion is up, i t causes the NFY lamp (see above) to f lash . (KP SP)-KP Special , i l luminated key . Used for entering special numbers such as credit card l O 's and third party b i l l ing numbers . It causes TSPS software to automatical ly query the BVA (B i l l ing Val idation) database to check the val id i ty of the number or credit card and w i l l f lash if b i l l ing to an i l legal card or number is attempted . (KP BK)-KP Back , i l luminated key. Used in entering the cal l ing number in ANI fai lures ( A N I F ) , a n d O N I ( O p e r a t o r N u m b e r Identif ication) required situat ions . (KP FD )-KP Forward , i l luminated key . This is the most common ly used KP key . I t 's used to enter the cal led party's number on all TSO­assisted cal ls . Pressing the ST (start) key causes the entered number to be app l ied onto the accessed trunks in MF tones . (ST)-Start , i l l uminated key (found to the right of the keypad ) . U sed in comp l et i ng a l l KP+number sequences l isted above.

Below the "Coin 2" set of keys you w i l l see the (POS RlS)-Posit ion Release key . This key is used by the TSO to release her pOSit ion from the cal l . She would hit POS RLS after complet ing a cal l , and also to release a person cal l ing to ask her questions and not actual ly requesting that J cal l be placed (name/place requests, etc . )

Below the Posit ion Release key you w i l l see a set of 5 keys labeled "Display Control" . These keys are used to make the console display show assorted information . Thei r use is as fol lows: (tlm)-Time, unl ighted key . D isplays t ime of day in m i l i tary format . (chg min)-Charge per M inute, unl ighted key. Displays the charge per m inute on a cal l in progress. (ClG NUM)-Cal l ing Number, i l l uminated key. Displays the number of the cal l ing party . (ClD NUM)-Cal led Number, i l luminated key. Displays the number of the cal led party. (SPl NUM )-Special Number, i l luminated key . D isplays various special numbers such as Cal l i ng Card numbers and third party bi l ied numbers . Use

(continued on page 20)

2600 June, 1 987 Page 1 7

letters (continued from page 13)

P rotection Eq uip m e n t," a n d cost around $ 1 0 or $20.

M a n y fi r m s and i n divid u als who contract with Uncle to put together these repo rts later r e - package the information so they can sell it on their o w n . T h i s is e s p e ci a l l y t r u e o f companies within 75 miles or so of Washington, DC.

U n cle is a wo n d e rf u l so u rce of i n f o r m at i o n . M a n y a g e n c i e s a n d departments of the government will happily send to anyone who asks for a list of publications which they have published. The complete catalog is the GPO Monthly Catalog, put out by the Gover n m e n t Printing office. This catalog is also available as a database on several of the leading database services. You can do a search in a minute or two that will save you tons of t i m e , a n d i t ' s o n e of t h e m o s t reasonably-priced databases around­only $35 per hou r.

A utovon Info Dear 2600:

The librarian

There seems to be a passing fancy with Autovon in you r "letters" column. The rumours and d isinformation that you have pr i nted in the past have been amusing, but maybe it's time for a few straight facts.

The AUTOmated VOice Network was conceived by DoD in the early sixties to e l i m i n at e the high c o s t of the redu ndant networks that each of the a r m e d se rvices was ope rat i ng. I n addition to providing a uniform dial ing plan for DoD installations worldwide, Autovon allows off-net calls to other ( "com m e rcial " ) pho n e n u mbe rs. By calling the local Autovon switchboard, you can also place an off-net to off- net call, but you will need a special 8 character a u tho rization code (these change quarterly).

From an Autovon-capable line you

Page 18 June, 1987 2600

may place "Routine" precedence calls. But since all the Washi ngton desk­bou nd paper pushers clog the network with t h e i r e n d l e s s j ab b e r i n g , a "Routine" call frequently gets blocked . A very select few Autovon lines ( "4-wire" ) or the Autovon operator can se lect a h igher precedence by pressi ng one of the keys in the fou rth colum n of the touch-tone pad. This is done by dial i ng the preced e nce befo re the n u m b e r : D f o r " P r i o r i t y " , C f o r " Immediate", B for "Flash " and A for "Flash Override". Autovon operators don 't object to giving you a "Priority" or "Im m ediate " t r u nk , b u t ask i ng for anything higher will require special keywords and brass balls. If you dial one of these precedence keys on a normal ("Routine") Autovon line you 'll get a recorded annou ncement from the Autovon switch telling you that the p r e c e d e n c e y o u s e l e c t e d is n o t available o n the li n e yo u ' re u s i ng. W h e n y o u call a n o t h e r A u t o v o n switchboard using "Priority" or higher precedence you hear a "Prior ity r i ng , " which is a 3 to 4 second ring followed by a one second pause. This usually succeeds in getting Emma's attention at the d istant switchboard.

T h e A u t o v o n - t o - c o m m e r c i a I translations you 've printed in the past would be more interesting if you added t h e FTS translat i o n , too. A colla­boration among you r readers might result in a compend i u m that would be a handy desk reference for m il itary and federal employees.

Rusty Diode It 's a lwa ys time for this kin d of information in these pages. Let's hear some A uto von stories-experiences and problems people have had with the system!

Visions of Doom Dear 2600:

I live in Pasadena, a few miles from

(continued on page 22)

Z600 marketplace BEST HACKER AN D PH R EAKER written p u b l ic dom a i n softwa re for the Apple I I fa m i ly . Two double s ided d iskettes fu l l of com m u n icat ion and deprotect ion u t i l i t ies. These programs were com bed from the best BBS a nd c l u bs nat ionwide. Send $ 1 0 cash, check, or MO to M a rk B. , 1 486 M u rphy R d . , Wi l m i ngton, OH 45 1 77-9338. WANTE D : Tech n ica l data for pay phones, dot m a t r i x p r i n t e r s , a n d / o r m o d e m s . Lo o k i n g f o r s c h e m a t i c s a n d t h e o r y of

operat i o n . Ca l l (205) 293-6333/6395, 7 to 4 CST. Ask for Airman Paroche l ls . Can not accept co l l ect ca l ls .

TAP BACK I S S U ES-complete co l l ect ion, vo l . 1 - 84 plus s u pp lementa l reports and schemat ics . Approx. 400 pages of q u a l ity cop ies sent via UPS or U S M a i l . $ 1 00 i n c l u des del ivery. Send cash, check or MO (payable to PEl ) . Cash sent same day, others

a l low 4 weeks, to Pete G., Post Office Box 463, Mt. La ure l , NJ 08054. DOC U M E N TATION on e lectron ic & d ig ita l PBX's a nd sw itc h i ng systems. W i l l ing to t r a d e / p u r c h a s e . A l s o l o o k i n g f o r B e l l S y s t e m P r a c t i c e s a n d o t h e r s u c h parapherna l i a . Write to B i l l , c/o 2600, PO Box 752B, M iddle Is land, NY 1 1 953. 32K M O D E L 1 00, U 1 - Rom I I , dr ive, TS ­D O S , s p r e a d s h e e t , m o d e m c a b l e s , AC a d a p t o r s , b r i e f c a s e i n c l u d e d , g o o d c o n d i t i o n , $ 1 200. N ew, m a ke a n offe r . Tandy 2000 vers ion of WordPerfect 4 .0 $1 50 or t rade for 1 200 or 2400 ba ud exte r n a l modem . I B M PC & XT & AT vers ion of WordPerfect 4. 1 and MathPlan 2 . 1 . $ 2 50 or trade for 1 200 or 2400 baud externa l m odem . Ca l l (803) 244-6429 or (803) 233-5753. Ask for Pa u l . WANTE D : Look i n g for a good used 5 or 1 0 mega byte hard dr ive for the App le I I series

of computers . If you a re sel l i ng one or know of a nyone that is then send rep l ies to : B r i a n F . , 1 003 W. M a i n , Apt . 3, Ottawa , IL 6 1 350. T A I WA N ! A l l T a i w a n c o m p u t e r s a n d accessories ava i lab le for d i rect sh ipment for cost p l us sh ipp ing plus 3% (q uant i t ies of 50 or more) . G i les, PO Box 1 2566, E I Paso,

TX 799 1 3 .

2400 BAU D M O D E M S . I ntern a l , for PC 's a nd clones. $ 200. 5 1 6-75 1 -2600, Randy. I N E ED I N FO on a power supply made for Western E lect r i c by ACM E E lectr ic Corp. i n 1 9 7 1 . I t i s d e s i g n a t e d : R e c t i f i e r Sem iconductor Type-J87233A-2 LI . I nput is 2081 24Ov, output 48v/30a u s i ng SCR's as control e lements. Any i nfo wou l d be a p p r e c i a t e d . A s c h e m a t i c w o u l d be wonderfu l . I ' l l be g l ad to re i m b u rse copying costs. J . Kle in , 1 2330 Tak i l m a Rd. , Cave J u n ct ion, OR 97523. FOR S A L E : Tex a s I n s t r u m e n t "Afe i s ­perur iter" ( S i lent 7 00 series) inte l l igent data t e r m i n a l . M a n y u s e s . R e a s o n a b l e . Contact Ted K . , P O Box 533, Auburn, NY 1 302 1 -0533. SCHEMATICS-BUY, S E LL, TRADE . We are interested i n e n l a r g i n g o u r col lect ion of c i rc u i t d iagrams for i nterest ing e lectro n i c devices. Send l ist of w h a t y o u want/have a nd a SASE to : J . R . " Bob" Dobbs, PO Box 444, Shawnee M ission, KS 66202. P R I VATE I N V E S T I GATO R B e n H a r ro l l wou l d l i ke to hear from other P . I . 's and/or ANY other "spooks" i . e . N . S A , C . I .A . , F . B . I . , etc . for pu rposes o f excha nges i n ideas, tech n i q u es, sou rces, and eq u i pment. ( 6 1 9) 239-699 1 . 425 " F " S t . , S a n D i ego, CA 92 1 0 1 TAP BAC K I S S U E S . Repri nts of complete c o l l e c t i o n . O u a l i t y c o p i e s . D e l i v e r y i n c l u d e d . S e n d c a s h , c h eq u e , o r M O ( Payable t o IPS) . $60. John L . , P . O . Box 722, Stat ion A. Downsview, Ontar io M3M 3A9. 2600 M E ETI N G S . F r idays at 5 pm at the C i t icorp Center i n the Atr i u m- 1 53 East 53rd Street, N ew York C ity. Come by, drop off a r t i c l e s , a s k q u e st i o n s . W e ' l l be i n P h i lade l p h i a o n J u ly 3 1 . Check J u ly issue

for exact locat ion or ca l l 5 1 6-75 1 -2600

after J u ly 1 . G OT SOM ETH I N G TO SELL? Looking for somet h i ng to buy? Or trade? Th i s is the p l a ce ! The 2600 M a rketplace i s free to subscr i bers! J u st send us whatever you want to say (w ithout m a k i n g it too long) and we ' l l p r i n t i t ! O n l y p e o p l e p l e a s e , no

busi nesses ! Dead l ine for J u ly issue: 7/5/87.

2600 June, 1987 Page 19

TSPS (cominued/rom paKe 1 7)

of th is key in d isplaying Cal l ing Card numbers is as fol lows : Press i t once and you get the f i rst 1 0 d ig i ts of a 1 6 d ig i t Cal l ing Card . Press i t a second t ime and you get the second 6 dig i ts of the Ca l l ing Card . Press i t aga in and it darkens the d isplay .

That's i t f o r t h e keys on t h e conso le . On the left hand side of the d iagram you w i l l see the "Multi Leal Bulletin Tray" . Th is is an a l l -purpose h o l der f o r i n f o rmat i o n l eaf l e t s t h a t c o n ta i n i nformat ion o n spec ial numbers , Rate and Route informat ion , spec ial non-standard ass istance ro utes , and v a r i o u s o t h e r T S P S - re l ated informat ion . At the lower r ight hand side of the conso le is the "Number Plale" . This is simply the conso le's Pos i t ion number and I D number. It is a stamped metal p late. I haven ' t f igured out any way to abuse it yet , other than scaring a TSO by knowing of i ts existence . (Special thanks to Bill from RNOC, Phucked A gent 04, and The (602) Scorpion for their help in acquiring and compiling this infonnation . )

I 'elecom Informer

in consta nt 1 985 dollars. A market research firm predicts that

the "interactive voice " i ndustry will grow explosively over the next five years to more than $4 b illion. Interactive voice i ncludes voice messaging, 976 dial-it services, "talki ng yellow pages, " voice response, and audiotext -all the services and equipment that permit people to i nteract with computers and communications networks through a tone� ial telephone, according to Link Resources Corp . The company says that the i nteractive voice services market, $440 million in 1 985, is expected to grow by a factor of more than 5, to $2 .3 b illion bv 1 99 1 . The 1 985 market for i nteracti�e voice equipment, $525 . 3 million. i s expected to grow to $ 1 . 8 bill ion by 1 99 1 . "If government regulations permit the telephone companies to enter these markets, you c a n count on a value far in excess of $4 billion, " accord i ng to director of research serv ices Dr . C . W illiam Reed .

Pal!e 20 J une, 1 987 2600

.. -t il riKh t , so I made a mistake. I I TllOuKht !(Jr sure the r (J know how to use telephones hy ' I t l W .' "

(continued/rom paKe 8)

Cel-Tel to the Rescue Kurt Voss , a Milwaukee i nsurance

age n t , had his cellular-equipped 1 98 I Olds Toronado stolen from a service station pa rki ng lot . Voss called his own car phone , and the person who stole his car answered the phone, accordi ng to an art icle i n the Milwaukee Journal. Voss told the newspaper that he was so shocked that the youth had answered the phone that he "just flew off the handle . " Through his cellular carrier , Voss obta i ned a number t hat had been called six times from his car. In that way he was able to get the culprit's home address . "I was so upset and angry at my car bei ng stolen that , at whatever expense. I wanted to catch the guy, " he sa id .

•

pag i ng local voice-paging channel on my scanner, I f igured that anybody could just cal l any one of those phone numbers and get their message on the air . So after cal l ing some numbers above and below my friend's voice pager number I found that this was true-I heard myself on the scanner. Problem was , you had to l isten to everyone else's messages, too . Some kind of selective tone decoder for the scanner was in order-the cheaper the better. A lso , some kind of tone-encod i ng system was needed that anyone had access to , so why not use touch tones? After some experimenting , I found that a touch tone decoder chip with two 2N2222 transistors and a few resistors and capacitors (about $1 0 total at Radio Shack) cou ld be used to decode the * (or any other) touch tone from the scanner's audio section and switch the audio on to the speaker. I t all fit quite n icely into a matchbox-sizeckontainer taped to the back of my portable scanner, and cou ld be powered by the scanner batteries .

Now, when anyone cal led any of the paging system phone numbers and preceded their voice message with the * touch tone , the scanner speaker wou ld sound off and al low me to hear i t . At least a fu l l second of tone was needed to unlock the decoder ch ip . Whoever was assigned that pager number would also hear the * tone and the message, so it wasn't ent i rely private, but i t was free and you could take a "free ride" on any of the several hundred pager phone numbers to help avoid detection . The scheme worked quite wel l for over a year and it never was found out. Those pag ing me had to be carefu l not to g ive out their regular phone numbers or exact locations over the air, so a simple code was devised to a l low a "modi f ied" phone number to be broadcast without giving the intended one away.

If you already own a portable scanner, you a l ready have most of a vo i ce-pager . A programmable unit is needed to f ind the proper

(continued from page 5)

radio-paging frequency, but once you know i t , a less expensive crystal unit can be used . The pag ing system phone numbers can be found by dia l ing numbers above and below a known pager number (ask somebody who has one or cal l the pag ing company and tel l them you forgot yours ) . A schematic for the tone-decoder ch ip circuit i s included i f you buy i t a t Radio Shack, but the hook-up to your scanner's audio section depends on your model . You can usua l ly get a schematic for your scanner by writ ing the manufacturer, and a friend ly hardware hacker can help you with the hook-up deta i l s if you ' re no t e l ect ron i ca l l y inc l ined . I f you can bear l i sten ing t o a l l the other paging traff ic whi le wait ing for your messages, you can skip the modi f ication altogether and just tune in .

Scanner World in A lbany, NY probably has the lowest scanner prices around . They sel l a crystal­contro l led , pocket size , single-channel receiver that's ideal for this appl ication for only $39. Be sure to spec i fy the r i gh t f requency before ordering i t , though . S ince you' l l want to leave your un it turned on most of the t ime, it 's cheaper to use rechargeable N i -Gd batteries . One could get fancy and add a 555 t imer Ie to the c ircu it which would automat ical ly t ime-out and shut the audio off after the message is over, but turning the scanner off and back on again wi I I reset i t just the same. Some mobi le scanners have enough room in them to mount the extra c i rcuitry right inside , but portables are too tight a squeeze.

You probably don't need to be reminded that theft of telecommunications services is a crime, and that ca l l i ng the same pager number repeatedly (not very smart , and unnecessary anyway) could be considered harrassment . But if one is reasonab l y carefu l about what i s broadcast , changes the pager number frequently, and places cal ls from payphones when possible, the chances of being found are almost zero .

Another 2600 Public Get-Together Friday, July 31 , 1987

5:00 P.M. IN PHILADELPHIA

(exact location will be announced in our July issue) 2600 June, 1987 Page 21

letters L .A . , and have been having trouble w i t h t h e l o c a l 8 1 8 - 3 5 0 - 1 0 28 fv1 e t r ophone port. They have just upgraded to better software making it almost impossible to hack the system. I have heard that U .S. Sprint has bought the company and they're going through serious changes that may affect us all. Rumours are that prefixes will be added to the codes and maybe more than that. I also have found some weird codes that give carriers, call unknown homes/businesses and the Metro operator. If you or anyone cou Id explain what is happening or list some local ports I would be very thankful.

Hex Converter First of all, G TE Sprint bought u. s. Tel and thus, changed their name to U. S. Sprint. A s far as we know, they're not in t e r e s t e d in a c q u ir ing We s t e rn Union's Metrophone service. Second every independent carrier has gone through a phase of making their authorization codes a little harder to guess. Metrophone is simply one of the last to finally get around to it. It doesn 't mean the end of the world by any stretch of the imagination. And finally, almost all long distance companies have "weird" codes that hook you up to special numbers. In most cases, it 's either an internal office at the company itself or a special "toll free " service provided to the people whose phone you win d up ringing. Simp ly ask customer service what kind of "toll fr e e " s e r v i c e t h e y p r o v i d e t o understand it better.

Words of Praise

Dear 2600: I received the March issue of 2600

and was delighted by the poem about Captain Crunch. In fact, I would like to see a "bio" piece done on him, similar to the one done recently on TAP.

Let me also say that I support a magazine like 2600 because it allows

" age 22 June. 1987 2600

(continued/rom paKe 18)

people to decide for themselves how they wil l interact with the world 's expanding electronic networks. I work for a large cable company, and can say that the whole issue of scrambling is repugnant. The networks earn plenty of money from subscribers' fees and the reason scrambling was initiated was purely money- oriented-it had nothing to do w i t h the Captain M idnight affair. Our system uses Videocipher II hardware, which I have heard has been breached in the Caribbean and illegal decoders are currently being manufactured there. Our management knows this, and despite th is i t i s buying m o r e descramblers to complete its set-up, since all the major services will be scrambled by the end of next year (at least in theory). It should surprise no one, then, if these devices begin to be distributed in the United States-all that is needed is a clever legal euphemism (just as infinity trans­mitters quickly became "Electronic Babysitters " when the surveillance laws became stricter). I am not in a highly technical position, but should any interesting data appear I will send it in.

BBQ

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