HDTenEightyP/NetNews huggingface dataset:
Date: Tue, 8 Sep 1992 13:44:05 GMT
From: cc_paul@rcvie.co.at (Wolf Paul)
Newsgroups: comp.dcom.telecom
Subject: Re: Ending Automated Calls
Reply-To: cc_paul@rcvie.co.at (Wolf N. Paul)
Organization: Alcatel Austria - Elin Research Center, Vienna
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 696, Message 8 of 12

In article <telecom12.689.4@eecs.nwu.edu> reilly@staff.dccs.upenn.edu
(G. Brendan Reilly) writes:

> It seems that if you wanted to end automated calls you would simply
> have to get the exchange of the cellular phone in Washington DC and
> start bombarding them with automated calls.  I'm sure that when the
> congressional staffers and such have to put up with this crap they'll
> decide "something must be done in the public interest."

Except that I wouldn't trust the congressional staffers to get it
right, whatever they decide to do in the "public interest".

They might just decide that ANY calls initiated by a machine should be
illegal -- bye-bye dial-up UUCP, SLIP, PPP, FIDO, etc., not to mention
auto-redialling FAX machines or network FAX servers ...


Regards,


Wolf N. Paul, Computer Center    wnp@rcvie.co.at
Alcatel-Elin Research Center     +43-1-391621-122 (w)
Ruthnergasse 1-7                 +43-1-391452 (fax)
ELIN RESEARCH    A-1210 Vienna-Austria/Europe    +43-1-2246913 (h)
Date: Mon, 7 Sep 1992 03:11:02 GMT
From: kingpin@world.std.com (Joe Smooth)
Newsgroups: comp.dcom.telecom
Subject: Spirit Phones
Organization: The World
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 688, Message 2 of 13

Is there anyway to rewire Spirit phones so that they can work on
normal ring and tip wires? I heard there was someway to build some
kind of interface which can keep the functions intact, too. Anyone
heard of this?
Date: Sun, 13 Sep 1992 15:14:22 GMT
From: jon_sree@world.std.com (Jon Sreekanth)
Newsgroups: comp.dcom.telecom
Subject: Re: Information Wanted on CPC Pulses
Organization: The World
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 706, Message 4 of 13

In article <telecom12.697.10@eecs.nwu.edu> stevef@wrq.com (Steve
Forrette) writes:

> retry the connection, you get a busy signal.  It would be nice to have
> the modem immediately reset when it sees the CPC indicating that the
> caller has gone away.  I've never seen this in any modem (not that
> I've looked very hard), and wonder why it is not a standard feature.
> It would seem to me that detecting loss of loop current would not be
> an expensive feature to engineer.  And if a line doesn't give CPC,
> then the modem would act as it does now anyway.

The Brooktrout multichannel fax/modem/voice cards (TR112, TR114) do
sense loop current, to the best of my recollection. On the other hand,
they pay lots of attention to their DAA design since they make various
country versions, and have DID front end versions. An $80 PC modem
probably cuts out the loop current sense opto for cost saving.

On this topic, if a modem actually did loop current detection, how
would it report it using the "Hayes" (AT) command set ? Would the
manufacturer pick a status code at random, like "DC ON", or is there
some organization that co-ordinates extensions to the AT command set ?


Jon Sreekanth
Assabet Valley Microsystems, Inc.      Fax and PC products
5 Walden St #3, Cambridge, MA 02140    (617) 876-8019
jon_sree@world.std.com
Date: 7 Sep 92 02:28:08 GMT
From: wah@zach.fit.edu ( Bill Huttig)
Newsgroups: comp.dcom.telecom
Subject: Strange MCI Problem
Organization: Florida Institute of Technology, Melbourne USA
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 688, Message 9 of 13

I had a strange thing happen to me tonight. I called my aunt and
after dialing heard nothing; no ringing or noise at all, so I tried
several more times. At first I thought it might be that the speed
dial lost the end of the number so I dialed it (well actually pushed)
the number manually ... still no luck

After several tries I did get through. It turned out that she has been
picking up and saying 'hello' I never heard her. I later tried to call
my other line via MCI and the same thing happened.

Is this what can happen with a SS7 problem? The ringing through but no
voice path getting opened?

Is MCI connecting their SS7's to the LEC's yet?


Bill
Date: Sun, 13 Sep 92 05:50:02 EDT
From: morpheus@entropy.mcds.com (morpheus)
Newsgroups: comp.dcom.telecom
Subject: Re: Information Wanted on CPC Pulses
Organization: TELECOM Digest
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 706, Message 11 of 13

stevef@wrq.com (Steve Forrette) writes:

> Here's a question of my own: Are there any modems that detect the CPC
> signal?  A common problem with our Hayes Ultra 9600's that we have for
> dialup are that if the 9600 bps negotiation fails for some reason such
> that "NO CARRIER" is returned instead of a fallback to 2400, the modem
> at the host end is apparently still trying to negotiate, and remains
> offhook for another 30-45 seconds.  This means that if you immediately
> retry the connection, you get a busy signal.  It would be nice to have
> the modem immediately reset when it sees the CPC indicating that the
> caller has gone away.  I've never seen this in any modem (not that
> I've looked very hard), and wonder why it is not a standard feature.
> It would seem to me that detecting loss of loop current would not be
> an expensive feature to engineer.  And if a line doesn't give CPC,
> then the modem would act as it does now anyway.

I *believe* US Robotics modems do this.  My Dual Standard (sup v 3.0)
seems to.  If I call the modem and wait until it picks up before
hanging up the telephone, the modem instantly reports "NO CARRIER".

All in all, I must say I have found the US Robotics modems to be of
very high quality.  Things like touch-tone decoding and MI/MIC appeal
to the hacker in me ;-) (now just if it did A/A1 closure!).

No, I don't work for 'em.


morpheus@entropy.mcds.com  /\/\/\/  morpheus@f208.n2606.z1.fidonet.org
Date: Tue,  8 Sep 92 11:57:32 EDT
From: gls@windmill.att.com (George L Sicherman)
Newsgroups: comp.dcom.telecom
Subject: Re: Standardized Exchange Names
Organization: AT&T
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 696, Message 1 of 12

In <telecom12.661.9@eecs.nwu.edu>, leonard@qiclab.scn.rain.com writes:

> I think "FAirfax may be a "standard" name of some sort, as the 32x
> exchanges in Spokane used that in the 60's.

The generic name for 32 in Buffalo was FAirview.  Buffalo had some
special names like DElaware and HUmboldt, but "Fairview" had no
special meaning there.  If there's enough interest, I'll post the
whole list. 


Col. G. L. Sicherman gls@windmill.att.COM
Date: Sat, 12 Sep 92 07:58 EDT
From: rsiatl!turner@rsiatl.UUCP
Newsgroups: comp.dcom.telecom
Subject: Re: How Can I Splice Telephone Wires Without an Overkill?
Organization: TELECOM Digest
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 701, Message 7 of 10

> While I have no idea what method was used to splice each
> pair of wires...

Usually Scotchlock UR's are used around here.  Contel used to use
UY's, but now SCB, old Contel, and GTE all use URs. Scotchlocks are
petroleum jelly filled plastic connectors that will splice several
wires to together, three in the case of UR's.  Two connectors are used
per pair.  AT&T and others, including 3M, make connectors that will
splice the whole pair, but they don't see much use in the SE US.

I have seen Scotchlocks in Rat Shack's catalog if you want to buy a
few at some exorbitant price.  Digi-Key carries them as well.  While a
special tool is nice for crimping them, slip-joint plires or Channel
Locks work quite well.

Buried and aeral splices are sealed in an enclosure.  Ground level
splices are just left in the ped, as the jelly protects them from
moisture.


Pat Turner KB4GRZ   turner@dixie.com
Date: Tue, 15 Sep 92 00:00:15 PDT
From: questor!sp@ucbvax.Berkeley.EDU (Steve Pershing)
Newsgroups: comp.dcom.telecom
Subject: Need Recommendsation For Cellular: Portable/Car/Hands-Free
Organization: Questor|Free Usenet News|Vancouver, BC: +1 604 681 0670
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 713, Message 12 of 16

I am posting this for a friend without net access.  He is looking for
a decent small portable cellular phone which he could also use
hands-free in his car.

On-air transmit time while in his pocket (or on his belt) is
relatively unimportant.  An hour or so would do.  Cost, size and ease
of use in carrying it and taking itin and out of his vehicle are the
more important points.

Any suggestions as to the merits of various units on the market would
be very much appreciated.

Also, where would one look in order to get a good used unit at a low
price?

Thanks in advance for any help.


        Steve Pershing, System Administrator, The QUESTOR Project
  FREE access to Environ, Sci, Med, & AIDS news, and more.  [also UUCP]
        on a ZyXEL-1496S v.42bis, v.32bis, v.33, up to 16,800bps.
    POST: 1027 Davie St., Box 486, Vancouver, B.C., Canada  V6E 4L2
    Fones: (+1 604)  Data: 681-0670  FAX: 682-6160  Voice: 682-6659


[Moderator's Note: I'd be careful about buying used cellular phones.
Like used cars, you are buying someone else's problems often as not.  PAT]
Date: Wed, 9 Sep 1992 04:58:54 GMT
From: GeraldR@sunfish.ratsys.com (Gerald Ruderman)
Newsgroups: comp.dcom.telecom
Subject: Re: Latest Cuba -- US Telephone Situation
Organization: Rational Systems, Inc.
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 698, Message 4 of 12

In article <telecom12.686.2@eecs.nwu.edu> George S Thurman
<0004056081@mcimail.com> writes:

> It was, in fact, so popular that by 1966, AT&T had to do something
> about the gigantic unpaid settlements for years of calls made out of
> Cuba to the whole world -- on AT&T's tab with all the world's other
> communications entities.  The balance owing AT&T was enormous, and
> Castro had no intention of paying.  Obviously, his huge unpaid balance
> was simply an item he felt was tit for tat.  It's easy to see how
> Castro (and certainly his Russian masters) must have enjoyed the dual
> economic "get-back" and embarrassment Florida City was causing the
> hated U.S. during the deeper years of the Cold War.

I recall reading a while ago that it used to be common for Cubans to
call the US collect and that quite a large amound of money accrued to
AT&T this way and that Castro (at least once upon a time) did not owe
ATT any money.  This article makes me think I remember this backwards.


Gerald Ruderman   geraldr@ratsys.com
From: andrew@frip.wv.tek.com (Andrew Klossner)
Newsgroups: comp.dcom.telecom
Subject: Re: Slamming Prevention
Date: 4 Sep 92 19:27:47 GMT
Reply-To: andrew@frip.wv.tek.com
Organization: Tektronix, Wilsonville, Oregon
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 684, Message 7 of 11

The local GTE (General Telephone of the Northwest) solicited
anti-slamming requests.  Each subscriber got a form that we could sign
and return to prevent a change in default LD carrier without written
instructions.  No charges were involved.

I suppose this could have been mandated by the state.  But, on the
whole, GTE residential service at (503-620) has been quite good to me.
I just built a new house and got outstanding cooperation and visits by
genuinely concerned service techs.  They each handed me their business
cards, complete with pager numbers, and asked me to call them
personally if the need arose.

It wasn't like this a few years ago when I had major problems at
(503-638), just a few miles away.  I wonder what changed ...


Andrew Klossner  (andrew@frip.wv.tek.com)
     (uunet!tektronix!frip.WV.TEK!andrew)
Date: Sun, 13 Sep 92 21:56:07 EDT
From: gls@windmill.att.com (George L Sicherman)
Newsgroups: comp.dcom.telecom
Subject: Re: Standardized Exchange Names
Organization: Save the Dodoes Foundation
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 706, Message 9 of 13

By request, here are the old exchange names from the Buffalo area.
The explanations are fallible ...

22	BAiley		Bailey Avenue
23	BEdford		Bedford Avenue
24	CIrcle		generic
25	CLeveland	president from Buffalo
26	AMherst		Amherst Street
27	BRidge		Grand Island Bridge
28	ATwater		generic
29	CYpress		generic

32	FAirview	generic
33	DElaware	Delaware Avenue
34	FIllmore	Fillmore Avenue
35	ELmwood		Elmwood Avenue
37	FRanklin	Franklin Street
38	EVergreen	generic
39	EXport		generic

42	GArfield	generic
43	IDlewood	generic
46	HObart		generic
47	GRant		Grant Street
48	HUmboldt	Humboldt Park

52	JAckson		generic
53	KEystone	generic
54	LIncoln		generic
58	LUdlow		generic

62	MAdison		generic
64	NIagara		Niagara Street
66	MOhawk		Mohawk Street
69	OXford		generic

72	PArkside	Parkside Avenue
73	REgent		generic
74	RIverside	Riverside Park
75	PLaza		generic
76	SOuth		South Park
77	SPring		generic
78	SUmmer		generic

82	TAylor		generic
84	VIctoria	generic
86	UNiversity	University of Buffalo
87	TRiangle	generic

92	WAshington	Washington Street
94	WIndsor		generic
96	WOodlawn	Woodlawn Avenue


Col. G. L. Sicherman    gls@windmill.att.COM
From: Charlie.Mingo@p4218.f70.n109.z1.fidonet.org (Charlie Mingo)
Newsgroups: comp.dcom.telecom
Subject: VOICE and BUSY Detection (Was V.25bis, or: Are CCITT)
Date: 12 Sep 92 22:40:48 GMT
Article-I.D.: eecs.telecom12.704.9
Organization: TELECOM Digest
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 704, Message 9 of 11

leonard@qiclab.scn.rain.com (Leonard Erickson)

> Actually, there's another problem. Take USR modem. Put X5 in the
> Initialize string. Now call a Telebit that puts the PEP tomes first.

> Result? The USR reports a result code of VOICE almost immediately and
> hangs up!

> This was true of a USR dual standard bought a couple of years ago. I
> don't know if it is still true.

   That sounds like a problem more with putting PEP tones first than
with the USR, which has a pretty average VOICE recognition.  I just
tried it with my USR d/s (Oct 90 - round LED), with VOICE recognition
activated, calling a Trailblazer+ (non-v.32) and got a 2400 connect.
  
> So even if a modem answer, it has to answer in a way that the
> *calling* modem recognizes.

> Then you get into situations like the one I saw mentioned recently.
> Supposedly, US modems think that Australian ring signals are busy
> signals!  (Anyone know the truth about this?)
 
   It's certainly true that (West) German and Italian ringing tones
can fool a US modem into mistaking them as BUSY.  Of course, those
ringing tones often fool human callers from the US too!  (They sound
like "Barrrrp Barrrrp.")  The real problem is the lack of standardized
ringing/busy tones.  (Also, the phone system in Rhein/Main Germany
often starts to give you a ringing signal, then switches to busy - the
BUSY signal sounds like a British police siren.)

   The easy solution to this is just to use feature set X1 when
calling exotic locales (or modems!).
Date: Mon, 7 Sep 1992 09:53:01 -0600
From: rickie@trickie.ualberta.ca (Richard Nash)
Newsgroups: comp.dcom.telecom
Subject: Clients, Cheats, Crooks
Organization: TELECOM Digest
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 694, Message 7 of 13

 From a recent item in {The Edmonton Sun} sometime in early August
that I had ripped out of the newspaper and had been carrying around in
my wallet for a month, page 6 "News";

    Clients, Cheats, Crooks.

[] Refreshing to see some blunt truth in advertising.  Private Lines
Inc. contacted {The Edmonton Sun} to flog its service that allows you
to make phone calls without having your number traced.  It could be a
popular service now that Call Trace and Call Display services are
widely available.  The company advertises its service by saying it's
meant for those who want to:

    o  Cheat on their wives.
    o  Fudge an expense account.
    o  Bet with a bookie. 
 
A news release from the Beverly Hills company says its creator, lawyer
Will Dwyer II apologizes for the suggested uses.  But you can bet he's
not apologizing for making money from people who use the system that
way!


Richard Nash   Edmonton, Alberta Canada T6K 0E8
UUCP:         trickie!rickie@ersys.edmonton.ab.ca
Date: 13 Sep 1992 19:28:07 GMT
From: at887@cleveland.Freenet.Edu (Scott Butler)
Newsgroups: comp.dcom.telecom
Subject: Eddie Argo, Where Are You? (Lost Book)
Reply-To: at887@cleveland.Freenet.Edu (Scott Butler)
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 711, Message 5 of 8

Perhaps some kind soul in NetLand can help me out.

Years ago I read a piece of fiction about a guy (I think that the
character's name was Eddie Argo) who was a computer programmer for the
city of Buffalo NY.  The character fakes his own death, steals a van
and a computer, and becomes a hi-tech Robin Hood, travelling around
the country hacking into systems to "steal from the rich and give to
the poor".  I've been looking for the book the past couple of years
but am a little bit hamstrung by the fact that not only can't I
remember the name of the book, I *also* can't remember the name of the
author.

Can anyone help me out?  I'd like to find out (at least) the name of
the book and the authors name.  The publisher and publication date
would also really be helpful.


Thanks a lot!

Scott   Butler
Date: Sun, 13 Sep 1992 20:03:30 GMT
From: jmalcolm@sura.net (Joseph Malcolm)
Newsgroups: comp.dcom.telecom
Subject: Re: Disaster Reporting On Usenet
Organization: SURAnet, College Park, MD
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 706, Message 6 of 13

In article <telecom12.698.6@eecs.nwu.edu> Tom Coradeschi <tcora@pica.
army.mil> writes:

> YSAR1111@YORKVM1.BITNET writes:

>> I am surprised that Usenet, as powerful a medium as it is, has not
>> been more widely used to coordinate disaster relief activities.  For

>> Are there any folks out there who have experience in creating a new
>> newsgroup, and are willing to moderate a discussion and run a vote for

> I'm not sure that this is such a great idea. The propagation delay
> thru Usenet (due to the nature of the beast) is such that news tends
> to travel rather slowly. Sure some very well connected sites (anyone
> hanging off UUNET, for example) will get news quickly, but many of the
> rest of us are in veritable backwaters. Not really the greatest way to
> get out timely or critical information.

That depends on what software you are running. With INN or a hacked C
News, propagation delays are typically less than two or three seconds.
News propagates through the de facto "backbone" quite quickly. I'd
estimate that news passing through darwin.sura.net probably hits a
hundred machines in at least a dozen states and and a couple of
foreign countries within a minute, and I suspect I am underestimating
things considerably.

It is true that those people a few hops off the fast propagation path
(or using uucp) will have delays on the order of hours or days, but
for quite a few sites that is no longer so.


Joseph Malcolm		jmalcolm@sura.net		
SURAnet Operations	+1 301 982 4600
Date: Thu, 10 Sep 92 23:02:46 CST
From: Jack.Winslade@ivgate.omahug.org (Jack Winslade)
Newsgroups: comp.dcom.telecom
Subject: Here We Go Again :-(
Reply-To: jsw@drbbs.omahug.org
Organization: DRBBS Technical BBS, Omaha
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 700, Message 6 of 11

Well, gang, it's HWGA time.  Will U.S West EVER Learn ??

Tonight, one of the stories on TV news (KETV, ABC affilliate) was US
West starting Yet Another electronic yellow pages service (with other
information services coming Real Soon Now) in Minneapolis.  Yes, they
are using that Minitel 'High-tech French method'.  The demo looked
like the resolution of an Atari 2600 video game.

Here's the good part.  There's a $.15 per minute charge to use the
service.  IMAO, I can't see why anyone would pay a per-minute charge
to look up info on a system when they can simply flip through the good
(??) old-fashioned tree-wasting, bicep-building, landfill-clogging
yellow pages, now available in two competing editions.

I sure wish Ma Bell would cure herself of this case of anal-cranial
inversion and realize that it would be MORE PROFITABLE in the long run
to offer the service to consumers for free and save the
money/trees/effort it takes to print and distribute directories.  (It
must be at least a couple of bucks each for something the size of
Omaha Metro.  Anyone know for sure ??)

For some reason, I can't imagine people are gonna beat down the doors
of US West in anxious attempts to use this service.
 
Good day.        JSW


[Moderator's Note: Jack, meet Andy Burt ... Andy, meet Jack! Maybe the
two of you can start something going and convince USWest of the error
of its ways ...  PAT]
From: tls@panix.com (Thor Lancelot Simon)
Newsgroups: comp.dcom.telecom
Subject: Fast, Cheap Async Short-Haul Modems?
Date: 7 Sep 92 11:09:52 GMT
Organization: PANIX Public Access Unix & Internet, NYC
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 689, Message 3 of 19

I'm looking for some inexpensive short-haul modems that will go
38400bps on async RS232.  I've seen fairly inexpensive models in the
Black Box and South Hills catalogs (well, inexpensive for the catalogs
in question) that will go up to 19200 async, and some that will go
38400 synchronous, but nothing that will go 38.4 async.  I only need
to traverse about a half-mile stretch of two-pair, so though it's too
far for RS422, even the el-cheapo low-power models seem to offer
enough in that respect.  Can anyone suggest a reputable, fairly
inexpensive source for what I'm looking for?  Alternately, if nobody
builds any that wil do 38.4K async, a cheaper source than the
aforementioned catalogs for a model that will work at 19.2K would be
appreciated!


Thor Lancelot Simon	 tls@panix.COM
Date: Tue, 8 Sep 92 12:19:38 GMT
From: vixen!jadams@uunet.UU.NET (26070-adams)
Newsgroups: comp.dcom.telecom
Subject: Re: A/A1 Answer Supervision
Organization: Bellcore, Livingston, NJ
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 695, Message 9 of 14

In article <telecom12.688.10@eecs.nwu.edu>, Tom Metro <tmetro@ds5000.
dac.northeastern.edu> writes:

> leonard@qiclab.scn.rain.com (Leonard Erickson) writes:

>> dcg5662@hertz.njit.edu (Dave Grabowski) writes:

>> It's probably set up to do A/A1 answer supervision. That means that
>> when you take it off hook, it *shorts* the second pair of wires
>> together.

> What is the purpose of shorting the second pair of wires? It sounds
> redundant to the information you can get by monitoring the loop
> current.  Could you explain the purpose of A/A1 answer supervision?

The A and A1 leads originate with Key Telephone Systems where their
function was to operate {Can you say "A" Relay :-)!} relays in the Key
System (Those grey colored boxes of various sizes which hung on walls
or lurked in closets).  The timing of these lead closures in relation
to the presence of loop current is what operated the "Hold" feature of
key systems.


Jack (John) Adams	    Bellcore RRC 4B-259
(908) 699-3447 {Voice}	    (908) 336-2871 {Facsimile}
jadams@vixen.bellcore.com   kahuna@attmail.com