HDTenEightyP/NetNews huggingface dataset:
From: njonker@cs.vu.nl (Jonker N)
Newsgroups: alt.dcom.telecom
Subject: File transfer over INternet and Phone.
Date: 21 Aug 92 19:50:22 GMT

Hi,

I use several Unix systems, and ran into a problem now. The situation is like
this. I originate at a system that is hooked to the net at cs.vu.nl, from there
I use telnet to get to a dialout modem in the USA. I use that to dial into
another UNIX system. Now the problem: How do I transfer files from the one 
system to the other? That system I am trying to get the files to does NOT ha-
ve any UUCP software installed yet. How do I do this??

PLEASE use e-mail to reply to me, I do not read this group normally.

Niels
-- 
Niels Jonker, njonker@cs.vu.nl, n_jonker@sacam.oren.ornl.gov
From: scoggin@opus.ee.udel.edu (John K Scoggin)
Newsgroups: alt.dcom.telecom
Subject: Re: A Strange Tone (not modem or fax)
Date: 22 Aug 92 13:34:07 GMT
Organization: Delmarva Power & Light Company, Newark

In article <9208212055.AA10418@nettlerash.berkeley.edu> ECZ5ACK@MVS.OAC.UCLA.EDU (Andy Kohler) writes:
>
>I misdialed a local number, accidentally reaching (818) 781-0002.
>There was no ring, just a very loud single frequency tone which
>lasted about 8 seconds, followed by a brief pause, then repeating.
>It's not a standard modem or fax tone.  I tried dialing several
>other numbers of the form NXX-0002, and almost always got the same
>result.  What is this tone, and what purpose does it serve?
>

This is a test tone, probably consisting of a 1004 Hz tone followed by
silence.  This is used to align the transmission levels of trunks and
tie lines and to measure the noise level.

We use the same units here on each of our PBX switches.

	- John

-------------------------------------------------------------------------
John K. Scoggin, Jr.			Email:   scoggin@udel.edu
Supervisor, Network Operations			 scoggin@delmarva.com
Delmarva Power & Light Co.		Voice:	 302-451-5200
P.O. Box 6066				Fax:	 302-451-5321
Newark, DE 19714-6066
-------------------------------------------------------------------------
Your milage may vary.  Void where prohibited by law (or common sense).
Newsgroups: alt.dcom.telecom
From: zoran@ee.uts.edu.au (Zoran Markovic)
Subject: A question or two on GSM
Organization: University of Technology, Sydney, Australia
Date: Thu, 13 Aug 1992 12:15:56 GMT
Summary: A question or two on GSM
Keywords: mobile

Could someone in the know on the European digital mobile radio standard
GSM (Group Special Mobile "pardon my French") answer the following
questions:

1.  Which countries, apart from the original 13, have signed-in on
this standard.  There are supposed to be around 19 at the moment.

and the second realy difficult one:

2.  Which other countries in Europe/Middle East/North Africa are
very likely to sign-in or implement it? 

This is very important and all answers will be graetly appreciated.

Zoran Markovic
University of Technology, Sydney
Australia
Internet: zoran@ee.uts.edu.au 
Newsgroups: alt.dcom.telecom
From: jrblack@teal.csn.org (Roger Black)
Subject: Bizarre answering machine behavior
Organization: Colorado SuperNet, Inc.
Distribution: usa
Date: Tue, 18 Aug 1992 04:16:17 GMT

I am in desperate need of some help with an AT&T "Answering System
Telephone 1532".  It's a two-line answering machine that uses
minicassettes and has all sorts of fancy bells and whistles, all of
which seem to work fine except for the most basic and important
function--i.e., answering the phone and taking a message.

The problem is this:  When the unit hits the appropriate ring, it
dutifully answers the phone--and then drops the line.  The caller does
not hear the outgoing message, does not get a beep, has no opportunity
to leave a message; all he/she gets is a deep silence followed by a
disconnect.  The little red "in use" light flashes as it is supposed
to while the phone is ringing, but goes out as soon as the phone is
answered and never comes back until the next call.

I have been through this several times with AT&T's 800 help number, to
no avail.  They were very kind and apologetic, and talked me through
all the standard stuff--swapping the cassettes, resetting the
microprocessor, verifying all the switch settings, etc.--but in the end
they gave up and said they didn't have a clue.  I also talked to U.S.
West and even had a repairman come out and look at the line, also to no
avail.  

Since it was still under warranty, I took the machine back and got a
replacement unit of the same model, but the new unit does exactly the
same thing as the old one.  Finally I borrowed a "PhoneMate" answering
machine (i.e, one *not* made by AT&T) and it seems to work just fine.
Unfortunately, I don't know whether that really exonerates U.S. West
and puts the blame on AT&T, or whether the PhoneMate just happens to
be a little more tolerant of some out-of-spec condition in the local
circuit that AT&T can't (but shouldn't have to) handle as well.

The people at AT&T did suggest that maybe the local line voltage was too
low, so I put a meter on it.  It shows 50 volts when waiting for a call
or ringing, but drops to about 8 to 12 volts when the phone is
answered.  I asked the U.S. West repair service if that was normal, and
they told me they didn't know anything about voltage levels and had no
way of finding out.  Ditto with the repairman.  As you can imagine,
that failed to instill in me a deep sense of security about the quality
of our local service.

Any of you phone wizards out there have any idea what the hell is going 
on?  I'm about ready to swear off answering machines for life.

-----------------------------------------------------------------------
 James Roger Black                                     jrblack@csn.org
-----------------------------------------------------------------------
From: richg@hatch.socal.com (Rich Greenberg)
Newsgroups: alt.dcom.telecom
Subject: Re: Bizarre answering machine behavior
Date: 21 Aug 92 22:00:11 GMT
Organization: Hatch Usenet and E-mail.  Playa del Rey, CA

In article <171athINNc6t@network.ucsd.edu> u_banzai@mcl.ucsb.edu (Marc Tamsky) writes:
>In article <Bt8qJA.CCK@hatch.socal.com> Rich Greenberg,
>richg@hatch.socal.com writes:
>>        connect a .001 creamic disk capacitor from each side of the
 . . . . .
>		use units when posting information containing capactior values

I strongly doubt that anyone familiar with electronics (including the
clerk in the rat shack) would have any problems guessing that the
unit in question is the microfarad.  Tiny capacitors are marked
in picofarads, and .001 pf would be the capacitance of two wires
seperated by a foot or so.  Hardly a practical value.
Huge capacitors are rated in thousands of mf, and .001 farad
would be 1000 mf.  Marking capacitors in farads would be very unusual.
a 1 farad capacitor at a reasonable working voltage would be around
the size of a desk.
-- 
                
Rich Greenberg - N6LRT - 310-649-0238 - richg@hatch.socal.com
From: dcg5662@hertz.njit.edu (Dave Grabowski (KxiK))
Newsgroups: alt.dcom.telecom
Subject: Re: Touch Tone Electronics
Date: 15 Aug 92 22:34:10 GMT
Organization: New Jersey Institute of Technology, Newark, N.J.

In article <92226.224545IO20197@MAINE.MAINE.EDU> IO20197@MAINE.MAINE.EDU (Rob Champagne) writes:
>I am intersted in using a touch tone telephone's number pad as an array of
>input switches for an electronic project that I am designing.  I was told
>a long time ago that there is a chip that continuously scan the 3x4 array
>for a keypress, determines which key was pressed, and then sends a code out
>for other circuitry to see.  I'm hoping for a TTL chip.  Anyone know?  How
>about where can I get more info?  A book?

  It depends what kind of output you are looking for. If you are looking
for the actual DTMF tones, you can use a chip like the MK5088 or
similar. The chip, running of a check 3.58mhz colorburst crystal,
generates the DTMF tones when connected to a 3x4 or 4x4 keypad.

-Dave

-- 
----------------------------------------------
Kappa Xi Kappa - Over and Above!
-----------------------------------------------
From: desouza@math.berkeley.edu (Paulo de Souza)
Newsgroups: alt.dcom.telecom
Subject: Long distance Radio-phones, who knows about them ?
Date: 17 Aug 1992 07:55:03 GMT
Organization: U.C. Berkeley Math. Department.
Distribution: world
NNTP-Posting-Host: math.berkeley.edu


Recently I hada request from a friend in Brazil to get him a phone-radio
system here in the US that he could use to connect a remote place in a
farm to his phone at home, and the rest of the world. 

I have never heard of these kind of systems before that are essentially a
 
			phone <=> radio <=> phone 

kind of link, and that allows one to install a phone on a remote place, 
with distances up to 60 miles, so I went on the search for some info.

Then I learned that there are some companies here that sell these systems
(mainly manufactured in Japan), that they are illegal to use here in the US, 
..., and since them I have been in touch with a couple of companies
that sells these systems: Phone Masters and Megatronics Inter. both of the
LA area, but getting information on these systems and on their reliability 
has been hard.

For example I have not been able to get the answer for the simple question:
What happens if there is a mountain in between ? Does it only get worse ?
Does it work at all ?

Where can I get some information on these radio-phones being sold in US? 

Paulo de Souza
desouza@math.berkeley.edu
Newsgroups: alt.dcom.telecom
From: rice@ttd.teradyne.com
Subject: Re: Bizarre answering machine behavior
Organization: Teradyne Inc., Telecommunications Division
Distribution: usa
Date: Thu, 20 Aug 92 21:56:14 GMT

In article <Bt5vv5.L1r@csn.org>, jrblack@teal.csn.org (Roger Black) writes:
> I am in desperate need of some help with an AT&T "Answering System
> Telephone 1532".  It's a two-line answering machine that uses
> minicassettes and has all sorts of fancy bells and whistles, all of
> which seem to work fine except for the most basic and important
> function--i.e., answering the phone and taking a message.
> 
etc
> 
> The people at AT&T did suggest that maybe the local line voltage was too
> low, so I put a meter on it.  It shows 50 volts when waiting for a call
> or ringing, but drops to about 8 to 12 volts when the phone is
> answered.  I asked the U.S. West repair service if that was normal, and
> they told me they didn't know anything about voltage levels and had no
> way of finding out.  Ditto with the repairman.  As you can imagine,
> that failed to instill in me a deep sense of security about the quality
> of our local service.
> -----------------------------------------------------------------------

Can't help you much with the answering machine, but I can tell you that the
voltages that you saw were reasonable. Normal Idle line voltage for most
commonly installed telephone switches is -48 to -53vdc (with a few as high
as -60v). 

Off hook voltage is a function of a: Loop resistance (which runs about 200 ohms
per mile for 22ga wire), b: Design of the line card in the switch, and c: 
termination resistance of the Phone.

-- 
   John Rice        K9IJ     |  "Did I say that ?" I must have, but It was
                             |   MY opinion only, no one else's...Especially
                             |   Not my Employer's....
   rice@ttd.teradyne.com     |   Purveyor of Miracles,Magic and Sleight-of-hand
From: mgreeny@uxa.ecn.bgu.edu (Greeny)
Newsgroups: alt.dcom.telecom
Subject: re: endless loop consumer tape product
Date: 14 Aug 92 02:35:01 GMT
Organization: Greeny's Bar & Grill

The only problem I see with using an endless loop tape is that it WILL
wear out after a week or so of continuous use (if you just let the thing
run....).  Something on the order of an answering machine with a digital
tape recording playing into the line input would be what you want...
-- 

Microcomputer Support Specialist, Student Residential Programs
Western Illinois University, Macomb, IL  61455
Internet: mgreeny@uxa.ecn.bgu.edu (preferred) GEnie: GREENY (once a month)
From: naddy@rhrk.uni-kl.de (Christian Weisgerber)
Newsgroups: alt.dcom.telecom
Subject: Re: How does RTS work?
Date: 12 Aug 92 11:05:42 GMT
Distribution: eunet
Organization: University of Kaiserslautern, Germany

lars@spectrum.CMC.COM (Lars Poulsen) writes:

> You want to apply flow control from the computer back to the modem.
> You can't do that ....

Sure you can.

> RTS means "Request To Send". When the computer wants to transmit, it
> is supposed to raise RTS, and when the modem is actually able to send
> data, it will raise CTS ("Clear To Send") and then you can go ahead and
> send data on TxD ("Transmitted Data"). This handshake was defined in the
> days of half-duplex and multidrop modems; the modem needed to establish

Right, that's one ancient RTS/CTS protocol with half duplex modems.
Today modems still support this protocol in synchronous modes but async
transmissions are assumed to be full duplex and the use of RTS/CTS is
completely different there.

> before it could allow it to be modulated. Nowadays, we always keep the
> carrier on and tie RTS high.

If you do so you deprive yourself of the only reliable handshaking
method. Pitiful.
Nowadays full duplex modems support RTS/CTS usage in this way:
- The modem uses CTS to signal that it is ready to receive data.
- The terminal/computer uses RTS to signal that it is ready to receive
  data.
It's called bidirectional hardware flow control.

> I hear you saying but hardware flow control ... well, yes, some folks do
> that, but it isn't in RS232 or V.24, and it isn't reliable.

If done right, it *is* reliable.
Concerning the RS232 specs, a few days ago there was a posting by Toby
Nixon of Hayes explaining that today's usage of RTS was designed into
RS232 but with a different signal (I forgot name/pin number). However
by now this functionality has been incorporated into what is commonly
called "RTS".

> And with the 16550 FIFO, you still need to go in and toggle RTS under
> software control; the 16550 so far as I know does NOT do hardware flow

Exactly there's the problem. If the machine is so much tied up (because
of brain dead device drivers etc.) that it can't answer the IRQ at all,
you're losing characters again. This seems to be a common problem with
PCs. The error isn't the usage of RTS/CTS but rather the software and
hardware architecture you pay for when buying a PC.

> What is REALLY infuriating, is that you would think that internal modems
> should be able to do this. I mean, when there isn't even a real 16550 in
> there, but the 16550 function is simulated by the modem processor, and
> the FIFO is really a corner of the modem's RAM, you'd think it should be
> possible to NEVER see overruns. But in actuality, you find that the

In this szenario, if the modem still overruns it can be designated
"broken".


bye
-- 
Christian 'naddy' Weisgerber, Germany           naddy@rhrk.uni-kl.de
Newsgroups: alt.dcom.telecom
From: richg@hatch.socal.com (Rich Greenberg)
Subject: Re: Speaking of answering machines
Organization: Hatch Usenet and E-mail.  Playa del Rey, CA
Distribution: usa
Date: Wed, 19 Aug 1992 17:13:57 GMT

In article <1992Aug18.214756.23997@news.weeg.uiowa.edu> smills@news.weeg.uiowa.edu (MuffinHead) writes:
>   I have an AT&T 5150 or something like that. When I pick up the handset
>(whether there's a call or not) I hear AM radio. None of my other phones
>have that problem, so I know it's a problem with the unit not being properly
>shielded. Anything I can do about this?

Depends if you are handy or not.

if handy
   then do
        Open up the unit
        connect a .001 creamic disk capacitor from each side of the
            power line input to chassis ground
        connect a .001 creamic disk capacitor from each side of the phone
            line input to ground
        put back together
        end
   else do
        Go to phone/hardware/electronics store and ask about power
            line and phone line filters.
        purchase same
        install same
        end

-- 
                
Rich Greenberg - N6LRT - 310-649-0238 - richg@hatch.socal.com
Newsgroups: alt.dcom.telecom
From: tim@maths.tcd.ie (Timothy Murphy)
Subject: What are all these wires for?
Summary: How can I connect this ancient phone?
Keywords: Telephone handset wire colours
Organization: Dept. of Maths, Trinity College, Dublin, Ireland.
Date: Thu, 20 Aug 1992 16:32:41 GMT

I have an ancient phone with 8 variously coloured wires
coming out of it.
Do these colours have any generally agreed meaning?

Our public system only seems to use 2 wires,
but I have been unable to connect my phone.
Perhaps some of the wires have to be connected together?

Any suggestions gratefully received.
Are there any books on this subject?

My wife is very keen on this phone,
which was said to be working recently
with an office system.

-- 
Timothy Murphy  
e-mail: tim@maths.tcd.ie
tel: +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland
From: ECZ5ACK@MVS.OAC.UCLA.EDU (Andy Kohler)
Newsgroups: alt.dcom.telecom
Subject: A Strange Tone (not modem or fax)
Date: 21 Aug 92 20:55:00 GMT


I misdialed a local number, accidentally reaching (818) 781-0002.
There was no ring, just a very loud single frequency tone which
lasted about 8 seconds, followed by a brief pause, then repeating.
It's not a standard modem or fax tone.  I tried dialing several
other numbers of the form NXX-0002, and almost always got the same
result.  What is this tone, and what purpose does it serve?

Thanks.
Andy Kohler
ecz5ack@mvs.oac.ucla.edu
Newsgroups: alt.dcom.telecom
From: anto@dutetvd.tudelft.nl (Anto Daryanto)
Subject: About CDMA...
Organization: Delft University of Technology
Date: Thu, 13 Aug 1992 12:23:45 GMT

syd@dsi.com (Syd Weinstein):
> murthy@solomon.technet.sg (K.R.S.Murthy) writes:
>
>> Can anybody explain to me briefly in layman's words how CDMA
>> technology works?
>
> Here is a very simple explaination of CDMA (Carrier Detect Multiple
> Access):
>
> Before sending, listen to the line, if there is no carrier, then send.
>
> This is sort of like how we hold a group discussion on the phone ...
> if no one else is talking, then you feel free to talk, only this is
> for data.
>
> It is used on any 'multi-drop' kind of line instead of polling.  The
> carrier can be anything, from the RF carrier in a radio based
> application to the dc bias on an ethernet cable.

Well, it seems that Weinstein tries to explain the CSMA (Carrier Sense
Multiple Access). 

CDMA stands for Code Division Multiple Access. Just like the other
multiple access systems, TDMA (Time Division Multiple Access that uses 
time slot for the users, i.e. each user gets one time slot) and FDMA 
(Frequency Division Multiple Access, every user gets an amount of 
frequency bandwidth to transmits and receives) CDMA uses codes for the
users just like TDMA uses time-slots. Every code is unique and it is
called Gold Code. Of course the receiver knows exactly the codes of
the users that given by the transmitter.

This technique is very populair in the military technology because of
his anti-jamming property due to the codes.

--

Anto Daryanto
TU Delft, The Netherlands
Faculty of Electrical Engineering
Telecommunication- and Traffic Systems Group
E-mail: a.daryanto@dutetvd.et.tudelft.nl
From: chudley@canon.co.uk (Martin Chudley)
Newsgroups: alt.dcom.telecom
Subject: Using a trailbazer in 3 UK, Japan and US
Summary: Will Trailblazer work in UK, Japan & US
Keywords: Modem, Trailblazer
Date: 19 Aug 92 10:10:14 GMT
Organization: Canon Research Centre Europe Ltd

Apologies if this is in a FAQ somewhere.
We'd like to connect sites in UK, Japan and US using modems, but it would be
convenient if we could use the same kind in all places. I have no idea how
standard the various countries telephone systems are. Will the ubiquitous
Trailblazer suffice?

Any advice?

Thanks

-- 
Martin Chudley (Postmaster)

ARPA : chudley@canon.co.uk				Voice : +44 483 574325
UUCP : ...seismo!mcsun!uknet!canon!chudley		Fax   : +44 483 574360
From: postmaster@satlink.org.ar (Postmaster)
Newsgroups: alt.dcom.telecom
Subject: Modem calls to Brazil
Date: 20 Aug 92 19:32:00 GMT
Reply-To: postmaster@satlink.org.ar (Postmaster)
Organization: SatLink Communications (Buenos Aires - ARGENTINA)


-> I've spent much of the last 3 days trying to make a modem connection
-> with a PC in Brazil.  For some strange reason, I can't get anything
-> to work.  We've tried substituting everything in the hardware &
-> software.  It's gotta be the phone line but when I listen to the
-> connect, it doesn't sound bad - level seems high enough etc.  The
-> strange thing is that just once, I was able to connect with Commute
-> (pctools) and send a 150k file with no problems at all.  Every other
-> attempt (> 50 calls over 3 days 24 hours) was a failure.  This thing
-> is driving me nuts.  Anyone here know anything about the Brazilian
-> phone system?

Brazil have a very bad and old phone network!! Sao Paulo lines are a
disaster.  I worked in Brazil and the better connections that I had to
USA was through AT&T "USA DIRECT" service to TYMNET dialups at 9600bps
with V.42.  I heard about other companies in Sao Paulo, Brasilia and Rio
de Janeiro that they receive calls from USA at 9600 (v.32) with
MNP-5 or V.42bis without problems ONLY through AT&T and NEVER through
MCI nor SPRINT.
I don't know, but if you are using an EVEREX EVERFAX 24/96 forget to
obtain an international error free connection to South America.
Argentina and Brazil are connected through satelital lines and I can
connect to Sao Paulo from Buenos Aires at 2400bps with V.42 without
problems and NEVER at 14.400 (V.32bis).


Horacio Stolovitzky          E-Mail: postmaster@satlink.org.ar
SatLink Communications
Buenos Aires, ARGENTINA
From: ltf@ncmicro.lonestar.org (Lance Franklin)
Newsgroups: alt.dcom.telecom
Subject: Re: endless loop consumer tape product
Date: 17 Aug 92 18:16:21 GMT
Organization: NC Microproducts, Inc.

In article <1992Aug13.203459.19940@u.washington.edu> stevef@wrq.com (Steve Forrette) writes:
}In article <1992Aug13.061444.25069@eskimo.celestial.com> stevemc@eskimo.celestial.com (Steve McCallister) writes:
}>
}>Our small office has a telephone system with a line input for 
}>"music on hold".  What we'd like to do is have this dedicated
}>to a recording -- one minute or so -- of basic information 
}>about the business (i.e. hours we're open, other phone numbers
}>for contacting us, etc.)
}>Offhand, can someone think of an off-the-shelf consumer format
}>which would allow us to continuously substitute such a message
}>into the line input.  
}
}Get a regular tape player, then go to Radio Shack or other suitable store
}and get a 60 second "outgoing message" cassette for an answering machine.
}They are standard cassettes, but are in a continuous loop.  There is a foil
}splice so an answering machine knows where the beginning is, but if put
}into a regular cassette player, it will play it forever.  
}

This will wear out rather quickly...If I were you, if you can't find
some sort of digital solution, A longer term solution would be to obtain
an old reel-to-reel tape recorder with auto-reverse.  Set it to the
lowest possible speed with a long reel and record multiple copies of
your message to fill the tape in both directions.

You might want to use the endless tape to make the original, then pass
the output of the cassette into the reel-to-reel to make the multiple
copies.

Of course, if you have an old pc around, another solution would be to
get a soundblaster board, digitize your message and program the PC to
dump the digitized message to the soundblaster in an endless loop.  Of
course, it's a rather expensive solution, but as I said, if you already
have an old 8086 PC laying about useless, it might do the job.


Lance
-- 
Lance T. Franklin            +----------------------------------------------+
(ltf@ncmicro.lonestar.org)   | "You want I should bop you with this here    |
NC Microproducts, Inc.       |    Lollipop?!?"                 The Fat Fury |
Richardson, Texas            +----------------------------------------------+
Xref: sparky alt.dcom.telecom:518 sci.engr:1940