daemon@ucbvax.UUCP (08/24/84)
From @MIT-MC:Telecom-Request@MIT-MC Thu Aug 23 16:02:06 1984
TELECOM Digest Friday, 24 Aug 1984 Volume 4 : Issue 72
Today's Topics:
Telephone Headsets
Universal Dialing
Re: Multi-pair color codes
DA charges
5-line wiring
Re: TELECOM Digest V4 #71
SW Bell chooses Sprint
Loud Touch-Tones
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Date: Wednesday, 22 Aug 1984 17:51:08-PDT
From: nelson%quill.DEC@decwrl.ARPA (The universe is laughing behind
From: your back)
Subject: Telephone Headsets
What's the deal with telephone headsets? I think they're neat, but
the last time I checked into buying one, it was around $200! Does
anyone know why they're so expensive? Any ideas on where cheaper ones
can be found?
JENelson
Wed 22-Aug-1984 21:05 EST
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Sender: SAI-relay@MIT-MULTICS.ARPA
Date: Wed, 22 Aug 84 21:40 EDT
From: Frankston.SoftArts@MIT-MULTICS.ARPA
Subject: Universal Dialing
Reply-to: Frankston@MIT-MULTICS.ARPA (Bob Frankston)
The mention of the 700 NPA made me think of one that doesn't exist but
should. One of the 800 services available redirects calls to a local
handler. But the callee pays.
It would make sense to have a similar service where the caller pays.
It does seem silly to have to go through elaborate directories to find
the nearest Airline, Tymnet/Telenet/Uninet/MCI Mail etc number.
I should be able to dial 1-600-123-5456 from anywhere in the country.
The rates would be equivalent to what a call to the local number would
be. Admittedly this means that the charge would vary but at least it
would not present the distance independence properties that upset the
regulators with respect to 700 numbers.
It would also greatly simplify providing software that does dialing.
You would actually be able to ship a product wihout having to provide
elaborate directories that must be updated constantly. Note that in
the current system you cannot ship software that uses 1-617-123-4567
because that will not work within the 617 area Why?? I dunno, doesn't
seem to make sense, but that it is.
Of course, there is still the problem of prefixing to escape into the
global name space. I.e., the "9", or "8-1" or whatever it takes to
get out of the local PBX..
Does such a service exist?
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Date: Wed 22 Aug 84 22:07:36-EDT
From: Gene Hastings <Gene.Hastings@CMU-CS-C.ARPA>
Subject: Re: Multi-pair color codes
On 2 & 3 pair cables, green, black and white are tips of pairs
1, 2, and 3. Red, Yellow and blue are the respective rings.
On multi-pair cables the colors blue, orange, green, brown and
slate (gray) are paired with white for the first 5 pairs, then with
red, then with black , yellow and violet for a total of 25 pairs.
Therefore:
Pair 1: blue/white; white/blue is tip
Pair 2: orange/white
Pair 3: green/white
Pair 4: brown/white
Pair 5: slate/white
Pair 6: blue/red red/blue is tip
etc.
Pair 11:blue/black black/blue is tip
ad nauseam.
You may occasionally find existing communications cables (not
necessarily telephone) that have unfamiliar or irregular color codes
-like the ICEA (Insulated Cable Engineers Association)color code for
control cable that has solid colors with several different stripes.
Look in the vendor's catalog to figure these out, or cut it out and
sell it for scrap.
Gene
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Date: 23 Aug 84 01:20:05 EDT
From: *Hobbit* <AWalker@RUTGERS.ARPA>
Subject: DA charges
.. It turned out that they saved 3 to 7 seconds and that
considering that
they were getting so many million phone calls...they saved lots of
money not spent on man-hours.
Then why the hell are they *charging* now, where they used to have
humans do all the work for free?? It's all so bass-ackwards. Between
that, 1+, ''thank you for using AT&T'', and the inferior audio quality
of the alternate carriers, it's almost enough to make one want to punt
phone service entirely. Wait till the USPO has to go through the same
thing.
_H*
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Date: 23 Aug 84 01:33:46 EDT
From: *Hobbit* <AWalker@RUTGERS.ARPA>
Subject: 5-line wiring
Someone recently asked which wires are ring and tip on various
configurations. I dug this out of some documentation a while back; it
represents a more-or-less standardized way that TelCo wires their
5-line phones thru 50-conductor cable. I checked out the colors in a
''virgin'' WE fern removed from service, and they are the same. Most
of the connections come up to that grey plastic thing under the dial
with all the screws on it. The line columns are under each pickup
key.
--5-line wiring-- Fern Wire Amph Comments conn colors conn.
---- ------ ----- -------- 1R BluWht 1 Line 1 Ring 1T WhtBlu 26 Line 1
Tip 1B OrgWht 2 Line 1 "A1" lead 1H WhtOrg 27 Line 1 "A" lead 1L
GrnWht 3 Line 1 Lamp LG WhtGrn 28 Line 1 Lamp Ground [on the 1x group]
2R BrnWht 4 Line 2 <ditto> 2T WhtBrn 29 . * GryWht 5 ?? - . 2H
WhtGry 30 . 2L BluRed 6 . LG RedBlu 31 . 3R OrgRed 7 Line 3 3T
RedOrg 32 . * GrnRed 8 . 3H RedGrn 33 . 3L BrnRed 9 . LG RedBrn 34
. 4R GryRed 10 Line 4 4T RedGry 35 . * BluBlk 11 . 4H BlkBlu 36 .
4L OrgBlk 12 . LG BlkOrg 37 . 5R GrnBlk 13 Line 5 5T BlkGrn 38 . *
BrnBlk 14 . 5H BlkBrn 39 . 5L GryBlk 15 . LG BlkGry 40 . 1 BluYel
16 Aux signals: 2 YelBlu 41 . 3 OrgYel 17 . 4 YelOrg 42 . HL
GrnYel 18 Hold light HLG YelGrn 43 . SG BrnYel 19 PB sig - ground to
aux equipment L2 YelBrn 44 Buzzer light RR GryYel 20 Common Ringer [is
line out to network block!] RT YelGry 45 . ER BluVio 21 Excluded ckt
ET VioBlu 46 . [fone home!] EB OrgVio 22 . ["A1" for excl] EH VioOrg
47 . ["A" for excl] R GrnVio 23 Speakerfern hook [R1 lead] RR VioGrn
48 . [T1 lead] ON BrnVio 24 . [P3] ON1 VioBrn 49 . [P4] L1 GryVio 25 .
[LK] N VioGry 50 . [AG] Lines: 1,26 4,29 7,32 10,35 13,38 "A" : 2,27
5,30 8,33 11,36 14,39 Lamps: 3,28 6,31 9,34 12,37 15,40 CommR: 20,45
... Most of the *meanings* of the wires wasn't explained in any kind
of text, so if you want further info you'll have to experiment, or try
to to contact WE or someone else who makes 5-liners and get some
additional documentation.
_H*
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Date: 23 Aug 84 09:22:14 PDT (Thursday)
From: Thompson.PA@XEROX.ARPA
Subject: Re: TELECOM Digest V4 #71
Re: NYC area code split (MSG from <KENNER@NYU-CMCL1.ARPA> in V4 #71)
I would think that in the New York City case that updating company
phone lists would be pretty easy. In this case they must be sortable
along Zip Code lines. Does anybody happen to know if "The Phone
Company" tries to do this when they split an area code or whether they
just lucked out this time because Zip boundaries and exchange
boundaries are likely to coincide when you come to a big river?
Geoff <Thompson.pa@XEROX.ARPA>
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Date: 23-Aug-1984 1523
From: covert%castor.DEC@decwrl.ARPA (John Covert)
Subject: SW Bell chooses Sprint
This news item was in the August issue of Telecommunications magazine:
Southwestern Bell Telephone Co. has selected GTE Sprint Communications
Corp. to provide interstate long-distance service. The GTE Sprint
Service will save the former BOC an estimated 17 percent ($50,000
annually) on certain business long-distance calls originating from
Houston. Sprint will handle all official long-distance calls made by
Houston telephone employees to locations outside Southwestern Bell's
traditional five-state territory. Because of divestiture, SW Bell
cannot maintain its own facilities outside its territory and must
contract with long-distance companies for service.
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Date: Thu, 23 Aug 84 09:52:05 pdt
From: sdcsvax!sdccsu3!brian@Nosc (Brian Kantor)
Subject: Loud Touch-Tones
Most touch-tones phones have a resistor in series with the receiver
element which is used to drop the level of tones while dialling.
During the time that a button is NOT pushed on the dial, this resistor
is shorted out so that full level is sent to the receiver element.
Probably the phone you used had the contacts in the dial stuck
together so the resistor didn't get in the circuit when you pushed a
button. Maybe somebody spilled Coke into it or something.
ihnp4 \ Brian Kantor, UC San Diego
decvax \
akgua >---- sdcsvax ----- brian
dcdwest/
ucbvax/ Kantor@Nosc
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End of TELECOM Digest
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