TELECOM@Usc-Eclb (06/22/82)
TELECOM AM Digest Tuesday, 22 June 1982 Volume 2 : Issue 77
Today's Topics: Pay Telephone Wiring Query
CCSA / ETN / EPSS
Query - Where Do You Use Your Own Area Code?
Custom Calling II - 1A Voice Storage System
MCI Rate Hike & American Bell
Information Wanted - HDLC/SDLC Cards For LSI-11's And VAXen
Washington DC Phone Kludge - Alternate DC Area Codes
Newspaper Items (1+)
New Dolphin User's Group
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Date: 13 Jun 82 01:22:59 EDT (Sun)
From: Steve Bellovin <smb.unc@UDel-Relay>
Subject: pay phones
How many wires are used to control a pay phone? Do the coin detection
devices operate over the voice pair, or over a separate pair? Is this
different for "dial tone first" phones? I sometimes see ads in
surplus catalogs for old pay phones (from the pictures, the
non-armored type), which, it is alleged, one can easily hook up at
home.
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Date: 13 Jun 1982 2042-EDT
From: John R. Covert <RSX-DEV at DEC-MARLBORO>
Subject: CCSA / ETN / EPSS
There was a good discussion here a while ago about CCSAs, but a very
important point was left out:
What is now being sold in most cases rather than CCSAs are other
arrangements built up out of Dimension PBXs, CENTREXs, Rolm CBXs, and
other modern PBXs which can do translation on the number given. Not
all networks which take 8+7D are CCSAs, in fact, as was said before,
only 29 are.
The system described which doesn't allow calls within the nearby area
to be called over the system isn't taking advantage of newer
technology which could translate the on-network number to the cor-
responding off-network number. You'd only want to do that for the DID
PBXs, so the dichotomy of being able to direct dial the non-DID PBX
from across the country, but not locally, would still exist. Some
companies have been known to translate all extensions to a single main
number in that case, but that is often more confusing.
AUTOVON is not always 4-wire end-to-end. There are two ways in which
AUTOVON is accessed. One is as a subscriber, in which case the
special 4x4 dials are used, and the telephone sets are 4-wire. The
other, much more common way, is by dialing the AUTOVON access code
(almost always 8) from a regular PBX station, and then the number
desired. A real good description of AUTOVON appears in the April 1968
Bell Labs Record.
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Date: 14 Jun 82 8:40:01-EDT (Mon)
From: Carl Moore (VLD/VMB) <cmoore@BRL>
Subject: use your own area code?
There are some cases where you are required to use your own area code.
1. Operator-assisted calls within NYC require 0+212+number (7 digit).
This is consequence of N0X and N1X prefixes being allowed in NYC.
As discussed earlier in this digest, area 213 (which includes LA)
also allows N0X and N1X, but requires only 0+number (not
0+213+number) on operator-assisted calls within 213 area, with
delayed "timeout" taking care of ambiguities (e.g. 0-413-2345 vs.
0-413-234-5678). These notes about 213 will also ap- ply to 818,
to be carved out of 213 in 1984.
2. Long-distance (direct-dial or operator-assisted) from most Md. and
Va. suburbs of DC. In long-distance from DC area (DC and most
suburbs) you dial area code + number (put 0 in front for
operator-assist), even from Md. suburbs to distant parts of Md. or
from Va. suburbs to distant parts of 703 area.
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Date: 14 June 1982 21:38 edt
From: Frankston.SoftArts at MIT-MULTICS
Subject: 1A Voice Storage System
Reply-To: Frankston at MIT-MULTICS (Bob Frankston)
For those of you are are interested, the current (May/June 1982 Vol
61, No 5) issue of the Bell System Technical Journal has a series of
articles on the 1A Voice Storage System. There is an appendix listing
the acronyms used in the article.
It discusses the protocols for using both the call answering services
and the store and forward message services. The answering provides
date/time tagging. They also have a Remote Access feature for
accessing messages and setting the recording. Such feature might be
extended to setting call forwarding info.
The store and forward service provides a voicegram capability.
Wonder what the tariff status is for these services (Custom Calling
II)?
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Date: Wed 16-Jun-1982 17:26-EDT
From: Bill Russell <RUSSELL at NYU>
Subject: MCI Rate Hike & American Bell
In the NY Times, Wed June 16th:
The MCI Communications Corporation said it would file ''modest''
long-distance rate increases of 5 percent to 6 percent affecting its
largest business customers, effective July 1, and that it would
increase some long-distance charges for residential customers on Aug.
1. Together, the moves should increase revenue by $10 million to $15,
or about 3 percent, MCI said.
Also there was a full page ad for ''American Bell'' for Advanced
Information Systems (AIS/Net One). A small article was in the business
section. ''American Bell'' will be an unregulated company. This is
what used to be called ACS.
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Date: 16 Jun 1982 1434-PDT
From: Barry Megdal <BARRY at CIT-20>
Subject: HDLC/SDLC cards for LSI-11's and VAXen
Does anyone have any information on availability of cards for the Q-bus and
or Unibus that implement the HDLC or SDLC bit protocols? I know about
DEC's DPV-11 for the Q-bus, but am interested in other sources, and in cards
that will run faster than 56 kbits/sec.
Thanks.
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Date: 14 Jun 82 13:35:21-EDT (Mon)
From: Carl Moore (VLD/VMB) <cmoore@BRL>
Subject: alternate DC area codes
Suppose I am making long-distance call:
from Md. to Md. suburbs of DC
OR
from Va. to Va. suburbs of DC
Does it affect the rates if I use area code 202 for such intrastate
calls? I would be inserting area code 202 on such calls in Md. or 703
area, and would substitute 202 for 703 on such calls in area 804.
(I made an operator-assisted long-distance call from Md. to a Md.
suburb and it did indeed go thru even though I specified area code
202; note that the call was within Md.; it was from pay phone NOT
equipped for 0+.)
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Date: 17 Jun 82 8:01:49-EDT (Thu)
From: Carl Moore (VLD/VMB) <cmoore@BRL>
cc: cmoore at BRL
Subject: newspaper items (1+)
I have located the following New York Times items about implementation
of "area code" prefixes (and consequent implementation of 1+ for
direct-dial to other areas) in areas 213 and 212.
July 22, 1973; p. 16 col. 2. Telephone companies on coast solve a
numbers problem by adding an extra digit. (Done during the previous
week.)
Sept. 23, 1980; p.1 col. 4. New York Telephone adding a 1 for
out-of-town calls. (to take effect 11-22-1980) (A while ago, I
commented about having been in NYC and seeing an instruction card on
pay phone; this was the day before, 11-21-1980.)
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Date: 18 Jun 1982 2123-PDT
From: T. C. Rindfleisch <Rindfleisch at SUMEX-AIM>
Subject: Xerox 1100 (Dolphin) User Group
This is to announce formation of a network user group for Xerox 1100
workstations (Dolphins). Its purpose is to stimulate communication
and sharing between computer science research groups that are using or
are interested in these machines. It differs from the WORKS group in
that it will focus on issues particular to Dolphins rather than on
workstations in general.
Xerox PARC and EOS people are included in the distribution list to
facilitate communications about new developments, bugs, performance
issues, etc. As with all network interest groups, however, this is
*NOT* to be used as a vendor advertising vehicle.
User Group Mechanics --
1) Network Addresses:
Dolphin-Users@SUMEX-AIM For mail distributed to the
entire user group
Dolphin-Requests@SUMEX-AIM For distribution list
maintenance, i.e., additions,
deletions, problems, etc.
2) Mail Handling: SUMEX-AIM will serve as the expansion point for
routing messages to group members. We run XMAILR and so can route
between most of the current internet community.
3) Administration: Initially, messages will be sent to the list as
submitted. Depending on the volume of mail, content, etc., messages
may be collected and digested in the future.
I have assembled a list of known Dolphin users and liaisons from various
sources for this initial announcement. Please pass the word on to
others you think might be interested.
Tom R.
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End of TELECOM Digest
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