Classic Rotary Phones Forum

Telephone Switching => General Switching Discussions => Exchange Names, Area Codes etc => Topic started by: poplar1 on May 14, 2013, 07:52:52 PM

Title: Central Office Names
Post by: poplar1 on May 14, 2013, 07:52:52 PM
In Minneapolis, some phone numbers changed from 2 letters + 4 numerals to 2L + 5N in 1955. Here is the cover of the 1955 directory showing changes that year:

http://www.ebay.com/itm/261214428922


Title: Los Angeles Central Office Names in 1952
Post by: poplar1 on May 14, 2013, 08:46:42 PM
In 1952, Los Angeles had a mixture of 2 Letters + 4 numbers and 2 letters + 5 numbers.

http://www.ebay.com/itm/200922828956

Here are the office names shown on page 28-29; there may be others not listed:

2 letters + 4 numerals:      2 letters + 5 numerals

[22]   CApitol*                   CApitol 2-                             2 letter + 4 numerals: 4xxx, 8xxx, 9xxx, 0xxx
[23]   ADams*                   ADams 1, ADams 3-, ADams 4-             2L4N: 8xxx, 0xxx
[24]                                  CHapman 5, CHarleston 8-
[25]   ALbany                    CLeveland 6-, CLeveland 7-     ALbany numbers 1xxx, 9xxx, 0xxx
[26]   ANgeles                                                    
[27]                                  BRadshaw 2-
[28]                                  CUmberland 3-
[29]  AXminster*                AXminster 1-, AXminster 2-, AXminster 3-      2L4N: 8xxx


[38]                                  DUnkirk 3-, 4-, 7-, and 9-
[39]                                  EXbrook 1-, 5-

[43] HEmstead
[44] HIllside
[45] GLadstone
[46]                                  HOllywood 9-
[47] GRanite
[48]                                  HUdson 2-

[52] LAfayette
[54] KImball
[56] LOgan*                     LOgan 5- 8- AND LOrain 6-, 9-        *2L4N are LOgan 3xxx and LOgan 0xxx
[58] LUcas

[62]                                 MAdison 6-
[63]                                 NEvada 6-

[64] MIchigan
[65] OLympia
[66] NOrmandy*               NOrmandy 1-, 2-, 3-   *2L4N are NOrmandy 5xxx, 9xxx, 0xxx
[68] MUtual

[72] PArkway
[73] REpublic*                  REpublic 1-, 2-, 3-       *2L4N REpublic 6xxx
[74] RIchmond*                Richmond 7-, 8-          * 2xxx, 3xxx
[75]                                 PLeasant 1-, 2-, 3- AND PLymouth 4-, 5-, 6-
[76}                                ROck...(?) 9-        
[77] PRospect
[78]                                STate 4-
[79]                                PYramid 1- AND SYcamore 8-

[83]                                TExas 8-
[84] THornwall
[86]                                UNderhill 0-
[87] TRinity
[88] TUcker
[89] TWin oaks

[92] WAlnut
[93] WEbster*                   WEbster 3-, WEbster 8-
[94] WHitney
[96] YOrk
[99] WYoming
Title: Central Office Names: Long Island (New York)
Post by: poplar1 on May 20, 2013, 11:42:42 AM
http://www.eckers.com/pages/exchange.html
Title: Re: Central Office Names--Atlanta, Georgia
Post by: poplar1 on May 20, 2013, 12:36:26 PM
Central Office names for Atlanta, GA

Manual (non-dial)       Dial, 2 letters--4 numerals:                         Dial, 2L-5N:

Downtown:                 29 Auburn Ave.
                                WAlnut (panel) >.............. chg to.......JAckson 1-0001-2499 and JA 2-2500-9999
                                MAin (panel)     >................................MUrray 8-
                                LAmar (step-by-step)..........................JAckson 4-
                                ALpine (SxS)).....................................JAckson 5-
                                CYpress (SxS)....................................JAckson 3-
                                OFficial..............................................MUrray 5-                                  

Brookwood (Midtown): Crescent Ave. at 10th St.
"HEmlock" (manual)
                                 VErnon (SXS)......................................TRinity 2-
                                 ATwood (SxS).....................................TRinity 4-
                                 ELgin (SxS).........................................TRinity 6-
                                 EMerson (SxS).....................................TRinity 5-

Buckhead:                   (SxS)
                                 CHerokee.............................................CEdar 3-
                                 EXchange.............................................Cedar 7-

Decatur:                      (SxS)
"Decatur"                     DEarborn..............................................DRake 3-
                                  EVergreen............................................ DRake 8-

West End                      (SxS)
"West".........................RAymond...............................................PLaza 3-
                                  FRanklin.................................................PLaza 8-
                                  AMherst.................................................PLaza 5-

East Point                     (SxS 1931)
"East Point"..................CAlhoun.................................................POplar 1-
                                   FAirfax...................................................POplar 7-

East Atlanta:                  (SxS)
N/A                               DIxie.....................................................MArket 7-

Hollywood Rd.:
                                    BElmont................................................SYcamore 4-


Toco Hill:                                                                                    (last SxS installed in Atlanta)
N/A..........................................................................................MElrose 4-

Columbia Drive:                                                                          (#5 Crossbar)
N/A......................................................................................... BUtler 9-

Sandy Springs:                                                                             (#5 XB)
N/A..........................................................................................BLackburn 5-

Fairburn Rd.                                                                                 (5XB)
N/A..........................................................................................DIamond 4-

References:
Atlanta Telephone directories and
www.atlantatelephonehistory.info

Title: Re: Central Office Names
Post by: AMCer on May 20, 2013, 12:42:09 PM
I remember my grandmother's metal dial telephone had the exchange name on it and when it was changed out (to a plastic dial (in the 70s)), she just had the numbers.

I THINK it was "COlony 6" was the exchange name they were using for the 266 prefixes but I know that
     AMherst
     ANdrew
     COlfax
     COlony
     COngress

     ...were are all acceptable names.

I'm wondering if anyone knows for sure what the Richmond/Henrico 266 exchange was 'officially' called in the 50s and 60s.
Title: Re: Central Office Names
Post by: jsowers on May 20, 2013, 03:13:18 PM
Quote from: AMCer on May 20, 2013, 12:42:09 PM
I remember my grandmother's metal dial telephone had the exchange name on it and when it was changed out (to a plastic dial (in the 70s)), she just had the numbers.

I THINK it was "COlony 6" was the exchange name they were using for the 266 prefixes but I know that
     AMherst
     ANdrew
     COlfax
     COlony
     COngress

     ...were are all acceptable names.

I'm wondering if anyone knows for sure what the Richmond/Henrico 266 exchange was 'officially' called in the 50s and 60s.

The Exchange Name Project does list COlony for Richmond, VA. They also list BOulevard, which is a very old one. Another poster to the project says that COlony replaced ELgin for the area north of Richmond city limits in the late 50s or early 60s.

Here is the link to that site...

http://rcrowe.brinkster.net/tensearch.aspx (http://rcrowe.brinkster.net/tensearch.aspx)
Title: Re: Central Office Names
Post by: AMCer on May 20, 2013, 03:20:50 PM
My grandparents built their house in 1956 and that is when they got assigned the telephone number. So it would have been after BOulevard (probably).  I really think it was COlony.

I'm happy to report that I have twice saved the number from being reassigned and thanks to VOIP, I use it now.  In 2016 my family will have had the same number for 60 years.
Title: Re: Central Office Names
Post by: jsowers on May 20, 2013, 03:28:22 PM
Also, here are the New York City exchanges from 1951, from something I posted a while back. If you scroll up, you will see New Jersey too, also from 1951.

http://www.classicrotaryphones.com/forum/index.php?topic=5886.msg70654#msg70654 (http://www.classicrotaryphones.com/forum/index.php?topic=5886.msg70654#msg70654)

This includes what may be my favorite exchange of all time, just because it's so obscure. SChuyler 4. Most people would want to spell that with SK instead of SC. I have a 202 with a SChuyler 4 number card (see below). I'm fairly sure it's pronounced "skyler" and not "shuler."

About having the same number for 60 years, my aunt, who's 96, has had the same phone number for about 58 years, and the same area code since the inception of area codes. But she no longer has the 302. They converted everything to Touch-Tone about 1973.
Title: Re: Central Office Names
Post by: poplar1 on May 20, 2013, 03:31:49 PM
I almost always have trouble with the TEN site. Under COlony and Colony, I don't see Richmond, VA. Under Richmond, VA and Richmond, Va I don't see Colony or COlony. 26- is not even on the numerical list. I did see BOulevard under Richmond, Va. What am I doing wrong?
Title: Re: Central Office Names
Post by: jsowers on May 20, 2013, 04:02:37 PM
Quote from: poplar1 on May 20, 2013, 03:31:49 PM
I almost always have trouble with the TEN site. Under COlony and Colony, I don't see Richmond, VA. Under Richmond, VA and Richmond, Va I don't see Colony or COlony. 26- is not even on the numerical list. I did see BOulevard under Richmond, Va. What am I doing wrong?

I get four pages when searching on Richmond in the City and VA in the state and COlony is on page 3 at the bottom. You should have a 1234 at the bottom center in the blue border and those are extra pages in the search.

I agree it's a clumsy search engine. And yes, 26 isn't on the numerical list. It's clumsy at best.
Title: Re: Central Office Names
Post by: AMCer on May 20, 2013, 04:08:31 PM
According to here:
http://ourwebhome.com/TENP/Recommended.html

In 1955 Bell publish a list of acceptable names (COlony is in there).  That would be 1 year before we got our number.

And I VAGUELY remember the old metal dial telephone with the name on it. (Honestly, I like BOulevard better)
Title: Re: Central Office Names
Post by: poplar1 on November 19, 2013, 12:19:14 AM
Montréal, Québec Exchange

http://www.jbb.poslfit.com/Pages/514.html

From the above site:

From 1925 to 1958, 2 Letter 4 Digit (2L-4D) dialing was used in Montréal. Here are the old prefixes for the Montréal exchange.



2 Letter 4 Digit Prefix            Replaced by                                       Date

86–UNiversity                       86–UNiversity 6                                 1951-05-06 
[new]                                    48–HUnter 8                                     1952-06 
[new]                                    73–REgent 3                                     1952-06 
[new]                                    74–RIverside 4                                  1952 
[new]                                    76–POntiac 6                                     1952 
[new CO]                               72–RAymond 2                                  1953-04 
38–DUpont                            38–DUpont 8                                    1953-07-26 
39–EXdale                             73–REgent 7                                   1954-02 
28–ATlantic                            73–REgent 8                                    1954-02 
52–LAncaster                        28–AVenue 8                                  1954-07-25 
26–AMherst                           52–LAfontaine 1                             1955-07-31 
24–CHerrier                           52–LAfontaine 2                            1955-07-31 
37–FRontenac                        52–LAfontaine 3                            1955-07-31 
32–FAlkirk                              52–LAfontaine 4                             1955-07-31 
46–HOchelaga                       52–LAfontaine 5                             1955-07-31 
44–GIffard                              52–LAfontaine 6                            1955-07-31 
29–BYwater                            74–RIverside 7                              1955-07-31 
25–CLairval                            25–CLairval 5                                 1956-08-05 
88–TUrcotte                            25–CLairval 9                                 1956-08-05 
36–DOllard                              27– CRescent 1                              1956-08-05 
22–CAlumet                             27–CRescent 2                              1956-08-05 
47–GRavelle                            27–CRescent 4                             1956-08-05 
84–VIctoria                              27–CRescent 6                             1956-08-05 
27–CRescent                           27–CRescent 7                              1956-08-05 
82–TAlon                                  27- CRescent 9                              1956-08-05 
92–WAlnut                               48–HUnter 1                                    1957-03 
83–VEndome                           38–DUpont 7                                 1957-08-04 
43–HEmlock                             76–POntiac 7                              1957-08-04 
87–TRenmore                          76–POntiac 8                              1957-08-04 
96–YOrk                                   76–POntiac 9                               1957-08-04 
42–HArbour                              84–VIctor 5                                1957-08-04 
62–MArquette                          84–VIctor 9                                 1957-08-04 
94–WIlbank                             93–WEllington 2                         1957-08-04 
93–WEllington                        93–WEllington 3                          1957-08-04 
34–FItzroy                              93–WEllington 5                         1957-08-04 
45–GLenview                          93–WEllington 7                        1957-08-04 
75–PLateau                            84–VIctor 2                               1958-09-21 
23–BElair                                84–VIctor 4                                1958-09-21 
35–ELwood                           48–HUnter 6                               1958-09-21 
33–DExter                              48–HUnter 7                              1958-09-21 
[new CO]                               36–DOminic                                1958-07 
[new CO]                               32–DAniel                                   1958-10 
[new CO]                               33–FEderal                                 1959-07 
Title: Re: Central Office Names
Post by: tallguy58 on November 19, 2013, 08:01:53 AM
Well, my dad bought our house in Cote-St-Luc in 1957 and when they got a phone the number was  HU9-1005. The house was brand new in a new development. All my friends had Hunter #'s as well. I find they're easier to remember. Obviously... I still remember it.
Title: Re: Central Office Names
Post by: poplar1 on November 19, 2013, 08:18:23 AM
So would that be the Monkland wire centre?

The 2 Letter 5 Digit column shows current assignments of the 2L-5D named prefixes that have existed since the 1950s. Some wire centre boundaries and prefixes have changed over time. Most central offices now use additional prefixes.

CO CLLI     Rate Centre Wire Centre 2 Letter 5 Digit Prefix

MTRLPQ02  Montréal  Belmont  86–UNiversity 1-4-6-8, 87–TRiangle 
MTRLPQ03  Montréal  Cadillac  25–CLairval 
MTRLPQ05  Montréal  Pointe-aux-Trembles  64–MIssion 0-2-4-5 
MTRLPQ07  Montréal  Papineau  52–LAfontaine 
MTRLPQ08  Roxboro   68–MUrray 3-4-5 
MTRLPQ19  Montréal  Côte-des-Neiges  73–REgent 
MTRLPQ23  Montréal  Dudemaine  33–FEderal 
MTRLPQ24  Montréal  Decelles  74–RIverside [merged with Dudemaine in the 1990s] 
MTRLPQ28  Montréal  St-Dominique  27–CRescent 
MTRLPQ29  Montréal  Montée St-Michel  72–RAymond 
MTRLPQ30  Montréal  Montréal-Nord  32–DAniel 
MTRLPQ31  Montréal  Sauvé  38–DUpont 
MTRLPQ34  Montréal  Rivière-des-Prairies  64–MIssion 3-8 (was 66–MOnument 5) 
MTRLPQ42  Montréal  Ontario  84–VIctor, 28–AVenue 
MTRLPQ43  Montréal  Atwater  93–WEllington 
MTRLPQ44  Lachine  14e Avenue  63–MElrose 4-7-9 (was 63–NElson 5) 
MTRLPQ45  Lachine  Dorval  63–MElrose 1-3-6 
MTRLPQ46  Montréal  LaSalle  36–DOminic 
MTRLPQ47  Montréal  Monkland  48–HUnter  
MTRLPQ48  Montréal  Verdun  76–POntiac 
MTRLPQ50  Pointe-Claire  Chemin St-Jean 69–OXford 3-4-5-7 (was 68–OVerbrook) 
MTRLPQ51  Montréal  Anjou  35 
MTRLPQ53  Pointe-Claire  Ste-Anne-de-Bellevue  45–GLendale 7 
MTRLPQ54  Ste-Geneviève   62–NAtional 0-4-6 
IPRTPQAA  Île-Perrot   45–GLendale 3 


http://www.jbb.poslfit.com/Pages/514.html
Title: Re: Central Office Names
Post by: tallguy58 on November 19, 2013, 09:41:15 AM
Here's a pic of the Monkland Exchange building at 6055 Monkland Ave in Montreal.

Used to be called the Elmwood Exchange building. Built in 1928.

Still used I guess. Has Bell logo on it.


Title: Re: Central Office Names--Baltimore City
Post by: poplar1 on January 02, 2014, 03:24:05 PM
Baltimore, MD changed from 2 letters+ 4 numbers to 2L 5N effective May 16, 1953:


Title: Re: Central Office Names--Baltimore City
Post by: poplar1 on January 02, 2014, 03:38:48 PM
It seemed strange that in each case, a numeral other than 1 was added to the existing Baltimore central office name. On closer inspection, the choice of number in each case is the one corresponding to the third letter of the office name: for example, for BElmont, 5 was chosen and L on the dial would be 5. For TUxedo, 9 was chosen and X on the dial would be 9.

Only Boston, New York City, Philadelphia and Chicago actually dialed 3 letters of the phone number (PENnnsylvania xxxx,  HAYmarket xxxx). These were the only cities large enough to need the equivalent of 7-digit phone numbers. When they changed from 3 letters + 4 numerals to 2L 5N in these four cities, the third letter changed to the corresponding numeral: PENnsylvania 5000 became PEnnsylvania 6-5000. So no changes to the central offices were needed for that change.
Title: Re: Central Office Names
Post by: tallguy58 on January 02, 2014, 05:56:21 PM
From the Montreal gazette Sept 20, 1958
Title: Re: Central Office Names--Philadelphia
Post by: poplar1 on December 31, 2014, 10:26:17 PM
List of "offices" attached to the bottom of a 302. Note that AT&T called them "offices" or "central offices", and not "exchanges." Exchange referred to a geographical area,  which might contain one or many offices.

Today some refer to the "offices" as NXXs or prefixes.


Title: Re: Central Office Names
Post by: Mr. Bones on December 31, 2014, 10:35:26 PM
Very cool sticker, Sargeguy!

     Are the the numbers in the RH column prefixes, or area codes? They don't seem to correspond with the exchange names, at a glance. Also the first time, outside of horror movies, etc. that I've seen "666" listed! ;D

     Keep up the great work, Super Sleuth! <(Shades of Brains Benton)> 8) Happy New Year!

Best regards!
Title: Re: Central Office Names
Post by: poplar1 on December 31, 2014, 10:42:53 PM
These NNXs were probably added later, that is, after names were no longer being assigned and phone numbers were (area code +) 7 numerals. Area codes at that time always had 0 or 1 as the middle digit.
Title: Re: Central Office Names
Post by: AE_Collector on December 31, 2014, 10:50:15 PM
Quote from: poplar1 on January 02, 2014, 03:38:48 PM
PENnsylvania 5000 became PEnnsylvania 6-5000.

Can anyone else hear The Glenn Miller Orchestra playing in the ball room of the Pennsylvania Hotel in New York?

Terry

Title: Re: Central Office Names
Post by: Mr. Bones on January 01, 2015, 12:35:07 AM
Quote from: AE_Collector on December 31, 2014, 10:50:15 PM
Quote from: poplar1 on January 02, 2014, 03:38:48 PM
PENnsylvania 5000 became PEnnsylvania 6-5000.

Can anyone else hear The Glenn Miller Orchestra playing in the ball room of the Pennsylvania Hotel in New York?

Terry
I can, literally... shot you 2 PMs, and 2 emails, to your biddlecombe@ addy, only one I have.. Enjoy!

Title: Hotel Pennsylvania PE 6-5000
Post by: unbeldi on April 19, 2016, 07:19:24 PM
Last night, on the occasion of watching the groups Earth, Wind & Fire and Chicago at Madison Square Garden, I stopped by the Hotel Pennsylvania across the street from the Garden, and picked up a business card still showing its famous telephone number, which doesn't need to be repeated.  However, the central office name is gone.

Funny thing was that I had to ask someone to give me one, they don't just leave them sitting on the concierge's desk.

It seems the building will finally be renovated, and not torn down, as the facade of the hotel is now enclosed completely in scaffolding and screens.

The hotel's owners and fans claim that it has the longest in service telephone number in New York City, although the exact date of original service installation appears uncertain. Seven-digit telephone number were first installed in NYC in 1930, when the system was completely reorganized in a 3L-4N numbering plan. The PEnnsylvania central office was the first in NYC to be converted to a 1ESS system in 1969.

All around a nostalgic evening, I suppose.

Title: Re: Central Office Names
Post by: AE_Collector on April 19, 2016, 08:25:51 PM
You would think that they would put both Pennsylvania 6-5000 as well as 736-5000 on the business card. But, I guess there are what...1 in 1000 people left who would "get it" now?

One given is that the CO was NOT SxS when that number was given out. Up 10 and in 10 on a connector switch leaves room for one and only one trunk to their PBX. SxS Trunk hunting or Trunk and Level hunting connectors led to numbers that ended in 1. Pennsylvania 6-5001 or more likely (to allow for more than 10 trunks in total) Pennsylvania 6-5011.

Terry
Title: Re: Central Office Names
Post by: poplar1 on April 19, 2016, 08:38:12 PM
Quote from: AE_Collector on April 19, 2016, 08:25:51 PM
You would think that they would put both Pennsylvania 6-5000 as well as 736-5000 on the business card. But, I guess there are what...1 in 1000 people left who would "get it" now?

One given is that the CO was NOT SxS when that number was given out. Up 10 and in 10 on a connector switch leaves room for one and only one trunk to their PBX. SxS Trunk hunting or Trunk and Level hunting connectors led to numbers that ended in 1. Pennsylvania 6-5001 or more likely (to allow for more than 10 trunks in total) Pennsylvania 6-5011.

Terry
Quote from: AE_Collector on April 19, 2016, 08:25:51 PM
You would think that they would put both Pennsylvania 6-5000 as well as 736-5000 on the business card. But, I guess there are what...1 in 1000 people left who would "get it" now?

One given is that the CO was NOT SxS when that number was given out. Up 10 and in 10 on a connector switch leaves room for one and only one trunk to their PBX. SxS Trunk hunting or Trunk and Level hunting connectors led to numbers that ended in 1. Pennsylvania 6-5001 or more likely (to allow for more than 10 trunks in total) Pennsylvania 6-5011.

Terry

Terry, I don't think NY City ever had any SxS, only 1XB, 5XB and ESS--though possibly DMS and others now?
Title: Re: Central Office Names
Post by: AE_Collector on April 19, 2016, 08:47:04 PM
Not that I have any idea at all, but I too doubt there would have been any SxS in the city. But, you left Panel off the list of old technologies. 5ESS now as well as DMS pobably.

Terry
Title: Re: Central Office Names
Post by: xhausted110 on April 20, 2016, 12:41:23 AM
There was no step in New York City, except for "Centrex CU" and private pbx's. PEnnslyvania 6 was panel until the installation of the #1 ESS, and is now a 5ESS.
Title: Re: Central Office Names
Post by: rdelius on April 20, 2016, 09:39:59 AM
I thought NYC had some Panel switches
Title: Re: Central Office Names
Post by: unbeldi on April 20, 2016, 01:48:03 PM
Penn6 was indeed a Panel system and so were many (most?) exchanges in the city.  Panel was AT&T's solution to high density switching in urban centers and was designed to handle manual offices well, because the big city problem was that it was impossible to convert to dial all at once.

Panel was really the beginning of common control systems, in which the subscriber's dial no longer directly controlled the switching action in the switch—that was left to the Sender units which had digit registers to store the digits for the period that the customer needed until finished dialing, and therefore the switch itself was not tied up for the entire period of dialing.

In a way, the Sender circuit eliminated the job of the operator.
The first Panel exchange was installed in 1915 in Newark, just a few miles from NYC, and Newark is a large office as well.  But being this early, the Newark system did not have the Sender yet, and operators were still needed to get the number from the customer and dial it themselves. The subscribers only had manual telephones.

Panel could also handle seven digits from the beginning, but the seventh digit was the party line letter. I think this was extended to eight digits, when the system was changed to 3L-4N (in 1930?).

As mentioned earlier, indeed, NYC also had a lot of Crossbar systems, in fact the first installation of the No. 1 Crossbar was in Brooklyn in ca. 1937.

As AT&T was apparently slow to roll out the 5ESS line, NYC has a lot of DMS systems still installed, DMS-100, DMS-10, and I think I have seen listed DMS-500 switches as well.

Title: Re: Central Office Names
Post by: xhausted110 on April 20, 2016, 02:46:28 PM
Back on the subject of exchange names, here's an advertisement card from Chicago for a phone booth. Interesting that the police and fire departments had their own exchanges. Also note that this is from before DDD or TSPS, "long distance- 211"
Title: Re: Central Office Names
Post by: unbeldi on May 07, 2016, 12:15:26 PM
I believe the following came from a cover of a Chicago telephone phone book, I don't have the original source.

1959 Chicago's Exchange Names



Title: Re: Central Office Names
Post by: jsowers on May 07, 2016, 03:07:02 PM
Notice how they're called "exchange names" and not central office names.

Chicago had some unique ones like New York City. The list is very nice to see. I don't think I had ever heard of INterocean 8 before. I remember HAymarket 1 from the cover of the 1956 Allied Electronics Catalog I have.

They devoted one name for fire and another for police, in those days before 911, and 1313 were the last four digits for both. I wonder how they came up with that, and not 1111 or 1212 or 2368?
Title: Re: Central Office Names
Post by: unbeldi on May 07, 2016, 06:41:00 PM
I thought that would tickle a bone,  :o
Yes, Chicago seems to not have followed the directives from the Central Office at West Street or Broadway, NYC, or thereabouts.

I also have another list of the Chicago exchanges from another telephone book and that page is also entitled with the term 'exchange'.

Starting with the design documents of the North American Numbering Plan in the mid 1940s, the official documents adopted the term 'central office' pretty consistently.  Out in the 'territories' this was not always so.

Interestingly, I recall reading some article that explained that the first telephone exchange in Chicago in ca. 1880, was called the Central Office.  When the next two exchanges opened they were referred to as Branches. Within a short time due to rapid growth, they were soon all simply numbered.




Title: Re: Central Office Names
Post by: Mr. Bones on May 07, 2016, 07:23:31 PM
Quote from: unbeldi on May 07, 2016, 06:41:00 PM
I also have another list of the Chicago exchanges from another telephone book and that page is also entitled with the term 'exchange'.

I think that we would all love to see that, if you'd be so kind as to share a scan, photo, usw. 8)

Many thanks, in advance, Karl!

Best regards!
Title: Re: Central Office Names
Post by: unbeldi on May 07, 2016, 07:51:11 PM
Quote from: Mr. Bones on May 07, 2016, 07:23:31 PM
I think that we would all love to see that, if you'd be so kind as to share a scan, photo, usw. 8)

Many thanks, in advance, Karl!

Best regards!


Here it is.  The quality is rather poor.  But with some effort it can be useful too.
It is quite possible that this page came out of the same phone book, but I don't know.  Certainly it is approximately the same time frame.

I also found the article I was referring to earlier:
William D. Caughlin, Evolution of Local Telephone Numbers in Chicago (http://www.classicrotaryphones.com/forum/index.php?action=dlattach;topic=9430.0;attach=141652),  2004-02-27
Title: Re: Central Office Names
Post by: unbeldi on May 07, 2016, 08:25:16 PM
I have a 1942 telephone directory from nearby Naperville, just west of Chicago, and the directory uses the term 'central office'.  It was issued by Ill.Bell.Tel.Co.

It appears that Naperville had a manual system at the time.  All numbers are simply prefixed with the name Naperville, and many carry party line suffix letters.

From the page 'Regulations':

Telephone Numbers.—The subscriber has no property
right in the telephone number or any right to continuance
of service through any particular central office.
The Telephone Company may change the telephone
number or the central office designation, or both, of
a subscriber whenever it deems it desirable in the
conduct of its business so to do.
Title: Re: Central Office Names
Post by: DaveCook on March 11, 2022, 11:05:35 PM
Quote from: jsowers on May 20, 2013, 03:28:22 PM
Also, here are the New York City exchanges from 1951, from something I posted a while back. If you scroll up, you will see New Jersey too, also from 1951.

http://www.classicrotaryphones.com/forum/index.php?topic=5886.msg70654#msg70654 (http://www.classicrotaryphones.com/forum/index.php?topic=5886.msg70654#msg70654)

This includes what may be my favorite exchange of all time, just because it's so obscure. SChuyler 4. Most people would want to spell that with SK instead of SC. I have a 202 with a SChuyler 4 number card (see below). I'm fairly sure it's pronounced "skyler" and not "shuler."

The 1957 I Love Lucy episode "Lucy Gets Chummy with the Neighbors" confirms your pronunciation, Jonathan. When Lucy calls Ethel for help (after spending much more on new furniture that Ricky had budgeted for), she picks up the phone, dials 0, and says, "Operator, may I have SChuyler 4 8098, New York City, please." That SChuyler 4 (724) telephone exchange, as it happens, is different from the MUrray Hill 5 and CIrcle 7 exchanges of Lucy and Ricky's former telephone numbers, even though the Ricardos and the Mertzes lived in the same apartment building.
Title: Re: Central Office Names
Post by: Babybearjs on March 12, 2022, 01:12:15 AM
I would love to get the original CO names for Boise, ID. currently I have the ES7 prefix (ESsex7), if that's the right name...  and the area has been populated since the 1950's. it would be neat to see the list for Boise, if it exists. since the area dates back to the 1950's, its possible that the list expired before the phone service was established in this part if Boise...
Title: Re: Central Office Names
Post by: 5415551212 on May 08, 2022, 02:17:26 PM
Quote from: Babybearjs on March 12, 2022, 01:12:15 AMI would love to get the original CO names for Boise, ID. currently I have the ES7 prefix (ESsex7), if that's the right name...  and the area has been populated since the 1950's. it would be neat to see the list for Boise, if it exists. since the area dates back to the 1950's, its possible that the list expired before the phone service was established in this part if Boise...
I bet the university of Idaho might have some old phone books in their Library archives.
Title: Re: Central Office Names
Post by: Jim Stettler on May 08, 2022, 04:45:15 PM
Quote from: Babybearjs on March 12, 2022, 01:12:15 AMI would love to get the original CO names for Boise, ID. currently I have the ES7 prefix (ESsex7), if that's the right name...  and the area has been populated since the 1950's. it would be neat to see the list for Boise, if it exists. since the area dates back to the 1950's, its possible that the list expired before the phone service was established in this part if Boise...

Here  is a list of Bell System suggested exchange names.
https://puzzles.mit.edu/2012/puzzles/phantom_of_the_operator/solution/Telephone_EXchange_Names.html


Jim
Title: Re: Central Office Names
Post by: SUnset2 on May 09, 2022, 02:11:50 AM
Jim,
The list you posted the link to was used as recommendations for new exchanges.  Older exchanges were often named for local landmarks, and are not on that list.
Finding old telephone directories is the best way to know for sure.  Public libraries often have sets of them.
Title: Re: Central Office Names
Post by: MMikeJBenN27 on May 09, 2022, 01:00:39 PM
Maybe now, with trends so important, bringing back exchange names might get more people to keep their home phones.

Mike