informis/textfiles
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
textfiles/phreak/SWITCHES/switch.txt

230 lines
10 KiB
Plaintext
Raw Normal View History

Initial commit
2021-04-15 13:31:59 -05:00
WARNING........
THE FOLLOWING FILE IS NOT FOR THE NOVICE IN PHREAKING. YA WANT TO KNOW HOW TO
GET YERSELF LD CODES, GO BOTHER YER LOCAL HACK/PHREAK BOARD FOR THAT.
NOW THEN........
<-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><->
<-> <->
<-> The Phreaker's Guide to <->
<-> ESS1 & 1A Switching Systems <->
<-> <->
<-> Researched and Compiled by <->
<-> -=+NINJA MASTER+=- <->
<-> <->
<-> 5/10/87 <->
<-> _______ <->
<-> File #1 <->
<-> ------- <->
<-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><->
<-> "Forever Servicing The Phreak/Hack Community" <->
<-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><->
Hello, and welcome to the first in a continuing series on the ESS1 and 1A
switching systems. The information in this series had been obtained from my
knowledge and by trashing various empire (AT&T,BELL) trash binns.
In this first file I will start off with a very basic review of what the
ESS system is, and will then go on to talk about some other things you
will find interesting.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
The ESS System In Review
------------------------
ESS (Which stands for Electronic Switching System) was designed by good old AT&T
in the state of the art labs of the computer-controlled space-division. The
principle is simple, you have a switching system that is controlled by simple
electronics and stored computer programs. (not to be confused with CCIS which is
just a interoffice command link).
The ESS system is a class 5(End Office) system, and has some spinoffs (like the
No. 10A RSS [Remote Switching System]). It uses digital transmissions, although
they must be converted to analog by a hybrid as this is what kind of electronics
AT&T chose to use.
The ESS is divided in to seperate modules, so as to make repairs and additions
easier. Each module is connected to the system by interfaces (one of which will
be covered later). In a whole, the ESS system provides the standard BORSCHT
functions, plus some extra ones.
Well, them there's the basics, now on with the good, technical, informational,
fun stuff.........
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
ESS1A Procesor
--------------
The follwing is about the 1A Processor, and will give you an understanding on
how it functions.
The 1A processor is used for a number of ESS systems, but most specifically is
used for the following:
o To control the 4 ESS switch.
o To control the 1A ESS switch.
o To be added to older 1 ESS switches, so as to update it to a 1A ESS.
o To support future switching systems.
o To accommodate bulk memory systems.
o And to provide real time and continuous control through highly automatic
maintenance. (less than 2 hours downtime in 40 years continuous operation).
The 1A processor uses stored programs, and operates in a real time environment.
The processor can function without being hooked up to the switching network.
The processor is devoted to internal maintenance and administrative tasks. So
TELCO employe's can monitor the processor (from now on called the 1A) it is
hooked up to control panels and to I/O terminals. (which, incidentally
interface with software defined I/O channels).
All frames (they make up the 1A) sent out from the 1A are duplicated.
So that a failure from one won't screw up and equipment.
The following is a high level block diagram of the 1A:
_________
Attached
Processor_________
System
---------
___________
___________
^ Auxiliary
File Store----< <-------------------*----------------- Data
System
-----------
-----------
AU BUS
___________ ___________________ ____________
Program PS Bus Central CS Bus Call Store
Store --------------- Control -------------
------------
----------- -------------------
PU Bus ___________ Data and
control
*------------ I/O -------------
Interface to/from
I/O
----------- terminals
E2A Telemetry
PU Bus Control
Status
_________ And _______________
Control <---------- Pu Bus To/From
Control ------------------- Periphel --------------------------using
Panels System system
Interface peripheal
---------
E2A Telemetry Control Inhibit
to No. 2 Telemetry Data <----------------------\
SCCS And Control From
Maintenance------------------- <--Office--Alarms-------Using
Facility System
<--Building--Alarms----/
----------------
LEGEND
------
AU--Auxiliary Unit
CS--Call Store
PS--Program Store
PU--Peripheral Unit
SCCS--Switching Control Center System
About the above:
Central Control: Interfaces with the 1A, and performs the processing functions
of the 1A. It also executes all maintenance routines.
Program Store: High speed semiconductor that stores program instructions, and
system configuration system.
Call Store: Similar to the above, but is used for storage translation data, and
frequently changed call processing data, such as:
o Status of trunks and switching network.
o Records of network terminations used for each call in progress.
o Digits received and digits to be outpulsed.
o Maintenance data related to programmed diagnostic tests.
Call store also includes an emergency system recovery program, used to
establish a working system of a program store failure.
File Store: Magnetic disk memory, used for program backup.
Attached Processor System: 3B20D computer, of which one or more are used as
slave processors (used for multitasking, ect.)
Auxillary Data System: Magnetic tape system used to store and retrieve data
such as system reinitialization, memory dumps, ect......
I/O interface: Used to connect 1A to terminals used to input control mesages,
and to recieve status messages.
Peripheral System Interface: Serves as the main junction between all peripherals.
Control Panels: An additional I/O device used to monitor the 1A, and to
exercise manual control over the 1A.
(Yes, this is the big computer you've all seen before,
compleat with blinking lights, and little switches)
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Well, that's it for this file. If anyone wants more detailed info such as
system schematics, address spectrums, ect... then leave me mail on any of the
boards listed at the end of this file.
*Next file: Mobile Bandits (Those good old mobile switching systems).*
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Any comments, questions, ect.... you can reach me on the following boards:
Ripco Crowley Manor Phreak Klass 2600
Skidds Lab Music Playground Pandemonium
[*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*]
[*] A /\/\aster \/\/orks II Presentation [*]
[*] Copyright 1987 [*]
[*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*][*]
DOWNLOADED FROM THE RED PHONE BBS xxx-xxx-xxxx

Reference in New Issue Copy Permalink