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..[ Phrack Magazine ]..
.:: Guide to the 5ESS ::.

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Current issue : #43 | Release date : 1993-07-01 | Editor : Erik Bloodaxe
IntroductionDatastream Cowboy
Phrack Loopback Part IPhrack Staff
Phrack Loopback Part II / EditorialPhrack Staff
Line Noise Part IPhrack Staff
Line Noise Part IIPhrack Staff
Phrack Pro-Phile on Doctor WhoDoctor Who
Conference News Part Ivarious
Conference News Part IIvarious
How To Hack Blackjack (Part I)Lex Luthor
How To Hack Blackjack (Part II)Lex Luthor
Help for Verifying Novell SecurityPhrack Staff
My Bust (Part I)Robert Clark
My Bust (Part II)Robert Clark
Playing Hide and Seek, Unix StylePhrack Accident
Physical Access and Theft of PBX SystemsCodec
Guide to the 5ESSFirm G.R.A.S.P.
Cellular InfoMadjus
LODCOM BBS Archive Informationunknown
LODCOM Sample Messagesunknown
Step By Step Guide To Stealing a CamaroSpy Ace
Acronyms Part IFirm G.R.A.S.P.
Acronyms Part IIFirm G.R.A.S.P.
Acronyms Part IIIFirm G.R.A.S.P.
Acronyms Part IVFirm G.R.A.S.P.
Acronyms Part VFirm G.R.A.S.P.
International Scenevarious
Phrack World NewsDatastream Cowboy
Title : Guide to the 5ESS
Author : Firm G.R.A.S.P.
                            ==Phrack Magazine==

               Volume Four, Issue Forty-Three, File 16 of 27

                   % % % % % % % % % % % % % % % % % % %
                  % % % % % % % % % % % % % % % % % % % %
                 % %                                   % %
                  %            AT$T 5ESS(tm)            %
                 % %        From Top to Bottom         % %
                  %                                     %
                 % %                                   % %
                  %         by: Firm G.R.A.S.P.         %
                 % %                                   % %
                  % % % % % % % % % % % % % % % % % % % %
                   % % % % % % % % % % % % % % % % % % %


   Welcome to the world of the 5ESS.  In this file I will be covering
the switch topology, hardware, software, and how to program the switch.  I
am sure this file will make a few people pissed off <grin> over at BellCORE.
   Anyways, the 5ESS switch is the best (I think) all around switch. Far
better then an NT. NT has spent too much time with SONET and their S/DMS
TransportNode OC48.  Not enough time with ISDN, like AT$T has done. Not only
that, but DMS 100s are slow, slow, slow! Though I must hand it to NT, their
DMS-1 is far better then AT$T's SLC-96.

What is the 5ESS

   The 5ESS is a switch. The first No. 5ESS in service was cut over in Seneca,
Illinois (815) in the early 1982.  This test ran into a few problem, but all
and all was a success.  The 5ESS is a digital switching system, this
advantage was realized in No. 4 ESS in 1976.  The 5ESS network is a TST
(Time Space Time) topology, the TSIs (Time Slot Interchangers) each
have their own processor, this makes the 5ESS one of the faster switches.
Though I hear some ATM switches are getting up there.

5ESS System Architecture & Hardware

                    5ESS SYSTEM ARCHITECTURE

                                               OSS Data Links

                                                  ^ ^    ^
                                                  | |    |
                                                  | |    |
                                            :     v v    v     :
                                            :   -------------  :
                                            :   |           |  :
                                            :   |   Input   |  :
               ...........................  :   |   Output  |====== TTY/CRT
-----------    :                         :  :   | Processor |  :
| Switch  |<===========                  :  :   -------------  :
| Module  |<========] |                  :  :           ^      ..............
-----------    :    v v                  :  :          |                    :
    o          :  =======   ----------   :  :          |       ------------ :
    o          :  | TMS |<->|Message |   :  :          |       |  Main    | :
    o          :  |     |<->|Switch  |<============    |       |  Store   | :
-----------    :  =======   ----------   :  :     |    |       -----.------ :
| Switch  |    :    ^ ^                  :  :     |    |            |       :
| Module  |<========= |                  :  :     v    v            |       :
-----------<===========                  :  :   --------------      |       :
               :.........................:  :   |  3B        |=======       :
                                            :   | Central    |              :
                                            :   | Control    |<=====> Disk! :
                                            :   --------------              :
                                            :                               :


   The 5 ESS is a digital SPC switching system which utilizes distributed
control, a TST switching network and modular hardware and software design.

   The major components are:


    Two 3B20S Processors  (Which equal a 3B20D)

    - Central control and main storage
    - Disk storage for infrequently used programs and data, and main storage
    - The two 3B20S processors are always comparing data, and when one fails
      the other acts in its place.

    Two Input/Output Processors (IOP)

    - Provides TTY and data-link interfaces to the 3B20D Processor, 5ESS
      Network, Master Control Center (MCC), and various Operational Support
      Systems (OSS). Here is a list of the defult TTY (also called

          tty     Channel Name

         ttyA     Master control console (MCC) terminal.
         ttyB     Master control console (MCC) terminal.
         ttyC     Traffic report printer
         ttyJ     supplementary trunk and line work station (STLWS) terminals
         ttyK     supplementary trunk and line work station (STLWS) terminals
         ttyL     supplementary trunk and line work station (STLWS) terminals
         ttyM     supplementary trunk and line work station (STLWS) terminals
         ttyN     supplementary trunk and line work station (STLWS) terminals
         ttyO     supplementary trunk and line work station (STLWS) terminals
         ttyP     Repair service bureau - Recent change and verify (RSB-RCV)
         ttyR     Office records printer
         ttyQ     Switching control center-recent change and verify (SCC-RCV)
         ttyR     Repair service bureau-automatic line insulation testing
                   (RSB-ALIT) terminal.
         ttyS     Switching control center-recent change and verify (SCC-RCV)
         ttyT     Switching control center-recent change and verify (SCC-RCV)
         ttyU     Belt line B
         ttyV     Local recent change and verify (RCV) terminal
         ttyW     Remote recent change and verify (RCV) terminal.
         ttyY     Network administration center (NAC) terminal.
         ttyZ     The switching control center (SCC) terminal.
         ttyi     SLC(R) carrier maintenance
         ttyj     STLWS - fifth of six
         ttyk     STLWS - sixth of six
         ttyl     STLWS - first of six
         ttym     STLWS - second of six
         ttyn     STLWS - third of six
         ttyo     STLWS - fourth of six
         ttyp     RCV/Repair Service Bureau
         ttyq     RCV/Network Administration Center
         ttyr     ALIT/Repair Service Bureau
         ttys     Maintenance
         ttyt     Maintenance
         ttyu     Belt line A
         ttyv     Local RC/V
         ttyw     Remote RC/V
         ttyx     Maintenance Control Center/Switching Control Center System
         ttyy     Maintenance Control Center/Switching Control Center System
         ttyz     Maintenance Control Center/Switching Control Center System

         FILE     Destination file name in /rclog partition

         mt00     High-density tape device, rewind after I/O
         mt04     High-density tape device, does not rewind after I/O
         mt08     Low-density tape device, rewind after I/O
         mt0c     Low-density tape device, does not rewind after I/O
         mt18     Low-density tape device, rewind after I/O
         mt1c     Low-density tape device, does not rewind after I/O
         mttypc0  Special tape device, IOP 0, rewind after I/O
         mttypc1  Special tape device, IOP 1, rewind after I/O.

     Two Automatic Message Accounting (AMA) units

     - Uses data links to transport calling information to central revenue
       accounting office and AMA tape. Here is the basic structure AMA
       structure for the OSPS model.

         - Called customer's telephone number, either a
            seven- or ten-digit number
         - Calling customer's telephone number, seven digits
         - Date
         - Time of day
         - Duration of conversation.


    Message Switch (MSGS)

    - Provides for control message transfer between the 3B20D Processor and
      Interface Modules (IM's)
    - Contains the clock for synchronizing the network.

    Time Multiplexed Switch (TMS)

    - Performs space division switching between SM's
    - Provides permanent time slot paths between each SM and the MSGS
      for control messages between the Processor and SM's (or between SM's)

    Switching Module (SM)

    - Terminates line and trunks
    - Performs time division switching
    - Contains a microprocessor which performs call processing function
      for the SM

                    5ESS - SWITCH MODULE

                                          |            |
                                          |   SMPU     |
                       ---------          |            |
                       |       |   (64)   |            |
Analog Sub Lines <---->|  LU   |<-------->|            |
                       |-------|          |            |
                       |       |   (64)   |            |
Analog Trunk Lines <-->|  TU   |<-------->|            |   (256)
                       |-------|          |    TSIU    |<--------> NCT
                       |       |          |            |           Links
                       |       |   (128)  |     512    |           to
SLC-96 Remote <------->| DCLU  |<-------->|    Time    |<--------> TMS
                       |       |          |    Slots   |
                       |-------|          |            |
                       |       |          |            |
                       |       |          |            |
                       |       |          |            |
                       |       |   (256)  |            |
T1 Lines   <---------->| DLTU  |<-------->|            |
                       |       |          |            |
                       |       |          |            |
                       |       |          |------------|
                       ---------          |            |
                                          |    DSU     |


    Switch Module Processor Unit (SMPU)

    - Contains microprocessors which perform many of the call processing
      functions for trunks and links terminated on the SM.

    Time Slot Interchange Unit (TSIU)

    - 512 time slot capacity
    - Connects to the TMS over two 256-time slot Network Control and Timing
      (NCT) links.
    - Switches time slots from Interface Units to one of the NCT links (for
      intermodule calls).
    - Switches time slots from one Interface Unit to another within the SM
      (for intramodule calls).

    Digital Service Unit (DSU)

    - Local DSU provides high usage service circuits, such as tone decoders
      and generators, for lines and trunks terminated on the SM.
    - Global DSU provides low usage service circuits, such as 3-port
      conference circuits and the Transmission Test Facility, for all lines
      and trunks in the office (requires 64 time slots).

    The SM may be equipped with four types of Interface Units:

    Line Unit (LU)

    - For terminating analog lines.
    - Contains a solid-state two-stage analog concentrator that provides
      access to 64 output channels. The concentrator can be fully equipped to
      provide 8:1 concentration or can be fully equipped to provide 6:1 or 4:1
    - Each TU requires 64 time slots.

    Trunk Unit (TU)

    - For terminating analog trunks.
    - Each TU requires 64 time slots.

    Digital Line Trunk Unit (DLTU)

    - For terminating digital trunks and RSM's.
    - Each fully equipped DLTU requires 256 time slots.
    - A maximum of 10 DSls maybe terminated on one DLTU.

   The SM may be equipped with any combination of LU's, TU's, DCLU's and DLTU's
totaling 512 time slots.

5ESS System Software

   The 5ESS is a UNIX based switch. UNIX has played a large part in
switching systems since 1973 when UNIX was use in the Switching Control Center
System (SCCS).  The first SCCS was a 16 bit microcomputer. The use of
UNIX for SCCS allowed development in C code, pseudo code, load test,
structure and thought. This led the development of the other switching systems
which AT$T produces today (such at System 75, 85, 1AESS AP, and 5ESS).
NOTE: You may hear SCCS called the "mini" sometimes
   The 5ESS's /etc/getty is not set up for the normal login that one would
expect to see on a UNIX System. This is due to the different channels that
the 5ESS has. The some channels are the TEST Channel, Maintenance Channel,
and RC Channel (which will be the point of focus). Once you are on one
channel you can not change the channel, as someone has said " it is
not a TV!" You are physically on the channel you are on.

Test Channel

   The TEST channel is where one can test lines, and test the switch itself.
This is where operating support systems (such as LMOS) operate from.
This channel allows one to monitor lines via the number test trunk aka
adding a third trunk), voltage test and line seizure.
Here is a list of OSSs which access the test channels on the 5ESS.

 Group                    Operating Support Systems

 Special Service Center
                          SMAS via NO-Test
                          SARTS (IPS)
                          NO-TEST trunk (from the switch)
                          17B and 17E test boards (CCSA net using X-Bar)

 Repair Service Bureau
                          LMOS (IPS)

SCC Channel

   The SCC channel is where the SCC looks and watches the switch 24 hours a day,
seven days a week! From this channel one can input RC messages if necessary.
A lot of people have scanned these out, and though they were AMATs.  Well this
is in short, WRONG! Here is a sample buffering of what they are finding.


   S570-67 92-12-21 16:16:48 086901 MDIIMON BOZOVILL DS0
A  REPT MDII WSN  SIGTYPE DP            TKGMN 779-16    SZ 21   OOS 0
     SUPRVSN RB  TIME 22:16:48  TEN=14-0-1-3-1  TRIAL 1 CARRFLAG NC     ID

   S4C0-148963487 92-12-21 16:17:03 086902 MAIPR BOZOVILL DS0

   S570-67 92-12-21 16:17:13 086903 S0 BOZOVILL DS0
     UNIT                       MTCE STATE       ACTIVITY  HDWCHK  DGN RESULT
     LUCHAN=5-0-0-3-4           OOS,AUTO,FE      BUSY      INH        CATP
     LUCHAN=5-0-0-2-5           OOS,AUTO,FE      BUSY      INH        ATP
     LUCHAN=5-0-0-0-3           OOS,AUTO,FE      BUSY      INH        ATP
     LUCHAN=5-0-0-3-5           OOS,AUTO,FE      BUSY      INH        ATP
     LUHLSC=5-0-0-1             OOS,AUTO,FE      BUSY      INH        ATP
     LUCHAN=5-0-0-0-2           OOS,AUTO,FE      BUSY      INH        CATP
     LUCHAN=5-0-0-3-6           OOS,AUTO,FE      BUSY      INH        ATP
     LUCHAN=5-0-0-1-4           OOS,AUTO,FE      BUSY      INH        ATP

   S570-983110 92-12-21 17:09:53 144471 TRCE WCDS0
     DN 6102330000  DIALED    DN 6102220001
     TIME 17:09:52


  This has nothing to do with AMA, this is switch output on say the SCC
channel.  This is used by the SCCS for logging, and monitoring of alarms.
The whole point of this channel is to make sure the switch is doing what it
should do, and to log all activity on the switch. NOTHING MORE!
   To go into these messages and say what they are would take far too long,
order the OM manuals for the 5ESS, watch out, they are about 5 times the size of
the IM (input manual) set.  On average it takes someone three years of training
to be able to understand all this stuff, there is no way anyone can write a
little file in Phrack and hope all who read it understand everything about the

RC Channel

   The RC/V (Recent Change/Verify) Channel is where new features can be added or taken
away from phone lines. This is the main channel you may come in contact with,
if you come in contact with any at all. When one connects to a 5ESS RC/V channel
one may be dumped to a CRAFT
shell if the login has not been activated.  Access to the switch when the
login is active is controlled by lognames and passwords to restrict
unwanted entry to the system.  In addition, the SCC (Switching Control
Center) sets permission modes in the 5ESS switch which control the RC
(recent change) security function.
   The RC security function determines whether recent changes may be made
and what types of changes are allowed.  If a situation arises where the RC
security function denies the user access to recent change via RMAS or RC
channels, the SCC must be contacted so that the permission modes can be
modified.  (Hint Hint)
   The RC security function enables the operating telephone company
to decide which of its terminals are to be allowed access to which
set of RC abilities.  NOTE that all verify input messages are always
allowed and cannot be restricted, which does not help too much.
     The RC security data is not part of the ODD (office dependent data).
Instead, the RC security data is stored in relatively safe DMERT operating
system files which are only modifiable using the following message:


where: aaaaa = Symbolic name of terminal in double quotes
          H' = Hexadecimal number indicator in MML
       bbbbb = 5-character hexadecimal field in 5E4 constructed
               from binary bits corresponding to RC ability.
               The field range in hexadecimal is from 00000 to

     This message must be entered for each type terminal (i.e.
               "aaaaa"="rmas1", "rmas2", etc., as noted above in
                TTY explanations).

NOTE: Order IM-5D000-01 (5ESS input manual) or OM-5D000-01 (5ESS output manual)
for more information on this and other messages from the CIC at 1-800-432-6600.
You have the money, they have the manuals, do not ask, just order.  I
think they take AMEX!

     When the message is typed in, a DMERT operating system file is created
for a particular terminal.  The content of these files, one for each terminal,
is a binary field with each bit position representing a unique set of RC
abilities.  Conversion of this hexadecimal field to binary is accomplished
by converting each hexadecimal character to its equivalent
4-bit binary string.

        0     0000  |  4     0100  |  8     1000  |  C     1100
        1     0001  |  5     0101  |  9     1001  |  D     1101
        2     0010  |  6     0110  |  A     1010  |  E     1110
        3     0011  |  7     0111  |  B     1011  |  F     1111

Each bit position corresponds to a recent change functional area.
  A hexadecimal value of FFFFF indicates that all bit positions are
set to 1 indicating that a particular terminal has total RC access.  Also,
verify operations as well as lettered classes are not included in the
terminals security scheme since all terminals have access to verify views
and lettered classes.
  In addition, maintenance personnel are able to verify the security
code for any terminal by typing the following message from either
the MCC (Master Control Center) or SCCS (Switching Control Center System)
Mini terminal:


where: xxxxx = symbolic name of terminal in double quotes.

Each bit position corresponds to a recent change functional area.

  To ensure redundancy, DMERT operating system files are backed up
immediately on disk by the SCC.
  The input message that defines the password and CLERK-ID (another name for
username) is in the Global RC feature.  This input message defines a clerk-id
and associated password or deletes an existing one. (Recall that CLERK-ID and
PASSWORD are required fields on the Global RC Schedule view 28.1 in
RCV:MENU:APPRC, but more on this later)

This new input message is as follows:


Note: CLERKID  can be from 1 to 10 alphanumeric characters and
      PASSWORD from 1 to 8 alphanumeric characters.

This input message can only be executed from the MCC or SCCS
terminals, and only one password is allowed per CLERK-ID.  To
change a clerk-id's password, this message is used with the same
CLERK-ID but with a different password.

Global RC Schedule View 28.1 from the RC/V Recent Change Menu System

                          5ESS SWITCH  WCDS0
                          RECENT CHANGE  28.1

*1. GRC NAME   __________
*2. SECTION    _____
#3. CLERK ID   __________
#4. PASSWORD   ________
 5. MODE       _______
 6. RDATE      ______
 7. RTIME      ____
 8. SPLIT      _
 9. SPLIT SIZE _____
10. MAX ERRORS _____
11. VERBOSE    _


When the security is set up on the RC/V channel, one will see:


5ESS login

15       WCDS0                    5E6(1)                   ttsn-cdN TTYW

Account name:


There are no defaults, since the CLERK-ID and the password are set by craft,
but common password would be the name of the town, CLLI, MANAGER, SYSTEM,
5ESS, SCCS1, SCC, RCMAC, RCMAxx, etc,...
      If one sees just a " < "  prompt you are at the 'craft' shell
of the RC/V channel, the 5E login has not been set. The Craft shell is
running on the DMERT (which is a UNIX environment development operating system,
a System V hack). The Craft shell prompt is a "<".  From this shell one
will see several error messages.  Here is a list and what they mean:

     Error Message   Meaning

     ?A              Action field contains an error
     ?D              Data field contains an error
     ?E              Error exists in the message but can not be resolved to
                     the proper field (this is the "you have no idea" message)
     ?I              Identification field contains an error
     ?T              Time-out has occurred on channel
     ?W              Warning exists in input line

     Other output message meanings, from the RC/V craft menu.

     OK              Good
     PF              Printout follows
     RL              Retry later
     NG              No good, typically hardware failure
                     (ie: SM does not exist)
     IP              In progress
     NA              The message was not received by the backup control

  When inputing RC messages it is best to do it in the middle of the day
since RC messages are sent to each channel! The SCC is watching and if
there are RC messages running across at 3 in the morning, the SCC is going
to wonder what the hell RCMAC (Recent Change Memory Administration Center)
is doing at three in the morning!  However, one may be hidden by MARCH's
soaking, and the night shift at the SCC are overloaded and may miss
what is going on while correcting other major problems. So it is up to


    The DMERT (Duplex Multiple Environment Real Time) uses the Western
Electric (another name for AT$T!) 3B20D  Duplex processor (or 2 3B20S
Simplex processors).  The DMERT software totals nearly nine thousand
source files, one million lines of non-blank source code,
and was developed by approximately 200 programers. There are eight main
releases of this software, they are referred to as generics (like 5E4.1,
5E4.2,  to 5E8.1 also seen as 5E4(1), 5E4(2) to 5E8(1), this can be though
of as DOS version).  DMERT is similar to regular UNIX but can be best described
as a custom UNIX system based on the 3B20D, the DMERT OS can be ported to
PDP-11/70s or a large IBM Mainframe. The DMERT operating system is split both
logically and physically.  Physically, the software is evenly divided across
the five (there were seven Software Development systems all running a 3B20S
where the DMERT code was written) Software Development systems. Logical, the
software is divided into twenty-four different subsystems.  To access this
from the "craft" shell of the RC/V channel, type:


This will dump one to a root shell, from which VaxBuster's (Who knows nothing
about VAXen, always wondered about him) file on how to redirect a TTY may
come in useful.

Programing the 5ESS

When programing the 5ESS there are things one should know, the first is that
one has a lot of power (just keep 911 in mind,  it would be foolish to even
think of disrupting anyones service.  911 is there for a reason, it should STAY
that way).  And anything one does is logged, and can be watched from the
SCC.  Note that the night SCC crew is a lot more lax on how things are done
then the day shift, so it would be best to do this at night.  I could tell you
how to crash the switch in two seconds, but that is not the point here.
Destroying something is easy, anyone can do that, there is no point to it.
All that taking down a switch will do is get one into jail, and get sued if
someone needed 911 etc,... (I think SRI is wishing they had talked to me

RC from Craft Shell on RC/V Channel

    RC and VFY is complex from the craft shell on the RC/V channel.
This is called the input text option.  It is accessed by using the


    This gets a little complex to follow, but the best thing to do
is to order the Manual 235-118-215 Recent Change Procedures Text Interface
[5E4] it is $346.87, another good one to get is 235-118-242, for $413 even
and last, but the best is 235-118-243, this beast is only $1344.63 what a
deal. When calling the CIC they will transfer you to a rep. from your area.
Gets to be kind of a pain in the ass, but.. Anyways, back on track:


DATA     -  This is for more then one RC operation in the same command

FORM     -  The format that is to be used

SUMMARY  -  Turns on one line summaries on the read only printer (ROP) (DEFULT)
NSUMMARY -  Turns off one line summary logging by the ROP

VFYIMMED -  Prints out verifies (VFYs) immediately, does not wait for
            session end.
VFYEND   -  Prints out all VFYs at session end, this is the DEFULT.

VFYNMVAL -  Print verify output in name-value pair format, this must be
            directed into a file (see DEVICE).
VFYSCIMG -  Makes output into screen size image (DEFULT).

DEVICE   -  Redirect verify output to a device other than ones screen.

            ROP/ROP0   -  Send verify output to the ROP

            STDOUT     -  Send verify output to ones screen (DEFULT)

            TTYx       - Send verify output to any valid tty (such as
                         ttya and ttyv) that exists in "/dev."  You
                         must use the tty name, not tty number.
            FILE       - Send verify output to a file in "/rclog".  The
                         file will be prefixed with "RCTX", and the user
                         will be given the name of the file at the
                         beginning and end of the APPTEXT session.
END      -  END of message.

 If the parameter is not entered on the command line, it may be
entered after the APPTEXT process begins, but must be entered prior to the
first "FORM=" statement. Here is a example of a MML RCV:APPTEXT.


  The 2V1 may look strange at first, it may help getting use to the basics
first. To just VFY telephone numbers, just do a:


   Though I can not really explain this any more then I have just due to
time and space.  These input messages may look complex at first, but are
really simple, and much better then dealing with the menu system, but
you will need to learn RC yourself! No one can explain it to you.

Pulling AMA from the RC/V channel Craft Shell

Pulling AMA up is done with one command. The command is:


 This command will request a report of the current or most recent automatic
message accounting (AMA) tape. ST1 and ST2 are the data streams.

Pulling up out of Service Lines, Trunks or Trunk Groups

   One may want to pull up all the out of service lines, trunks, or
trunk groups for many reasons.  These reasons i will not go into, but
from which lines can be set up. The command to do this from the craft
shell is a PDS command, this command is with a 'ball bat' (a `` ! '').



   OP:LIST,TG [,FULL][,PRINT][;[a][,b][,c][,d][,e]]!

FULL    -   All (primary and pending) are printed. Note FULL is not the
            default when inputing this command.

PRINT   -   Print to the ROP in the CO.  (Not a good idea)

a-e     -   This is port status to match against the subset of trunks, lines
            or trunk groups that are specified.  (This is required input
            for FULL)

The 5ESS RC/V Menu Shell

To access this shell from the RC/V channel craft shell, type:


at the `` < '' prompt.

To access the 5ESS RC/V menu system from the MCC, STLWS, and TLWS
channel/terminals, one uses what are called pokes.  The poke that
is used here to access the RC/V Menu system on the 5ESS is 196.

Type 196 at the `` CMD< '' prompt, and you are on the RC/V menu system
of the 5ESS switch. This will cause ``RC/V 196 STARTING'' and
``RC/V 196 COMPLETED'' to be printed out on the ROP.

Either way, this will toss you into a menu system. The main menu looks like


                               5ESS SWITCH  WCDS0
                        RECENT CHANGE AND VERIFY CLASSES

H RCV HELP              9  DIGIT ANALYSIS          20 SM PACK & SUBPACK
5 TRUNKS17 CM MODULE                               27 OSPS TOLL & ASSIST

Menu Commands:


  The help menus for the 5ESS switch are lame, but I though that it would
be good to show them to you just for the hell of it, because it does explain
a little about the switch.


                           SCREEN 1 OF 7  5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                            COMMANDS FOR MENU PAGES

    H  - Explains commands for MENU or views. If you enter H again, then it
         will display next HELP page.
    H# - Select HELP page. (# - help page number)
    Q  - Quit Recent Change and Verify.
    R  - Change mode to RECENT CHANGE
    V  - Change mode to VERIFY
    <  - Go to CLASS MENU page.
    #  - If on CLASS MENU page Go to a VIEW MENU page #.
    #  - If on VIEW MENU page Go to a RECENT CHANGE or VERIFY VIEW #.


                           SCREEN 2 OF 7  5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                            COMMANDS FOR MENU PAGES

   #R  - Go to Recent Change view for read.
   #I  - Go to Recent Change view for insert.
   #D  - Go to Recent Change view for delete (only print Key fields).
   #DV - Go to Recent Change view for delete with verify (print all fields).
   #U  - Go to Recent Change view for update.
   #UI - Go to Recent Change view for update in insert mode (user can change
         each field sequentially without typing field number).
   #V  - Go to Verify view.
   #N  - Go to next menu page. Back to the 1st page if there's no next page.


                           SCREEN 3 OF 7 5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                               COMMANDS FOR BATCH

BMI - Delayed Activation Mode. Choose time or demand release (for time
      release add service information). Select view number for Recent Change.
BMD - Display Status of Delayed Activation Recent Changes.
BMR - Release a file of Recent Changes stored for Delayed Activation.
IM  - Immediate Release Mode.


                           SCREEN 4 OF 7  5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                               COMMANDS FOR VIEWS

     < - In first field: Leave this view and return to select view number.
     < - Not in first field: Return to first field.
     ^ - In first field: Select new operation for this view.
     ^ - Not in first field: Return to previous field.
     > or ; - Go to end of view or stop at next required field.
     * - Execute the operation or go to next required field.
     ? - Toggle help messages on and off.
     Q - Abort this view and start over.
     V - Validate input for errors or warnings.


                           SCREEN 5 OF 7  5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                               COMMANDS FOR VIEWS

   R - Review view from Data Base.
   I - Insert this view into Data Base.
   U - Update this view into Data Base.
   D - Delete this view from Data Base (only print Key fields).
   C - CHANGE: Change a field - All fields may be changed except key fields
       when in the update mode only.
   C - CHANGE-INSERT: Allowed in the review mode only - Allows you to review
   C - CHANGE-INSERT: Allowed in the review mode only - Allows you to review
       a view and then insert a new view with similar field. You must change
       the key fields to use this facility. You may change other fields as
       required by the new view.
   P - Print hard copy of screen image (must have RC/V printer attached).


                           SCREEN 6 OF 7  5ESS SWITCH
                             RECENT CHANGE VIEW H.1
                               COMMANDS FOR VIEWS

             The following are used only on views containing LISTS.

           ` - Blank entire row.
           - Sets this field to its default value.
           : - Sets this row to its default value.
           [ - Go backward to previous row.
           ] - Go forward to next row.
           ; - Go to end of view or stop at next required field.
           # - Go to end of list and stop at next non-list field.
           { - Delete current row and move next row to current row.
           } - Move current row to next row and allow insert of row.
           = - Copy previous row to current row.
           * - Execute the operation or stop at next required field.


                           SCREEN 7 OF 7 5ESS SWITCH
                             RECENT CHANGE VIEW H.1

          If RC/V is in automatic forms presentation and "Q" or "q" is
        entered for the operation, the following commands are available.

     A - Abort form fields.  RC/V stays in the current form.
     B - Bypass form.  Go to next form using automatic forms presentation.
     C - Cancel automatic forms presentation.  The previous menu
         will be displayed.
     H - Display automatic forms presentation help messages.
     < - Bypass form.  Go to next form using automatic forms presentation.


When accessing the databases, here is a list of database access selections:

   I (insert) - Insert new data
   R (review) - Review existing data
   U (update) - Update or change existing data
   D (delete) - Delete (remove) unwanted data from the data base
   V (verify) - Verify the data in the data base.

These are to be entered when one sees the prompt:


Enter Database Operation
I=Insert R=Review U=Update D=Delete : _


When using the RC/V menu system of the 5ESS, you may go and just keep going into
sub-menus, and fall off the end of the Earth. Here are the navigational
commands that are used to move around the menu system. As seen from the
RC/V menu system help, you see "SCREEN X out of X."  This means that there are
so many screens to go and to move between the screens you use the `` < '' to
move back (toward main menu) and `` > '' to move to the last menu. I know it
is shown in the help menu, but it is not explained like it needs to be.

Batch Input

The Batch Input feature for the 5ESS switch allows recent changes (RC)
to be entered at any date and time when the RC update would be
performed.  This allows RC input to be entered quickly, and for a large
number of inputs. The large numbers of RC input can be released
quickly in  batch mode.  The RC input can then be entered at any time,
stored until needed, and then released for use by the system
whenever needed, at any specific date and/or time.
  First and second level error correction is done during batch input.
  There are several different modes of batch input. These are:

      BMI - batch mode input - TIMEREL and DEMAND
      BMD - batch mode display
      BMR - batch mode release

BMI - Batch Mode Input - TIMEREL and DEMAND

Entering BMI (Batch Mode Input), one types `` BMI '' at the RC/V
menu prompt. Once entering, you will be prompted with whether
the input is DEMAND (demand) or TIMEREL (Time Release). DEMAND
input allows one to manual have the batch update the database,
TIMEREL is automatic. TIMEREL has one enter a time and date.
  When using DEMAND, you will be prompted for the file name. The
file will be in `` /rclog '' in the DMERT OS.
  In TIMEREL, you will be prompted with the CLERK-ID, which in this
case is the file name for the file in the `` /rclog ''. Then
for VERBOSE options, the RC SRVOR (Recent Change Service Order)
is displayed on the screen.

-RC SRVOR View in the BMI TIMEREL Batch Option-

                              5ESS SWITCH
                           RECENT CHANGE  B.1
                        SERVICE ORDER NUMBER VIEW

     *1. ORDNO     __________
     *2. ITNO      ____
     *3. MSGNO     ____

     #4. RDATE     ______
     #5. RTIME     ____

Enter Insert, Change, Validate, or Print:


ORDNO = Service Order Number
ITNO  = Item Number
MSGNO = Message Number
RDATE = Release Date (Update database Date)
RTIME = Release Time (Update database Time)

BMD - batch mode display

   BMD is a "mask" of RC/V done from the RC/V channel craft shell, by using the
REPT:RCHIST or a pseudo menu system. All transactions are displayed on the ROP,
though the data could also be sent to a file in the `` /rclog '' in DMERT.
   The Pseudo menu system looks like:


1. Summary of clerk activity

2. Activity by service order number

3. Activity by clerk ID

4. Return to view or class menu.


1  allows one to view the "DELAYED RELEASE SUMMARY REPORT."
4  Return to view or class menu, self-explanatory.


  The REPT:RCHIST BMD (Text) command is done from the RC/V channel craft
shell. The command synopsis is:

5E2 - 5E5 (Generics)


5E6 - 5E8 (Generics)


SUMMARY         - Report selection, format by key.
DETAIL          - Report selection for Recent Change entire.
ALL             - Report all recent changes.
PENDING         - Report pending recent change input.
COMPLETE        - Report released recent changes that was successful
                  when completed.
FILE            - Name for file in /rclog
ERROR           - Report recent changes released with error.
DEMAND          - Report demand recent changes.
TIME=XXXXXXXXXX - XX - mounth, XX - day, XX - hour, XX minute, XX - Second

BMR - batch mode release

    This is the manual release (updating) of the 5ESS database. This is done
from the RC/V channel craft shell.  The command that is used is the EXC:RCRLS
input message. There is no real need to go into this message.

Adding RCF (Remote Call Forward) on a 5ESS

1. At the "MENU COMMANDS" commands prompt of the 5ESS main menu in the
   RC/V APPRC menu system of the 5ESS, enter '12' for the "BRCS FEATURE
   DEFINITION".  Then access screen '1.11', this is the BRCS screen. When it
   asks you to 'ENTER DATABASE OPERATION' enter "U" for Update and hit

   NOTE: When at menu '12,' you will NOT see '1.11' listed in the menu
   options.  By just accessing menu '1' you will not be able to add features.
   This is a problem with the 5ESS menu system.

2. Type in the Telephone Number. It should look like this:


  Mon Feb 31 09:09:09 2001    RFA_TN


                           5ESS SWITCH WCDS0
  SCREEN 1 OF 2           RECENT CHANGE 1.11

 *1. TN 5551212    * 2. OE  _ ________    3. LCC ___   4. PIC 288
 *5. PTY _*          6. MLHG ____         7. MEMB ____ 8. BFGN _______ _

                        FEATURE LIST (FEATLIST)
  ROW   11. FEATURE  A P   15. FEATURE  A P  19. FEATURE  A P  23. FEATURE  A P
  1.        /CFV     N _       ________ _ _      ________ _ _      ________ _ _
  2.        ________ _ _       ________ _ _      ________ _ _      ________ _ _
  3.        ________ _ _       ________ _ _      ________ _ _      ________ _ _
  4.        ________ _ _       ________ _ _      ________ _ _      ________ _ _


   and will prompt you with:


Enter Insert, Change, Validate, screen#, or Print: _
form operation prompt


          I   -   to insert a form
          C   -   to change a field on a form
          V   -   to validate the form
          A   -   to display the desired screen number
          P   -   to print the current screen
          U   -   to update the form

   Enter `` C '' to change, access filed 11 and row 1 (goto the /CFV
   wherever it may be) or add /CFR if it is not there. If it does though,
   leave the "A" (Active) field "N" (Yes or No). Change the P (Presentation)
   column to "U" (Update). Then Hit Return.

   NOTE: Different Generics have other fields, one of them being a AC (Access
   Code) field.  This field is a logical field, that mean only accepts a
   "Y" for yes and "N" for no.  Also when adding the feature to the switch,
   the row and field numbers may not be shown, but will always follow this
   pattern.  Also note that the /CFV (Call forwarding variable) feature may not
   be there, there maybe no features on the line.  These examples are from
   Generic 4 (2).  Here is a example of 5E8 (which is not used too many places,
   but this is what menu 1.11 in the BRCS Feature Definition looks like:


                             5ESS SWITCH
                    SCREEN 1 OF 2 RECENT CHANGE  1.11
                (5112,5113)BRCS FEATURE ASSIGNMENT (LINE)

(*)1. TN _______ (*)2. OE  _ ________    3. LCC ___   4. PID ___
(*)6. MLHG ____     8. BFGN _______ _
(*)5. PTY _(*)                                7. MEMB ____

                     11. FEATURE LIST (FEATLIST)
 1    ________  _ _ _  _     8   ________  _ _ _  _    15   ________  _ _ _  _
 2    ________  _ _ _  _     9   ________  _ _ _  _    16   ________  _ _ _  _
 3    ________  _ _ _  _    10   ________  _ _ _  _    17   ________  _ _ _  _
 4    ________  _ _ _  _    11   ________  _ _ _  _    18   ________  _ _ _  _
 5    ________  _ _ _  _    12   ________  _ _ _  _    19   ________  _ _ _  _
 6    ________  _ _ _  _    13   ________  _ _ _  _    20   ________  _ _ _  _
 7    ________  _ _ _  _    14   ________  _ _ _  _    21   ________  _ _ _  _

Enter Insert, Change, Validate, screen#, or Print: _


   Hit Return twice to get back to "ENTER UPDATE, CHANGE, SCREEN #, OR PRINT:".
   Enter a "U" for update and hit Return. It will say "FORM UPDATE".

3. Next access screen 1.22, call forwarding (line parameters) or it will
   just come up automatically if you set the "P" to "U".


  Mon Feb 31 09:09:09 2001    RCFLNTN


                            5ESS SWITCH WCDS0
                           RECENT CHANGE 1.22

   *1. TN            5551212
   *6. FEATURE       CFR
    9. FWDTODN       ______________________________
   10. BILLAFTX      0                    16. SIMINTER       99
   11. TIMEOUT       0                    17. SIMINTRA       99
   12. BSTNINTVL     0                    18. CFMAX          32
   13. CPTNINTVL     0                    19. BSRING         N


4. If you used the automatic forms presentation, it will have the telephone
   number already on LINE1. If not retype the telephone number you want
   forwarded. The bottom of the screen will say "ENTER UPDATE, CHANGE, VALIDATE
   OR PRINT:", type "C" for change and hit return.

5. When it says CHANGE FIELD type "9" and enter your forward to DN (Destination
   Number) including NPA if necessary. This will put you back to the "CHANGE
   FIELD" prompt. Hit return again for the "ENTER UPDATE, CHANGE, VALIDATE OR
   PRINT:". Hit "U" for Update form and wait for "FORM UPDATED".

6. Lastly, access screen 1.12, BRCS FEATURE ACTIVATION (LINE ASSIGNMENT). At the
   prompt enter a "U" for Update, and on ROW 11 Line 1 (or wherever), change
   the "N" in column "A" to a "Y" for Yes, and you are done.

Adding other features

  To add other features onto a line, follow the same format for adding the
/CFR, but you may not need to access 1.22.  Some other features are:

Feature Code:          Feature Name:

/LIDLXA            -   CLID
/CFR               -   Remote Call Forward
/CWC1              -   Call Waiting
/CFBLIO            -   call forward busy line i/o
/CFDAIO            -   call forward don't answer i/o
/CFV               -   call forwarding variable
/CPUO              -   call pick up o  !used in the selq1 field!
/CPUT              -   call pick up t  !used in the tpredq field!
/CWC1D             -   Premiere call waiting
/DRIC              -   Dist. ring
/IDCT10            -   Inter room ID
/IDCTX2            -   1digit SC
/IDCTX2            -   Interoom ID 2
/IDCTX2            -   Premiere 7/30, convenience dialing
/IDCTX3            -   Premiere 7/30, no cd
/IDMVP1            -   Premiere 2/6, no convenience dialing
/IDMVP2            -   Premiere 2/6, CD, not control sta.
/IDMVP3            -   Premiere 2/6, CD, control station
/MWCH1             -   Call hold
/MWCTIA2           -   Call transfer 2
/TGUUT             -   Terminal group ID number with TG view (1.29).

ANI/F  the whole switch

 Automatic Number Identification failure (also called "dark calls") are
caused by variety of different things.  To understand this better, here are
the technical names and causes, note this is not in stone and the causes
are not the only causes for a ANI-F to occur.

ANF   -- Failure to receive automatic number identification
         (ANI) digits on incoming local access and transport
         area (LATA) trunk.
ANF2  -- Automatic number identification (ANI) collected by
         an operator following a failure to receive ANI
         digits on an incoming centralized automatic
         message accounting (CAMA) trunk from the DTMF decoder.
ANI   -- Time-out waiting for far off-hook from Traffic
         Service Position System (TSPS) before sending ANI

  Though, I have always wondered how to set one up myself in a safe way.
 One way nice way to get ANI/F through a 5ESS to use a inhibit command.


The command will inhibits centralized automatic message accounting (CAMA)
operator number identification (ONI) processing. This is done from the DTMF
decoder (going over later).  This message will cause a minor alarm too occur.
If in the CO when the alarm occurs, you will here this bell all the time,
because something is always going out. In this case, this alarm is a level 1
(max to five) and the bell will ring once.
  Once this message is inputed, all calls through CAMA operator will be
free of change. So just dial the operator and you will have free calls.

To place this back on the switch, just type:


and the minor alarm will stop, and things will go back to normal.

Setting up your own BLV on the 5ESS from the Craft shell RC/V Channel

  Well, we have come to the fun part, how to access the No-Test trunk on
the 5ESS (this is also called adding the third trunk). I will not be too
specific on how to do this.  You will need to figure out just how to do this.
  The first thing you want to do is to request a seizure of a line for
interactive trunk and line testing. One must assign a test position (TP).


          a = A number between 1 and 8
          b = The number you wish assigned to the test position

  This will chose a number to be the test number on the switch. Now using
the CONN:WSLINE one can set up a BLV.


          a = TP that you set from the SET:WSPOS
          b = The number you want to BLV

To set this up on a MLHG (can come in real useful for those peksy
                           public packet switched networks), do a:


          x = MLHG number, y = MLHG member number

To take set things back to normal and disconnect the BLV do a:


          z = TP 1 through 8


One may need to do a ALW:CALLMON before entering the CONN commands


If you set your home telephone number as the test position, and you
have only one phone line, you are stupid.

Comments about the Underground

   There are a few people out there who have no idea what they are doing, and
go on thinking they know it all (i.e. No Name Brand).  It pisses me off when
these people just go off and make shit up about things they have no idea
what they are talking about.
   This file is to all the lazy people out there that just keep bitching
and moaning about not knowing where to find information.

Other Sources

Here is a list of Manuals that you can order from the CIC (1-800-432-6600).
Note that some of these manuals are well over hundreds of dollars.

Manual 234-105-110   System Maintenance Requirements and Tools
Manual 235-001-001   Documentation Guide
Manual 235-070-100   Switch Administration Guidelines
Manual 235-100-125   System Description
Manual 235-105-110   System Maintenance Requirements and Tools
Manual 235-105-200   Precutover and Cutover Procedures
Manual 235-105-210   Routine Operations and Maintenance
Manual 235-105-220   Corrective Maintenance
Manual 235-105-231   Hardware Change Procedures - Growth
Manual 235-105-24x   Generic Retrofit Procedures
Manual 235-105-250   System Recovery
Manual 235-105-250A  Craft Terminal Lockout Job Aid
Manual 235-105-331   Hardware Change Procedures - Degrowth
Manual 235-105-44x   Large Terminal Growth Procedures
Manual 235-118-200   Recent Change Procedures Menu Mode Generic Program
Manual 235-118-210   Recent Change Procedures Menu Mode
Manual 235-118-213   Menu Mode 5E4 Software Release
Manual 235-118-214   Batch Release 5E4 Software Release
Manual 235-118-215   Text Interface 5E4 Software Release
Manual 235-118-216   Recent Change Procedures
Manual 235-118-217   Recent Change Procedures Batch Release 5E5 Software
Manual 235-118-218   Recent Change Attribute Definitions 5E5 Software Release
Manual 235-118-21x   Recent Change Procedures - Menu Mode
Manual 235-118-224   Recent Change Procedures 5E6 Software Release
Manual 235-118-225   Recent Change Reference 5E6 Software Release
Manual 235-118-240   Recent Change Procedures
Manual 235-118-241   Recent Change Reference
Manual 235-118-242   Recent Change Procedures 5E8 Software Release
Manual 235-118-24x   Recent Change Procedures
Manual 235-118-311   Using RMAS 5E4 Software Release
Manual 235-118-400   Office Records and Database Query 5E4 Software Release
Manual 235-190-101   Business and Residence Modular Features **
Manual 235-190-105   ISDN Features and Applications
Manual 235-190-115   Local and Toll System Features
Manual 235-190-120   Common Channel Signaling Service Features
Manual 235-190-130   Local Area Services Features
Manual 235-190-300   Billing Features
Manual 235-600-103   Translations Data
Manual 235-600-30x   ECD/SG Data Base
Manual 235-600-400   Audits
Manual 235-600-500   Assert Manual
Manual 235-600-601   Processor Recovery Messages
Manual 235-700-300   Peripheral Diagnostic Language
Manual 235-900-101   Technical Specification and System Description
Manual 235-900-103   Technical Specification
Manual 235-900-104   Product Specification
Manual 235-900-10x   Product Specification
Manual 235-900-301   ISDN Basic Rate Interface Specification
Manual 250-505-100   OSPS Description and Procedures
Manual 363-200-101   DCLU Integrated SLC Carrier System
Manual TG-5          Translation Guide

Practice 254-341-100 File System Software Subsystem Description
                     3B20D Computer
Practice 254-301-110 Input-Output Processor Peripheral Controllers
                     Description and Theory of Operation AT$T 3B20D
                     Model 1 Computer   None.
Practice 254-341-220 3B20 System Diagnostic Software Subsystem
                     Description 3B20D Processor

CIC Select Code 303-001 Craft Interface User's Guide
CIC Select Code 303-002 Diagnostics User's Guide
CIC Select Code 303-006 AT$T AM UNIX RTR Operating System, System
                        Audits Guide

IM-5D000-01 Input Manual
OM-5d000-01 Output Manual

OPA-5P670-01 The Administrator User Guide
OPA-5P672-01 The Operator User Guide
OPA-5P674-01 The RMAS Generic - Provided User Masks


5ESS - Registered trademark of AT$T.
CLCI - Trademark of Bell Communications Research, Inc.
CLLI - Trademark of Bell Communications Research, Inc.
ESS - Trademark of AT$T.
SLC - Registered trademark of AT$T.
UNIX - Registered trademark of AT$T.
DMERT - Registered trademark of AT$T.
SCCS - Registered trademark of AT$T
DMS - Registered trademark of Northern Telecom
DEC - Registered trademark of Digital Equipment Corporation.
VT100 - Trademark of Digital Equipment Corporation.

Acronyms and Abbreviations

ADTS    -  Automatic Data Test System
ALIT    -  Automatic Line Insulation Testing
AMA     -  Automatic Message Accounting
AP      -  Attached Processor  (1AESS 3B20)
ATICS   -  Automated Toll Integrity Checking System
BLV     -  Busy Line Verification
BMD     -  Batch Mode Display
BMI     -  Batch Mode Input - TIMEREL and DEMAND
BMR     -  Batch Mode Release
BRCS    -  Business Residence Custom Service
CAMA    -  Centralized Automatic Message Accounting
CIC     -  Customer Information Center (AT$T)
DAMT    -  Direct Access Mechanize Testing
DLTU    -  Digital Line Trunk Unit
DMERT   -  Duplex Multiple Environment Real Time
DSU     -  Digital Service Unit
DTAC    -  Digital Test Access Connector
GRASP   -  Generic Access Package
IOP     -  Input/Output Processor
IPS     -  Integrated Provisioning System
ISDN    -  Integrated Services Digital Network
ITNO    -  Item Number
LMOS    -  Loop Maintenance Operations System
LU      -  Line Unit
MCC     -  Master Control Center
MLT-2   -  Mechanized Loop Testing - The Second Generation of Equipment
MML     -  Man Machine Language
MSGNO   -  Message Number
MSGS    -  Message Switch
NCT     -  Network Control and Timing
ODD     -  Office Dependent Data
OE      -  Office Equipment
ONI     -  Operator Number Identification
ORDNO   -  Service Order Number
OSPS    -  Operator Service Position System
OSS     -  Operations Support System
POVT    -  Provisioning On-site Verification Testing
RC      -  Recent Change
RC/V    -  Recent Change and Verify
RDATE   -  Release Date (Update Database Date)
RMAS    -  Remote Memory Administration
RTIME   -  Release Time (Update Database Time)
RTS     -  Remote Test Unit
SARTS   -  Switched Access Remote Test System
SCCS    -  Switching Control Center System
SLC     -  Subicer Loop Carrier
SM      -  Switching Module
SMAS    -  Switched Maintenance Access System
SMPU    -  Switch Module Processor Unit
SONET   -  Synchronous Optical Network
SPC     -  Stored Program Control
STLWS   -  Supplementary Trunk and Line Work Station
TFTP    -  Television Facility Test Position
TIMEREL -  Time Release
TIRKS   -  Trunk Integrated Record Keeping System
TMS     -  Time Multiplexed Switch
TRCO    -  Trouble Reporting Control Office
TSI     -  Time Slot Interchangers
TSIU    -  Time Slot Interchange Unit
TU      -  Trunk Unit
VFY     -  Verify

I give AT$T due credit for much of this file, for without them, it would not
have been possible!
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