Freedom Issue 2, February 28, 1993
				   File 2/7
 
			    Northern Telecom SL-1
				  by ICEMAN

	This article is fairly lengthy, but I felt that it was worth including
all the information that I did, even though a great deal of it is useless to
someone attempting to take advantage of such a system. If you have any
interest in learning about PBX's, then in my opinion it's worth reading in
it's entirety. Just a note that you can't expect to learn this all in one
sitting, it takes time and experience. I would say that about 50% of this
material was taken from other sources, ranging from Northern Telecom manuals,
to classroom handouts used to educate those who work with them. Although most
of the technical information is straight out of the book, I did my best to
simplify it as much as I could, so that the reader can get a better grasp on
it.

	Development of Northern Electric's SL-1 started in 1971. Their
objective was to design a superior communications system for business 
subscribers in the range of 100 to 7600 stations. The system had to encompass
all the features of a PBX, Centrex and key systems and be economically
competitive with them. It had to have new custom services not previously
feasible with the older systems. It had to be easy to learn and to operate.
As well, it had to be easy to install and maintain.

	What the designers came up with was a digital, stored program control
machine using an 8-bit PCM. They also came up with a new telephone instrument,
the SL-1 telephone, which is a multi-line instrument with many features, but
uses only 2 pairs of wires, instead of 25 pairs required by key telephones.

	The SL-1 system has three main parts: The common equipment (CE), the
peripheral equipment (PE) and the power supplies.

	The CE performs the central control and switching functions for all
the connecting lines and trunks. It has a central processing unit (CPU) and
read/write memory which stores all the operating programs and data unique
to the particular system, including switching sequences, feature and class
of service information, and numbers and types of terminals. It also has a
magnetic tape unit for high-speed loading of the operating programs and data
into the R/W memory, providing data restoral after a power failure. The tape
also contains the diagnostic routines. There is a Teletype to communicate to
the system with and to print error messages on. The network circuits perform
the switching duties for all lines and trunks. The digital service circuits
provide for such functions as dial and ringing tones and call conferencing.

	The CE units communicate over a common central bus under control of
the CPU. Speech signals, converted to digital, follow a separate path on a
network switching bus.

	The PE performs the interface between the line and trunk circuits and
the SL-1 system. It consists mainly of line and trunk cards which convert
analog speech to digital signals for digital switching and vice versa. Lines
connect to individual instruments and trunks to other PBX's. Peripheral 
buffers act as interface between the PE and the CE providing power control,
timing and switching control signals for the line and trunk circuits. Digital
conversion into 8-bit PCM is done by a single encoder/decoder (codec) for each
line or trunk. This codec is a custom LSI circuit.

	Between the PE and the CE, all signals travel in digital format on 
time multiplexed loops. Each loops carriers 30 voice channels, one control
signalling channel and one unused channel. The channels operate at 64 kbps
to give a total data rate of 2.048 mbps. Each loops terminates on a different
circuit pack in the CE. There can be up to 16 multiplex loops.

	When a call is set up, the CPU assigns each party a channel from among
the 30 on their own multiplex loops. These channels form a matched pair. For
instance, the calling party may use channel 2 of it's digital loop, and the
called party may use channel 3 of it's loop.

	The SL-1 conducts audio digitally. The line and trunk cards contain
A/D and D/A converters. Received audio is changed to a digital signal and
put on a voice channel. At it's destination, the digital signal is converted
back to analog audio.

	All programming is done from a keyboard with the output going to a
printer. To program, a specific diagnostic is selected, and is automatically
loaded from tape. Once this is done, the appropriate commands are entered to
change the options. All typing is echoed on the printer and the SL-1's
responses are printed out. If any system parameters or configurations are 
changed, these changes will not survive a total power outage unless a new
tape is made.

	In case of a power outage, upon restoral of power, the SL-1 activates
the tape unit and loads in the system operating data, and runs some 
diagnostics. This takes from 5-15 minutes, and at the end of that time,
service is fully restored with all the options which were recorded on the tape
being implemented. Of course any user-selected options like speed call lists 
and call waiting which had been selected before the outage will be lost.

	Automatic diagnostics (called 'background' programs) are being run
constantly with the results of any problems being printed out. At midnight
a more thorough set of diagnostics are run. Any of the diagnostics may be
run on demand from the keyboard. Also available on demand from the keyboard
are a series of diagnostics to determine the status of lines and trunks, to
trace calls, and to print lists and traffic studies.


				 SL-1 Features
				 ~~~~~~~~~~~~~

	- Call Waiting                     - Digitone (DTMF) service             
	- Ring Again                       - Direct inward dialing     
	- Display services                 - Direct outward dialing
	- Tandem switching                 - Private line service
	- Special dial tone                - Remote administration and     
	- Traffic measurement                maintenance
	- Common control switching         - Multi-customer group operation
	  arrangement access               - Line/trunk lockout
	- Data transmission                - Flexible numbering system
	- Access to automatic recorded       (2 to 4 digits)
	  answering equipment              - Pulse to DTMF conversion
	- Access to paging equipment       - DTMF to pulse conversion
	- Call forward - busy              - Emergency transfer
	- Call forward - don't answer      - Hunting
	- Call forward - follow me         - Intercept
	- Call pickup                      - Manual service
	- Conference (3 or 6 party)        - Night service
	- Service restrictions

			  SL-1 Telephone Set Features
			  ~~~~~~~~~~~~~~~~~~~~~~~~~~~

	- Autodial                         - Automatic preselection
	- Call status                      - Headset connection
	- Call forwarding                  - Executive override
	- Call transfer                    - Hold     
	- Speed calling                    - On-hook dialing     
	- Call waiting                     - LED indicators
	- Tone ringing                     - Call pickup
	- Common audible signalling        - Loudspeaker/Amplifier     
	- Ring again                       - Voice calling
	- Hands free operation             - Manual signalling
	- Multiple appearance directory    - 3 or 6 party conference
	  number; multiple call            - non-locking keys
	  arrangements                     - Single appearance directory
	- Prime directory number             number
	- Station set expansion            - Privacy
	- Privacy release


			Explanation of Some Features
			~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Station to station calling - Any station can directly call any other station
without attendant assistance.

Direct Outward Dialing (DOD) - Allows a station to gain access to the exchange
network without attendant assistance and receives a second dialtone.

Hunting - Routes a call to an idle station directory number when the called
number is busy. The numbers in the hunt group do not have to be in sequence
nor do they have to appear on the same instrument. The sequence can be
consecutive (station directory numbers are hunted in ascending numerical
order) or non-consecutive.

Access to paging - Provides a connection to customer-owned paging equipment.

Access to Automatic Recorded Answering Equipment - SL-1 stations can have
incoming messages recorded on customer-provided answering equipment by
forwarding calls to the directory number (DN) assigned to the equipment.

Direct Inward Dialing (DID) - Allows an incoming call from the exchange
network to reach a station without attendant assistance. The DN for each
station will normally be the last 2,3 or 4 digits of the 7 digit exchange
network number.

Tandem Switching - The SL-1 can act as an intermediate switching point for
traffic between other PBX's.

Manual Service - Does not provide a dialtone when a station goes off-hook.
Instead the attendant is alerted and completes the call for the user.

Private Line Service - Permits the appearance of a private central office line
on an SL-1 Telephone set. Dialtone is received directly from the telco and
calls are not processed by the SL-1.

Multi-Customer Group Operation - Allows for the provision of services for more
than one business customer from the same switching machine. Each customer
is totally separate from the others, may have the same directory numbers as
the others, has his own attendant console, his own trunks, and cannot directly
call stations belonging to the other customers.

Service Restrictions - Allows the ability to restrict various functions.

Intercept - Disposes of calls which cannot be completed because of 
restrictions or dialing errors. They are either routed to the attendant
or overflow tone.

Special Dial Tone - A Regular dialtone with three 128 ms interruptions at the
beginning to advise the user that his hookswitch flash has been successful.

Line Lockout - Disconnects stations which have been off-hook for too long to
prevent system problems.

Night Service - Allows the attendant to preconnect some or all of the incoming
telco trunks to selected DN's on the SL-1.

Emergency Transfer - Puts the system in the power fail transfer mode. This
transfers telco trunks to selected stations to provide some continuity of
service to the outside world during the time the SL-1 is inoperative.

Remote Administration and Maintenance - Permits operation of the diagnostics
from a remote location via a modem and telephone line. You may do anything
from the remote terminal that you can do from the local terminal.

Call Forward - Busy - Routes incoming calls to another number when the called
station is busy.

Call Forward - Don't answer - Routes incoming calls to another number when the
called station doesn't answer within a prescribed time.

Call Forward - Follow me - Routes incoming calls to another, programmable
number.

Call Waiting - Informs the user of a second incoming call while he is already
in conversation. He can then place the first caller on hold and answer the
second call. He can then return to the first call.

Conference - Allows a user to connect up to either 1 or 4 additional persons
into an existing call. Up to 2 of the users may be trunks.

Call Pickup - Allows a station to answer an incoming call to another station
in the same pickup group by dialing a special code.

Ring Again - Permits a calling station, on encountering a busy DN, to operate
a dedicated key or dial a special code to have the system monitor the called
station and alert him when it goes idle. He is then automatically connect to
that station when he goes off-hook or presses the key during the alert and the
system rings that station.

Data Transmission - The SL-1 is suitable for voiceband data transmissions
and is compatible with a conventional modem.


				 SL-1 Models
				 ~~~~~~~~~~~

Model    Lines     Introduced    Generic      Features
~~~~~    ~~~~~     ~~~~~~~~~~    ~~~~~~~      ~~~~~~~~
SL1-L    300-700      1975         x01      - N/A

SL1-VL   700-2500     1976         x02      - Multi customer operation
					    - Automatic Identification of
					      outward dialing
					    - Do not disturb

CDR      N/A          1977       x03,x04,   - Call detail recording
				 x08        - Recorded Announcement
					    - Digit display console

SL1-LE   300-700      1978         x05      - Automatic Route Selection

SL1-VLE  700-2500      N/A         N/A      - Remote peripheral equipment
					    - Automatic Number Identification
					    - "E" system
					    - Autovon

SL1-A    60-400       1979       x06,x07,   - Centralized attendant service
				 x14        - Automatic call distribution
					    - Digit display SL-1 Sets
					    - 2500 Set Features
					    - Direct inward system access
					    - Dial Intercom
					    - Message Center
					    - Hotel/Motel
					    - International Phase 1

SL1-XL   1000-5000    1980       x09,X17    - Advanced ACD packages  
					    - Multiple message center
					    - Integrated voice and data 
					      switching
					    - Hospital/Clinic
					    - International Phase 2

ESN      N/A          1981       x9000      - Office data administration 
					      system
					    - Automatic Wake-up
					    - Room status
					    - Auxiliary data system
					    - Electronic switched network
					    - International Phase 3

SL1-M    60-400       1982       x11 rls 1  - Attendant Administration
					    - Attendant overflow
					    - Automatic set relocation
					    - History file
					    - Call park
					    - Flexible code restriction
					    - System speed call
					    - International Phase 4&5

SL1-S    30-160       1983       x11 rls 4  - Distinctive ringing
					    - Stored number redial
					    - Async. interface module
					    - Sync. data transmission
					    - Multi-channel data system
					    - SL-1 displayphone
					    - Hotel/Motel


'Generic' refers to the software version. It is expressed as a 3 or 4 digit
number where the first part of the number indicates the machine it is for
and the second part indicates the purpose of the software and serves as a 
version number and also indicates the type of machine it can be used with. The
'X' stands for a 1 or 2 digit number representing the model:

1 = SL1-L     2 = SL1-VL     3 = SL1-LE     4 = SL1-VLE     5 = SL1-A
6 = SL1-XL    7 = SL1-M/S    8 = SL1-N      9 = SL1-XN      10= SL1-ST
11= SL1-NT    12= SL1-XT

			    Maintenance Programs
			    ~~~~~~~~~~~~~~~~~~~~

	All troubleshooting procedures, configuration changes and circuit
disabling/enabling are carried out from the keyboard of a Teletype via 
software programs. There is virtually no physical contact with the exchange
other than required to remove a defective board and replace it with a spare.
Even this does not require tools.

	This material will give only a brief description of each program and
some examples of how to use them.

	Before running a program you must first gain access to the computer.
The dialup will normally be a 1200 baud connection, with an even parity,
databits of 7, and stopbits of 1 (E71). Once connected press the 'return'
key to wake the system up. The system SHOULD respond with 'OVL111 BKGD' or
'OVL111 IDLE' and now you know it's alright to login. If the response is
'OVL000' and then a '>' prompt you are already logged in, and you can go
straight to loading an overlay.

	Type 'LOGI' to initiate the login. Make sure when entering commands
that they are all input in uppercase. The system responds with 'PASS?'. Now
enter the password. The default password is '0000' but is obviously
configurable. If you have correctly logged in, the system will respond with
a '>' prompt. The system will display this prompt whenever waiting for
operator input and is not running a diagnostic program. Once a diagnostic
program is running the prompt becomes a '.' (period). If you are not logged
in, there is no prompt.

	What follows is an example of what you will see during login.

{ Hit Carriage Return }
.
.
.
.LOGI                        { Initiate Login                    }
PASS?                        { Enter password, it will not echo  }
OVL015                       { Error code for incorrect password }
TTY 01 SCH MTC    16:40

OVL 45 BKGD
.LOGI                        { Try again }
PASS?
.
>
OVL000
>LD 22           { You are now logged in and ready to load an overlay program }
		 { in this case we are loading overlay 22, a print routine.   }
PT20000

REQ TID          { The REQ prompt appears, now enter your selection, in this }
		 { case we want to print the TID (Tape ID)                   }
TAPE ID:
LOADED XXXXXX
DISK/TAPE   XXXXXX

REQ ISS          { Enter ISS to view the Issue and Release number of the     }
		 { software/switch                                           }
VERSION 1011
RELEASE 14
ISSUE 39


REQ END          { Enter END to quit this overlay }
>LOGO
>
.                { Logout and hangup }

	
	Now after gaining this information, we can determine what type of
system we're dealing with. Notice that the version number is 1011. Now
refer back to the listing of SL-1 Models for the information we seek. We are
logged into an x11 system (last 2 digits of the version number). Unfortunately,
there are two system with x11 generics, and none of which have a release
number of 14, so we're either dealing with an SL1-M or an SL1-S, with either a
60-400 or 30-160 line capability respectively. Although this information isn't
extremely useful, it comes in handy when determining how large the system is.


			      Overlay Programs
			      ~~~~~~~~~~~~~~~~

	Upon first logging in, no program is loaded, and you must load a
program (overlay) into system memory. This is done by the command 'LD'
followed by a space and the overlay number. To load overlay 10 you would
simply do a 'LD 10'. It will take approximately 1 minute to load the overlay
into memory from tape, if the system uses a tape drive. If the system uses
other methods of storage (disks, ROM) then it will load quickly. Once the
program is loaded, a 'REQ' (request) prompt will appear. The system is now
waiting for input from the user.

	There are many different overlays which can be used, all of which
are explained in the following section.

Number     Name                          Purpose
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  10   500/2500 Type     Allows new 500/2500 telephone data blocks to be
       Telephone         generated, existing office data modified, moved
			 to a new TN location on the same loop, or removed
			 from the system.

  11   SL-1 Type         Allows new SL-1 telephone data blocks to be
       Telephone         generated, existing office data to be modified,
			 moved to a new TN location on the same loop, or
			 removed from the system.

  12   Attendant         Allows new SL-1 attendant console data blocks to be
       Console           generated, existing office data to be modified,
			 moved to a new TN location on the same loop, or
			 removed from the system.

  13   DIGITONE          Allows new DIGITONE and SL-1 tone detectors blocks
       Receiver and      to be generated, moved to a new TN location on the
       SL-1 Tone         same loop, or removed from the system.
       Detectors

  14   Trunks            Allows new trunk data blocks to be generated,
			 existing office data modified, moved to a new TN
			 location on the same loop, or removed from the 
			 system.

  15   Customer          Allows new customer data blocks to be generated,
			 existing office data modified, or removed from the
			 system.

  16   Trunk Route/      Allows new trunk/ATM route and ATM schedule hours
       Automatic Trunk   data blocks to be generated, existing office data
       Maintenance       modified, or removed from the system.

  17   Configuration     Allows the configuration record to be modified to
       Record            reflect changes in the system parameters.

  18   Speed Call        Allows speed call/system speed call and group call
       Group Call Data   data to be generated, modified, or removed from the
			 system.

  19   Code Restriction  Allows code restriction data block to be generated,
			 modified, or removed from the system.

  20   Print Routine 1   Allows the printing of:
			 - SL-1 TN data blocks
			 - 500 TN data blocks
			 - attendant TN data blocks
			 - trunk TN data blocks
			 - DIG data blocks
			 - group call data
			 - templates
			 - speed call lists
			 - hunting patterns of stations
			 - unused units
			 - unused card positions
			 - terminal numbers

  21   Print Routine 2   Allows the printing of:
			 - customer data blocks
			 - code restriction data blocks
			 - route data blocks
			 - a list of trunks in a route
			 - ATM data
			 - ATM schedules
			 - TN associated with CAS keys

  22   Print Routine 3   Allows the printing of:
			 - the configuration record
			 - directory number to TN matrix
			 - equipped packages
			 - history
			 - password numbers
			 - ROM QPC number
			 - station category indication
			 - version and issue of generic

  23   ACD/Message       Allows ACD data, ACD management report schedules,
       Center            and Message Center data to be generated, modified,
			 or removed.

  24   DISA              Allows data for direct inward system access to be
			 generated, modified or printed.

  25   Move Data         Allows movement or interchanges of data between
       Blocks            loops, shelves and packs in the same customer 
			 group.

  26   Do Not Disturb    Allows DND groups to be formed, changed, merged,
			 removed or printed.

  28   ANI Route         Allows ANI route selection data block to be 
       Selection         generated, modified, removed, or printed.

  29   Memory/           Used to determine the amount of unused memory, and
       Management        to determine if enough memory is available to add
			 new data. Also used to respond to error messages
			 SCH601 and 603 on Meridian SL-1 XN systems.

  49   NFCR              Allows code restriction data blocks to be defined,
			 modified, removed, or printed.

  50   Call Park         Allows call park data to be generated, modified,
			 removed, or printed.

  73   Digital Trunk     Allows Digital Trunk Interface data to be generated
       Interface         or modified.

  81   Features/         Allows stations to be listed or counted according
       Stations Print    to their features.

  82   Hunt Chain/       Allows printing of hunting patterns and multiple
       Multiple          appearance groups.
       Appearance Print

  83   TN Sort Print     Allows printing of stations according to station DES.

  84   DES Entry         Allows the assignment of station DES to 500/2500
			 sets.

  85   DES Entry         Allows the assignment of station DES to SL-1 sets.

  86   ESN 1             Allows electronic switched network data defining
			 BARS/NARS/CDP features to be generated, modified,
			 or printed.

  87   ESN 2             Allows electronic switched network data defining
			 BARS/NARS/CDP features to be generated, modified,
			 or printed.

  88   Authorization     Allows data for Basic Authorization Code (BAUT) and
       Code              Network Authorization Code (NAUT) to be generated,
			 modified, or printed.

  90   ESN 3             Allows data for ESN network translation tables to be
			 generated, modified, or printed.

  93   Mult-Tenant       Used to enable and administer multi-tenant service.
       Service

       
				 Programming
				 ~~~~~~~~~~~

	The following few sections will summarize the possible commands and
responses for various overlays. Since there are various models of SL-1's as
well as various software versions running on them, there are bound to be
differences in the commands, to accommodate this, notice the 'generic' heading.
If 'all' appears under this heading, then the following command/prompt is
found in all models/versions, otherwise it only appears in the models/versions
that are specified under this column. Once an overlay is loaded, the first
prompt will appear. For example when overlay 10 is loaded, the 'REQ' prompt
will appear, and you will choose the appropriate response, in this case the
choices are 'NEW','CHG','MOV','OUT', and 'END', then the next prompt will
appear and so on. Note that not all prompts will appear for all versions,
but i've done my best to include possible prompts that you can come across.
When entering input, if you make a mistake and would like the system to
disregard the current line, end the line with a '*' then a carriage return.
If you make a mistake, and would like to return to the beginning of the
input routine, enter '**' at the end of the line, followed by a carriage
return, and you will return to the 'REQ' (request) prompt.


Overlay 10: 500/2500-Type Telephone Set
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

GENERIC       PROMPTS   RESPONSES               COMMENTS
~~~~~~~       ~~~~~~~   ~~~~~~~~~               ~~~~~~~~
all           REQ       NEW,CHG,MOV,OUT,END     NEW - Add a new set
						CHG - Change a current set
						MOV - Move a set
						OUT - Remove a set
						END - Quit this overlay

all           TYPE      500                     500/2500 Telephone set data
						block (500 is a normal
						telephone set)

X11                     CARD                    500/2500 Card Block

all           TN        LL S CC U               LL (Loop), S (Shelf),
						CC (Card), U (Unit)

X11.4         CDEN      (dd),sd                 Card Density (double) single
						Normally double

all           TOTN      LL S CC U               New loop, shelf, card, unit,
						LL (Loop), S (Shelf),
						CC (Card), U (Unit)

X04+          DES       XXXXXX                  1-6 digit alphanumeric station
						designator for ODAS

all           CUST      0-31                    Customer Number

X05,X09+      DIG       0-253 0-99              Group Number and Member Number

all           DN        XXXX                    Directory Number (Extension)

all           HUNT      XXXX                    Hunt Directory Number
all                     X                       To remove Hunt Directory 
						Number (Character 'X')

all           TGAR      0-15                    Trunk Group Access Restriction

X05,X09       ARSQ      0-3                     Automatic Route Selection
						Queue code (normally 0)

X11           NCOS      0-15 0-3                Network Class of service group
X11.2+                  0-15 0-3 0-7            0-15 if NARS Active
						0-3 if BARS/CDP Active
						0-7 if NCFCR Active

all           RNPG      0-127                   Ringing Number pick-up group
X04+                    0-255                   Ringing Number pick-up group

X11           SCI       0-7                     Station Category number
						priority level (Normally 0)

X11           XLST      0-7                     Pretranslation group
						(Normally 0)

all           CLS       (UNR)                   Unrestricted
all                     TLD                     Toll denied
all                     SRE                     Semirestricted
all                     FRE                     Fully restricted
X04+                    CUN                     Conditionally unrestricted
X04+                    CTD                     Conditionally toll denied
X04+                    FR1                     Fully restricted 1
X04+                    FR2                     Fully restricted 2
all                     (DIP)                   Dial pulse
all                     DTN                     Digitone dial
all                     MNL                     Manual service
all                     (XRD)                   Ring again denied
all                     XRA                     Ring again allowed
all                     (XFD)                   Call transfer denied
all                     XFA                     Call transfer allowed
all                     (CWD)                   Call waiting denied
all                     CWA                     Call waiting allowed
all                     (PUA)                   Call pick-up allowed
all                     PUD                     Call pick-up denied
all                     (WTA)                   Warning tone allowed
all                     WTD                     Warning tone denied
all                     (LPR)                   Low priority station
all                     HPR                     High priority station
X04+                    (FND)                   Call forward no-answer denied
X04+                    FNA                     Call forward no-answer allowed
X04+                    (FBD)                   Call forward busy denied
X04+                    FBA                     Call forward busy allowed
X04+                    (ONP)                   On-premise extension
X04+                    OPX                     Off-premise extension
X04+                    (HTD)                   Hunting denied
X04+                    HTA                     Hunting allowed
X05,X09+                (MWD)                   Message waiting denied
X05,X09+                MWA                     Message waiting allowed
X05+                    MCI                     Message center included
X05+                    (MCX)                   Message center excluded
X05,X09+                (LPD)                   Message waiting lamp denied
X05,X09+                LPA                     Message waiting lamp allowed
X11.4+                  (XHD)                   Exclusive hold denied
X11.4+                  XHA                     Exclusive hold allowed

X09+          FCAR      YES                     Set restricted from using
						forced charged account
			(NO)                    Set can use FCA

X05,X09+      FTR       CFW 4-23                Call forward to directory
						number length (normally 4)
X05,X09+                SCC 0-253               Speed call controller list
						number
X05,X09+                SCU 0-253               Speed call user list number
X05,X09+                PHD                     Permanent hold
X09+                    MCD XXXX                Message center directory
						number
X11.2+                  FDN XXXX                Flexible call forward no
						answer directory number
X11.2+                  SSU 0-253               System speed call list number
X11.3+                  RDL 1-31                Stored number redial, maximum
						number of digits allowed 
						(usually 16)
X11.4+                  HOT 1-31 X...X          Flexible hot line, hot line
						directory number length, hot
						line directory number
all                     Xaaa                    Remove feature (aaa=feature 
						mnemonic)


Overlay 20: Print Routine 1
~~~~~~~~~~~~~~~~~~~~~~~~~~~

GENERIC       PROMPTS   RESPONSES               COMMENTS
~~~~~~~       ~~~~~~~   ~~~~~~~~~               ~~~~~~~~

all           REQ       LTN,LUC,LUU,PRT,END     LUC - List unused cards
						LUU - List unused units
						PRT - Print data
						END - Quit this overlay

all           TYPE      aaa                     Prompted when request is PRT,
						which services to print
						ADM - Attendant Administration
						AID - Automatic Identification
						      if outgoing dialing
						ATT - Attendant
						ATVN- Autovon
						CAA - Controlled class of 
						      service allowed
						CAM - Central Admin and
						      Maintenance Trunk
						COT - Central Office Trunk
						CSA - Common control switching
						      arrangement
						DIC - Dictation
						DID - Direct Inward Dial
						DIG - Dial Intercom Group
						DTR - Digitone Receiver
						FEX - Foreign Exchange
						GRP - Group Call
						HNT - Hunting
						MDM - Modem
						MUS - Music
						PAG - Paging
						PWR - Power-only TN card
						RAN - Recorded Announcement
						RCD - Emergency Recorder
						RLM - Release Link Main
						RLR - Release Link Remote
						SCL - Speed Call Lists
						SL1 - SL-1 Set
						TEM - Template
						TDET- Tone Detector
						TIE - Tie Trunk
						TNB - TN Block
						TRK - Trunk
						WAT - WATS
						500 - 500/2500 sets
						2000- Meridian 2000 sets
						3000- M3000 Touch sets
						4020- M4020 Terminal
	       
all           TN                            Terminal Number to print data
						for.  for all.
			lll                     Print data for this loop
			lll s                   for this loop,shelf
			lll s cc                for this loop,shelf,card
			lll s cc uu             for this loop,shelf,card,unit
						Multiple TN's can be entered,
						just end your entry with a
						space and the prompt will
						reappear

X11           CDEN      DD,SD,              Card density, Double, Single,
						 for all.

all           CUST          XX                  Customer Number (0-31)

X11           TEN           0                   Shared customer resource 
						stations
			    1-511               Tenant Service stations
			    XX                  Print data for this customer

X04+          DATE      1-31 JAN-DEC            Date, month and year from 
			19xx                    the date data is to be printed
			                    Print all Data

X04+          PAGE      (NO),YES                Print data on per-page basis

X04+          DES       X...X                   1-6 digit designator
			X+                      All sets starting with DES x
			+                       Sets with no DES assigned
			                    Print All Data

X04+          ADJUST                        Prompted when PAGE is YES
	      PAPER,                            Just tells you to adjust the
	      CR                                Paper in the printer, hit 
			    
X04+          NACT       (NO),YES               Update the activity date? Best
						To choose no.

X11.1-        SCNO       XXXX                   Speed call list number, 
			                    prompted when type is SCL,
						 Prints all.

X11.2+        LSNO       XXX                    List number (0-253).
			                    Print all lists

X11.2+        RNGE       XXX YYY                First and last member numbers
						in range to be printed.
			                    Print all members of the SCL.

all           HNTO       XXXX                   Prompted when type is HNT,
						Hunt number.

X05,X09+      DGRP       XXX                    Prompted when type is DIG
						DIG numbers per customer
			                    All DIG numbers per customer

X05,X09+      DMEN       XX                     Dial intercom member number
			                    All DIG numbers

X05,X09+      GRNO       XX                     Prompted when type is GRP
						Group call number
			                    Print all call group call
						groups

X09+          FOR                               Prompted when type is TEM
			 500                    Print data for 500/2500 sets
			 SL1                    Print data for SL1 sets

X11+          KEY        NO                     Print data for 500/2500 sets
			 YES                    Print data for SL1 sets, 
						Digital and touch sets.

X09+          INFO                              Prompted when type is TEM
			 FRM                    Print key/feature assignment 
						template
			 USE                    Print number of users of 
						template
			 USS                    Print TN using template
			 DEF                    Print number of templates 
						defined and number allowed

X09+          TEM        XXXX                   Template Number
			                    Print all templates

X11+          CPND                              Feature for CPND name display

X11+          EHT        XXXX                   External Hunt DN



Overlay 21: Print Routine 2
~~~~~~~~~~~~~~~~~~~~~~~~~~~

GENERIC       PROMPTS   RESPONSES               COMMENTS
~~~~~~~       ~~~~~~~   ~~~~~~~~~               ~~~~~~~~

all           REQ       PRT,LTM,END             PRT - Print Data
						LTM - List Trunk Members
						END - Quit this overlay

all           TYPE      CDB,CRB,RDB,CASK,SRDT   Prompted when REQ is PRT
						CDB - Customer Data Blocks
						CRB - Code restriction Blocks
						RDB - Route data block
						CASK- Centralize Attendant
						      Service data
						SRDT- Set relocation data

all           CUST      0-31                    Customer Number
			                    Print data for all customers

all           ROUT      0-31                    Route number
			0-127
			                    Print data for all routes

all           ACOD      XX                      Route access code
			                    Print data for all route 
						access codes

Overlay 22: Print Routine 3
~~~~~~~~~~~~~~~~~~~~~~~~~~~

GENERIC       PROMPTS   RESPONSES               COMMENTS
~~~~~~~       ~~~~~~~   ~~~~~~~~~               ~~~~~~~~

all           REQ       ISS,PRT,PWD,ROM,        ISS - Issue and Release Number
			SLL,TID,END             PRT - Print Data
						PWD - Password
						ROM - QPC Number of the ROM
						      daughter board
						TID - Tape ID
						END - Quit this overlay

all           TYPE      AHST,CFN,DNB,DSDN,      Prompted when request is PRT
			PHST,PKG,SCI,REF,       AHST- All of history file
			TST,IMA,APL             CFN - Configuration Record
						DNB - DN Block
						PHST- Part of history file
						PKG - Software Packages
						SCI - Station Category
						      Indication Block
						REF - Loop reference trunk
						      Data
						TST - Loop test trunk data
						IMA - Integrated messaging
						      system
						APL - Auxiliary Processor
						      Link

X11+          PWD2      XXXX                    Administrative password

all           CUST      XX                      Customer Number (0-31)
			                    All Customers

all           DN        XXXX                    Print for Directory # XXXX
			                    Print ALL Directory Numbers
			XXXX             Will allow printing of 
						multiple directories. The DN
						prompt will reappear.

X04+          DATE      1-31 JAN-DEC            Date, month and year from 
			19xx                    the date data is to be printed
			                    Print all Data

X04+          DES       X...X                   1-6 digit designator
			X+                      All sets starting with DES x
			+                       Sets with no DES assigned
			                    Print All Data

X04+          PAGE      (NO),YES                Print data on per-page basis

X04+          ADJUST                        Prompted when PAGE is YES
	      PAPER,                            Just tells you to adjust the
	      CR                                Paper in the printer, hit 
						When ready.

X04+          NACT       (NO),YES               Update the activity date? Best
						To choose no.

	Those are the main overlays used to modify setups and print the system
configuration information. Now you may be asking, where do I find an SL-1?
SL-1's are mainly used in buildings, ranging from department stores to
large office complexes. The dialups are commonly found off of an extension
of the PBX, I've come across several while scanning for VMB's, which are
becoming more common in stores every day. I've never however come across
one while exchange scanning, and I really don't think you would find many
this way.

	Anyways have fun, and remember, knowing is half the battle.

							      ICEMAN

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~