ATT System 25 Reference Manual

							Program
To Program a Number by Using the Code:
1.Lift the handset and listen for dial tone.
2.Dial #4 to enter the Program mode.
3.Dial the number you want to program.
4.Either:
— Press the FLEX DSS or REP DIAL button,
or
— Dial the Personal Speed Dialing code (#20-#39) to indicate where this
number should be stored.
5.   Listen for confirmation tone and dial tone.
6.   To program another number immediately, repeat steps 3 through 5.
7.   Hang up.
To Program a Number by Using the Switch (non-SLAC terminals only):
1.Slide the switch on the left side of the voice terminal to position P.
2.   Lift the handset and listen for dial tone.
3.   Dial the number you want to program.
4.Either:
— Press the FLEX DSS or REP DIAL button,
or
— Dial the Personal Speed Dialing code (#20-#39) to indicate where this
number should be stored.
5.   Listen for confirmation tone and dial tone.
6.   To program another number immediately, repeat steps 3 through 5.
7.Hang up.
8.   Slide the switch back to the midpoint between P and T.
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							FEATURES AND SERVICES
Considerations
The Program feature allows users to
DSS/Repertory Dialing numbers. This is
personnel responsibilities change.assign their own Personal Speed Dialing/Flex
particularly useful where working arrangements or
Users cannot place or answer calls while in the program mode. Incoming calls will receive
Busy Tone.
In the unlikely event that a number contains more digits than are free in the common
Personal Speed Dialing/Repertory Dialing memory (approximately 34100), reorder tone will
be returned after the indication of where this number is to be stored (see Procedures,
above).
Interactions
The following features interact with Program.
Bridging of System Access Buttons: A bridging station user can program only the Personal
Speed Dialing codes, REP DIAL buttons, and FLEX DSS buttons associated with the bridging
station, not with the principal station.
Display: When the user of a display-equipped voice terminal enters Program Mode, a
prompt is displayed on the terminal screen.
Screen 1PROGRAM
Once the user begins to dial digits, the prompt is removed.The dialed digits are displayed,
beginning on Screen 1 and continuing on Screen 2, if necessary.
Screen 12653
Character position 16 on Screen 1 is reserved for queue data, which the system continues to
update for SLACs and DGC terminals.
The Program display remains on screen until the user selects the button or code to be
programmed.
After confirmation tone is returned, the PROGRAM prompt is again displayed.
The user can then go through additional programming sequences, if desired. After
programming is completed, the user can go on-hook or exit from the Program Mode to
Normal Mode by switchhook change (if the mode was entered by dialing #4) or by returning
the PROGRAM switch to its neutral position (non-SLAC terminals).
Remote Access: Remote Access callers cannot use the Program feature.
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							Program
Administration Requirements
Voice Terminal Port:
l Assign FLEX DSS and REP DIAL buttons.
l Allow Personal Speed Dialing on a per-station basis.
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							FEATURES AND SERVICES
Recall
Description
Users of single-line voice terminals that have RECALL buttons can obtain System 25 recall
dial tone by pressing the button. Pressing RECALL is equivalent to briefly pressing and
releasing the switchhook (switchhook flash), which is the required method of getting recall
dial tone at a terminal not equipped with the RECALL button.
Multiline voice terminals are administered for either manual or automatic activation of the
Callback Queuing feature. Operation of the RECALL button is the manual method. Refer to
the “Callback Queuing” feature description for complete information. Use of the RECALL
button for callback does not interfere with its Centrex functions, described in the next
paragraph.
The RECALL button on a multiline voice terminal can be used, under specialized conditions,
to send a switchhook flash to the Central Office (for example, to access Centrex services).
However, it can never be used to send a switchhook flash to the System 25.
Interactions
The following feature interacts with Recall.
Callback Queuing: The RECALL button can be used to send switchhook flash to Centrex
trunks. If a conference exists with a queuable tone and a Centrex trunk, the first push of
RECALL queues the call. A second push of RECALL is needed to send switchhook flash to
the Central Office.
Administration Requirements
For Centrex operation, stations must not be assigned toll restriction, and the Centrex trunks
must be administered as Type 805.
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							Remote Access
Remote Access
Description
This feature allows a caller to dial into a System 25 from the public network using a predetermined
7- or 10-digit number and use some features and services. The caller may be required to dial a
barrier (security) code after reaching the system to access the features and services.
System administration can assign CO, FX, or INWATS trunks for Remote Access calls. These
trunks can be dedicated to Remote Access or shared with other kinds of calling. On dedicated
trunks, all incoming calls receive special Remote Access treatment. On shared trunks, Remote
Access is allowed only during night service times; at other times, incoming calls receive standard
trunk treatment.
If DID service is in use, a DID number (otherwise unassigned) can be administered for Remote
Access. In older releases (with or without barrier codes), the system will answer calls to this DID
number, return special dial tone to the caller and route the call to the attendant. In Release R3V3,
when no barrier code is required
administered for barrier code use,
tone.
Note: For security reasons,
barrier codes.
calls are answered as in the older releases. If the systems is
the call is not completed and the calling party receives reorder
it is NOT recommended that Remote Access be used without
When the system recognizes an incoming call as a Remote Access call, it determines whether the
trunk is shared. If it is, and if night service is not active, the call can be routed to a personal line
appearance or to a DGC group. If neither of these answering points is administered, the call goes to
an attendant for handling.
If the trunk is dedicated to Remote Access or if night service is active, the caller gets special dial
tone. If a barrier code is not required, the caller can now dial the desired number or feature access
code. Calling privileges of the caller are determined by a system-wide default Class of Restriction
(COR).
If a barrier code is required and night service is active after the second dial tone times out
(dedicated or shared remote access service), reorder tone is heard by the caller, unless a Remote
Access Night Service backup station has been assigned. For this case, the back-up station is rung.
If no barrier code is required and dial tone times out, reorder tone is heard by the caller.
If a barrier code is required, the caller dials five or more predetermined digits on hearing the special
dial tone and receives second dial tone if the barrier code matched an administered code. After the
second dial tone, the caller can call an internal number or feature access code, if allowed. The
specific barrier code dialed determines the calling privileges of the user. Up to 16 different barrier
codes can be administered for the system.
When the Remote Access caller is using a rotary voice terminal, dial pulses are not accepted by the
system after the special dial tone is returned. When dial tone times out, the caller hears reorder
tone.
If a bad barrier code is entered, reorder tone will be returned after all administered digits are
entered. If incomplete digits are dialed for the barrier code, an interdigit time out occurs and reorder
tone is applied. For either case, reorder tone remains on the call for 240 seconds, after which, the
call is dropped if the outside originator has not disconnected earlier.
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							Features and Services
If a Remote Access call reaches an inside station, the station can transfer the call back out of the
system, subject to System 25 trunk-to-trunk restrictions and the transferring station’s calling
restrictions. This is allowed even if the caller’s barrier code does not allow a direct call out.
Considerations
Using Remote Access, an employee of a company with a System 25 PBX can access system
facilities from home or other remote locations. This is a valuable feature for salesmen on the road
and people at small branch offices.
Stations receiving Remote Access calls can treat them like any other kind of incoming call and use
features such as Pickup and Forwarding.
Features requiring recall dial tone (for example, Park and Transfer) cannot be used by Remote
Access callers.
Security Considerations
Potential Abuse of the Feature
Unauthorized persons might learn the Remote Access telephone number, call into the System 25,
and make long-distance calls.
Techniques for Minimizing Abuse
1. Program Remote Access to require the caller to enter a password (called a barrier code)
before the System will allow access. Follow secure password procedures as described below:
Choosing Passwords
Passwords should be as many digits as possible and should not be obvious. Avoid those with
ascending digits (e.g.,1234), the same digits (e.g.,0000), digits corresponding to the
employee’s name (e.g., 5646 for John), the current year (e.g., 1993), the same number as
extension (e.g., extension 3455, password 3455), reverse extension (e.g., extension 3455,
password 5543), numbers that identify the user (e.g., social security, employee ID, room
number, etc.)
Establishing a Policy
As a safeguard against toll fraud, change passwords frequently. Set password expiration times
and tell users when the changes go into effect. Changing passwords routinely on a specific
date (such as the first of the month) helps users to remember to do so.
2. Block out-of-hours calling through Remote Access whenever possible.
3. Use the toll-restriction capabilities of your System 25 to restrict the long-distance calling ability
of Remote Access users as much as possible consistent with the needs of your business.
4. Protect your Remote Access telephone number. Only give it to people who need to know it,
and impress upon them the need to keep it secret.
5. Monitor your SMDR records and/or your Call Accounting System reports regularly for signs of
irregular calls.
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							Remote Access
Interactions
The following features interact with Remote Access.
Account Code Entry: This feature cannot be used by Remote Access callers.
Call Accountability: This feature cannot be used by Remote Access callers.
Calling Restrictions: A barrier code class of restriction (COR) has the same parameters as the
class of service permissions associated with stations. A system-wide default COR must be
administered for use if barrier codes are disabled. Barrier code CORs override the default COR.
Conference: This feature cannot be used by Remote Access callers.
Display: Since remote access calls are all incoming calls, the display at the receiving station
displays the trunk identification (assigned by user). Without a display, the receiving station has no
special indication that this is a remote access call.
A display set user who bridges onto a Personal Line appearance where a remote access call is
active will have the display updated for conference status.
Note that Remote Access trunks should be administered to visually identify them as such.
Direct Group Calling (DGC): Remote Access callers cannot attempt to log in or out of a DGC
group.
Equal Access: Equal Access will not be allowed when entered from a Remote Access trunk after
connection of an outgoing trunk. A reorder tone is added to the call when Equal Access is dialed.
Following: This feature cannot be used by Remote Access callers.
Forwarding: Remote Access calls to a System 25 station that has the Forwarding feature activated
will forward like any other incoming calls to the station.
Hold: This feature cannot be used by Remote Access callers.
Night Service, Directed: Remote Access trunks (dedicated or shared) cannot be given Directed
Night Service treatment.
Night Service, Trunk-Answer-from-Any-Station (TAAS): Remote Access trunks (dedicated or
shared) cannot be given TAAS Night Service treatment. Remote Access callers cannot answer
TAAS Night Service calls.
Park: This feature cannot be used by Remote Access callers.
Pickup: This feature cannot be used by Remote Access callers.
Personal Line: If a Remote Access trunk appears as a Personal Line on a station, and the call is
picked up at any time, any tone in the call will be removed and if the station is a display set, it will
indicate the trunk associated with the call.
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							Features and Services
Program Mode: This feature cannot be used by Remote Access callers.
Remote Initialization and Maintenance Service (RIMS): RIMS requires a unique barrier code and
carries special non-administrable restrictions.
Speed Dialing, Personal: This feature cannot be used by Remote Access callers.
Station Message Detail Recording (SMDR): Remote Access calls are included in the SMDR
records. The following unique data is presented for Remote Access calls (in addition to type, data,
time, and duration).
Remote Access-to Inside Number:
l CALLED NUMBER field IN.
l FAC field—the number of the incoming trunk.
l STN field—the dial code of the called party; if the call timed out without any digit having
been dialed, the call goes to the attendant, and the attendant’s PDC is shown.
l ACCOUNT field—the Barrier Code number.
Remote Access-to-Outside Number:
l CALLED NUMBER field—the outside number dialed by the remote caller,
l FAC field—the number of the outgoing trunk or trunk pool.
l STN field—the number of the incoming trunk.
l ACCOUNT field—the Barrier Code number.
A Remote Access call which timed out before barrier code dialing was complete or which had a
non-matching barrier code will be shown in the Station Message Detail Recording, regardless of
how long the call lasted. (For systems using a CAT, bad barrier code calls or remote access timeout
calls less than 30 seconds are shown as having a duration of 30 seconds to assure their display.)
To provide greater clarity associated with the types of failed Remote Access calls, the ACCOUNT
field displays the following:
Non-CAT
l Bad Barrier Code - “BADBC_MATCHED##”
Note: ## is 00 through 14 and indicates the number of digits matched for the best
matched barrier code in the system.
l Incomplete Barrier Code - “RACCESS_TIMEOUT”
CAT
l Bad Barrier Code -“80” through “94.” (Note: 80 through 94 indicates the number of digits
most closely matching a barrier code in the system; e.g., 80 indicates zero digits matching;
81, one digit; 82, two digits; etc.)
l Incomplete Barrier Code or Time Out - “70”
Transfer: This feature cannot be used by Remote Access callers.
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							Remote Access
Administration Requirements
System:
l Enable barrier codes (yes or no; default = yes).
l Assign DID remote access number (PDC or 0; default = 0).
l Assign system default COR for Remote Access:
— ARS Facility Restriction Level (0 to 3; default = 3).
— Toll Restriction Calls (1 to 4 or 0 for none; default = 0).
— Outward Restricted? (yes or no; default = no).
— “CO pool” dial restricted? (yes or no; default = no).
— “Other pools” dial restricted? (yes or no; default = no).
l For each barrier code defined: (Note: Set these values for the required level of security.)
— Barrier code length (5-15 digits); changing this value clears previously entered barrier
codes.
— Barrier code number (1 to 16).
— Barrier code digits (5 through 15 characters or enter 0 to remove; valid characters are 0
to 9, * and #).
— Assign barrier code’s COR:
ARS Facility Restriction Level (0 to 3; default = 3).
Toll Restriction Class (1 to 4 or 0 for none; default = 0).
Outward Restricted? (yes or no; default= no).
“CO pool” dial restricted? (yes or no; default= no).
“Other pools” dial restricted? (yes or no; default= no).
— Assign Remote Access Night Service “backup” multiline station (PDC or 0; default = 0).
— Assign RIMS barrier codes digits (5 through 15 digits [0 to 9, *, #] or 0 to remove;
default= 98765. Note: This default may require changing to satisfy security
requirements.).
Trunk Port:
l Specify Remote Access usage (no, shared, or dedicated; default = no).
SMDR type of peripheral:
l To identify CAT or non-CAT type of peripheral (yes for CAT, no for non-CAT; default= no).
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							Features and Services
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