ATT System 25 Reference Manual

							Display
Considerations
The Display feature provides valuable call information with a minimum of effort on the part of
the voice terminal user.
Interactions
The following features interact with Display Capabilities.
Attendant Console, Direct Trunk: Display capabilities are not supported for this type of
console.
Bridging of System Access Buttons:All stations sharing a bridged appearance—that is, the
principal station and the bridging station(s)—and having ringing enabled for the appearance
will receive standard call information display on incoming calls. After one station answers
the call, the bridging station continues to display the call information until the user receives
or places another call, the original call ends, or the other station invokes Exclusion.
A bridged appearance user with delayed ringing does not receive incoming call information
until ringing starts.
Any station having a bridged appearance can examine the active call information for the
appearance by using the Inspect feature, unless Exclusion has been invoked.
If a user at a principal station or a bridging station places a call on a bridged button,
outgoing call information is displayed only at the calling station. Other stations sharing the
appearance can use the Inspect feature to display the call information.
A user having a bridged appearance can bridge onto a call being originated at a bridged
station. In general, the bridging station receives the same call display as the bridged station,
but only after dialing has been completed.Conference information is generated and
displayed at bridged and bridging stations.
When a user attempts to either bridge onto or Inspect a call, where Exclusion has been
invoked by another active party on this call, the screen display shows EXCLUDED.
Callback Queuing: If a user with Automatic Incoming Call ID is off-hook when a callback
attempt is made, the display will not flash the callback call’s information. However, this
information is accessible via the Inspection feature.
Call Waiting: If a display station has Automatic Incoming Call Identification active, call
waiting tone is accompanied by an incoming call message flashed on the screen. The user
cannot Inspect the message again, because all buttons are busy with other calls. When the
user answers a waiting call, the display updates to standard incoming call format.
Conference: When a queued call is added to a conference, the associated displays are
modified in only one respect; the Q symbol appears as the first character of the queued call
display. When the queued facility becomes available and the call is made, “Q” is removed.
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							FEATURES AND SERVICES
When a nondisplay station originates a trunk call, then conferences the call with an inside
display station and drops off the display shows the trunk name only, not the originally-dialed
digits.
Message Waiting Indications:When a display set user dials #90 (or #91) followed by an
extension number to light (or extinguish) a Message LED at some station, the dialed digits
are displayed. A confirmation of Message LED activation or deactivation is not displayed.
Remote Access:Since remote access calls are all incoming trunk calls, the display at the
receiving station has the standard“reception of outside calls” format. 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.
Administration Requirements
To implement the Display feature, the following administration items are required.
l Assign display voice terminals.
l Assign LOCAL, SCROLL, and INSPECT buttons on the non-SLAC sets.
l Assign DIRECTORY, CALL, and NEXT buttons to all display sets, including SLACs.
l For each nonattendant display station:
1. Is this a display station? (yes or no; default = no; change to “yes”).
2. Enable Automatic Incoming Call Identification? (yes or no; default = no). If
this feature is desired, and Step 1 was set to “yes,” no action is necessary; if
not desired, set to “no.”
l Set up the system’s integrated directory, giving a Display ID for PDCs, DDCs, DGC
groups, DID trunk group, other trunks, and attendant (PDC 0).
Hardware Requirements
To have display capability, a station must be equipped with a Model
Voice Terminal or a Model 7317H01A Multiline Voice Terminal (BIS-34D).7305H04C Multiline
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							Distinctive Ringing
Distinctive Ringing
Description
This feature allows users to distinguish between different types of incoming calls. The
system provides the following types of ringing:
l A repeated two-burst tone indicates an outside call or a call extended by the
attendant. The two-burst tone pattern is: 0.4 seconds on, 0.2 seconds off, 0.6
seconds on, and 4.0 seconds off.
l A repeated one-burst pattern indicates a call from an internal user. The tone is one
second on and three seconds off for multiline voice terminals, and 1.2 seconds on
and 4 seconds off for single-line voice terminals.
l A “abbreviated alerting” signal (also called single-ring reminder) indicates to the off-
hook user of a multiline voice terminal that a new call is coming into another call
appearance button. This type of call rings just once, but the associated status LED
continues to flash after the abbreviated alerting stops. The user may place the
current call on hold and answer the incoming call if desired.
l A single short beep at a voice terminal equipped with the Hands-Free Answer feature
indicates that an incoming inside call has been answered by the terminal. Depending
on the status of the terminal’s HFAI controls, the user can talk with the caller without
lifting the handset.
l Priority ringing is a repeated pattern of two short rings followed by one long ring. It
indicates (1) that a data terminal has used the Third-Party Call Setup feature to
originate a voice call from the voice terminal where this ringing is heard, or (2) that a
queued-for facility is now available and the user can go off hook for the call to be
completed.
Considerations
Distinctive Ringing enables a user to handle each call in an appropriate
Abbreviated alerting notifies the busy called party of an incoming call
distraction of continued ringing.
Distinctive ringing is not available at Extended Stations; all incoming
standard one-burst ringing, repeated.
Interactions
The following feature
Coverage: Covering
receiving coverage.interacts with Distinctive Ringing.
stations receive distinctive ringing,depending onmanner.
without the annoying
calls are signaled by
the origin of the call
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							FEATURES AND SERVICES
End-To-End Signaling
Description
This feature allows multiline voice terminals to send touch-tone (DTMF) signals over the DDD
network and allows single-line and multiline users to send touch-tones over dial pulse trunks.
The 7300H series voice terminals do not generate touch-tones when a dial pad button is
pressed. The End-to-End Signaling feature provides for the conversion of signals generated
by these terminals to touch-tones.
Dialed numbers from multiline voice terminals are toned out for a default duration of 60 ms
followed by 60 ms of silence (administrable). Dialed numbers to single-line voice ports are
toned out for a default duration of 60 ms followed by 60 ms of silence (administrable).
When using dial pulse trunks, End-to-End signaling is invoked by dialing “#” after the last
digit of the called number or waiting for about 10 seconds after dialing the last digit (see the
Interdigit Timeouts feature description).All subsequent dial pad button presses generate
touch-tones on the outside line.
Considerations
End-to-End Signaling permits stations to access network services that require touch-tone
signals.
Interactions
The following features interact with End-To-End Signaling.
Command Mode And Data Terminal Dialing: occasionally it is necessary to send additional
tones to the remote endpoint after a data connection has been established. A mark
character“$” is embedded in the dialing sequence to indicate to call processing that
additional tones must be sent prior to insertion of a conversion resource (pooled modem)
into the connection. The mark character “$” is used to indicate that all the following digits
are for end-to-end signaling. This character is used to mark the boundary between the digits
dialed to reach the distant endpoint and the digits used by the distant endpoint after it
answers.
Repertory Dialing:Repertory Dialing can be programmed on the 7300H series voice
terminals. End-to-End Signaling works properly with this feature.
Speed Dialing: #8 must be stored to start End-to-End Signaling
Virtual Facilities: #8 must be stored to start End-to-End Signaling.
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							Exclusion
Exclusion
Description
This feature allows multiline voice terminal users to keep other users with appearances of
the same Personal Line from listening in on or interrupting their calls. It can also be used in
a Principal Station/Bridging Station arrangement by either party to exclude other inside
stations from a private call.Exclusion allows users to exclude the attendant and other
stations from an existing or held call, or to drop other System 25 users from a call.
The EXCLUSION button status and I-use LEDs are lighted steadily when the feature is
invoked. When an excluded call is placed on hold, the EXCLUSION button’s I-use LED goes
dark and the status LED winks with the LED of the held line.
Exclusion can be applied to only one call at a time. Once Exclusion is invoked on a call it will
remain active until the user either presses the button a second time or disconnects the call.
Considerations
Exclusion allows the sharing of a Personal Line or a bridged System Access (SA)
appearance by several users while retaining privacy for each one.
Pressing the EXCLUSION button at any time during a call, regardless of how the call was
originated, drops all other inside stations and tones.An inside party can be included on a
private call by pressing EXCLUSION first and then adding the inside party.
Interactions
The following features interact with Exclusion.
Automatic Intercom:Any attempt to activate Exclusion while active on an Automatic
Intercom call will drop the other party.
Bridging of System Access Buttons:If a principal or bridging station presses the
EXCLUSION button during a call, all other internal stations on the call will be dropped. In
addition, Exclusion will prevent any other internal station from bridging onto the call.
Callback Queuing: Pressing the EXCLUSION button does not drop a queued call. The
EXCLUSION button’s status LED tracks the status LED of the associated call button. For
example, on a callback attempt, the EXCLUSION LED will also change from winking to
flashing. If the EXCLUSION button is tracking a conference on hold, it will stay winking with
the rest of the conference. When the callback attempt is answered, the EXCLUSION LED
lights steadily to track all the conference buttons.
Conference: When Exclusion is invoked, all other inside parties will be dropped. If a private
conference including inside parties is desired, the user should activate Exclusion first and
then set up the conference.
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							FEATURES AND SERVICES
Coverage: If a coverage receiver invokes Exclusion after answering a coverage call, all other
terminals (including the attendant and the covered station) are excluded. The covered user
cannot enter the call until Exclusion is pressed a second time by the covering user.
Display: When a display station attempts to enter a personal line or bridged appearance that
has the Exclusion feature in effect, EXCLUDED is displayed.
Hold: A call can be placed on hold after Exclusion is invoked. The I-use LED will go dark;
the status LED of the line appearance button and the Exclusion button will wink.
Administration Requirements
Voice Terminal Port:
l Assign EXCLUSION button.
2-174 
						

							Expert Mode
Expert Mode
Description
Expert Mode is an enhancement to the Command Mode feature that provides an alternative
method of performing the full range of Command Mode functions. By eliminating the display
of menus and allowing multiple commands to be entered on a single line, Expert Mode lends
itself to computer-driven instructions.Individual users who are very familiar with Command
Mode operations may also find it useful.
When Expert Mode is activated, a system administrable prompt is displayed that can consist
of up to nine characters (the quote character and RETURN are not allowed). Command: is
the system default prompt.As with dialing in Command Mode, the ASCII characters
backspace (BS or CTRL-H) or underscore (_) may be used to cancel a previously entered
character. When in Expert Mode, each line must be terminated with a keyboard RETURN.
Users of Expert Mode must follow the exact tree structure of Command Mode (both up and
down the menu tree) as shown in Figure 2-62. However, instead of moving one level at a
time, Expert Mode allows the user to move up or down several menu levels at once. This
can be accomplished by entering, on a single command line, the capitalized letters that
define the sequence of menu selections desired.For example, to change data port panty
from the tree’s entry level, the user types OCPE and presses RETURN. This requests that
parity be set to “even”,but does NOT enable the change. To enable this change (see Figure
2-62), the user must now type XE and press RETURN.
Activating Expert Mode
A user can move back and forth between Command Mode and Expert Mode by typing “!”
(exclamation mark). For ports on a Data Line circuit pack (Data Line Card, DLC), either
Command Mode or Expert Mode is presented at the start of a new session, depending upon
the port’s setting at the termination of the previous session. Thus, if a data session ends in
Expert Mode, the next session will begin in Expert Mode. However, calls from an AT&T
STARLAN NETWORK to System 25 will always begin a new session in Command Mode.
An alternative command, “>”,can be used to guarantee entry into Expert Mode. Conversely,
guaranteed entry into Command Mode can be accomplished with the command “>!”
followed by RETURN.These commands are especially useful for computer-driven DLC
endpoints that might otherwise have difficulty detecting whether a new session had been
started in Expert Mode or Command Mode.
Making a Data Call
To make a data call from the entry level (see Figure 2-62), the user enters “D” following the
system prompt and then the data endpoint number. For example:
Command: D9,5553822
“Command:” on the above line is the default system prompt while in Expert Mode. The user
enters all data following the prompt.
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If the user enters “D” and then a RETURN, the system will prompt for the data endpoint
number as follows:
Command: D
DIAL:
The user must then enter the digits required to complete the call.
Activating the Third-Party Call Setup Feature
The following provides an abbreviated method of using the Third-Party Call Setup feature
while in the Expert Mode. A complete description of this feature is provided later in this
manual.
To activate the Third-Party Call Setup feature and place a call, the user enters numbers
using the following format:
Command: V{Destination} F {Source}
The V on the above command line provides access to  from the Command
Mode entry level menu.The balance of the dialed number is composed of destination and
source numbers, as described in the Third-Party Call Setup feature description.
User Changeable Options
Refer to the User Changeable Options feature (discussed later) for a detailed description of
the feature. The menus selected in the following discussion are shown in Figure 2-62.
To view the current Options Table (starting at the Command Mode entry level), the user
simply enters “OV” following the system prompt, as follows:
Command: OV
To change the current Options Table (starting at the entry level), the user enters “OC” as
follows:
Command: OC
Entering “OC” places the user at the Change Options level. At this point the user may
change options by entering the appropriate letter to indicate the required option (S for
Speed, P for Parity, M for Mismatch, etc.) followed by the desired setting(s). Only one
Option is allowed per line. If more than one setting is selected for an Option that can only
accept one setting, call processing recognizes only the last entry.
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							Expert Mode
Examples:
Command: S +1200 -300 +4800Add 1200 and 4800 baud to the available
speeds, remove 300 baud
Command: PEChange Parity to Even
Command: MYChange Mismatch to Yes
If the user enters an invalid Option or setting, the system responds with INVALID OPTION and the
entry is ignored.
Once all changes have been entered, the user enters XE to enable the options.
Considerations
Expert Mode is primarily for use by computer-driven endpoints that can store command sequences
for automated use. However, a user experienced in accessing Command Mode menus may find
Expert Mode to be a faster alternative when operating at slower speeds, since the time required to
display each menu and to input separate commands is essentially deleted.
interactions
The following feature interacts with Expert Mode.
Command Mode: Refer to the Command Mode feature description for a detailed description of
Command Mode and of the various menu items.
Administration Requirements
The data port associated with a data terminal can be administered to allow the user to change
options when in Command or Expert Mode. Otherwise, the user may view the current options but
not change them.
The default prompt for Expert Mode (Command:) maybe changed via system administration.
November 19952-177 
						

							Features and Services
Extended Stations
Description
Allows single-line voice terminals to be located at distances from 2000 to 17,500 feet from the
systems cabinets.
Extended stations have the same feature capability as other voice terminals. These stations count
as an outside party on conference calls.
Transmit and receive levels are increased at extended stations for conferencing.
Considerations
A single-line voice terminal must be administered as an extended station before this feature is
activated.
Extended stations will always receive standard (that is, single) ring for calls; System 25 will not send
distinctive ringing.
Interactions
The following feature interacts with Extended Stations.
Conference: An Extended Station counts as one of the two outside parties allowed on conference
calls.
Administration Requirements
Single-Line Voice Terminal Port
l Assign port on Analog Line (TN742 or TN746) CP.
l Make This An Extended Station (yes or no; default = no).
Hardware Requirements
The extended Station must be a single-line voice terminal. It requires a port on a TN742 Analog Line
CP.
2-178November 1995