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...

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...

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...

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...

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...

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....

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...

FEATURES AND SERVICES
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...

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....

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....