ATT System 25 Reference Manual

Direct Group Calling (DGC)
Personal Lines:An outside line directed to a DGC group can be assigned button
appearances in addition to the DGC group assignment. When an incoming call is ringing at a
DGC group, the status LED on the voice terminal button appearance lights steadily, indicating
that the line is busy.If the call goes unanswered for a pre-determined amount of time (up to
255 seconds) (and no delay announcement is provided), ringing will be transferred to all
button appearances of the line and...

FEATURES AND SERVICES
Direct Group Calling Delay Announcement
Description
This feature provides a recorded announcement to an outside (trunk) caller who has been
placed in queue for a DGC Group.
When all members in the group are busy (off-hook), the call will be queued for DGC service
and the calling party will receive ringback tone.Note that no incoming call indication (ringing)
is provided to the DGC group members at this point.After a specified amount of time (up to
255 seconds) (administrable) a...

Direct Group Calling Delay Announcement
Hardware Requirements
The announcement device must automatically hang up at the end of each call so that the
incoming call can be returned to the DGC queue.
Each announcement device requires a port on a ZTN78 Tip Ring Line (or TN742 Analog Line)
CP. The system supports up to 32 DGC delay announcements.
For Music-On-Hold hardware information, refer to the “Music-On-Hold” feature description.
Detailed connection information is provided in Figure 2-25.
Descriptions of...

FEATURES AND SERVICES
Direct Inward Dialing (DID)
Description
Direct Inward Dialing (DID) allows incoming dialpulse type calls to reach specific individuals
or facilities in the system without attendant assistance.
System 25 customers reserve blocks of DID numbers from the CO. The DID numbers may
correspond to a PDC, FPDC, DGC access code, DDC, or any facility with an access code
such as a pooled facility or a paging zone.
The system is capable of receiving either 1, 2, 3, or 4 digits over its DID...

Direct Inward Dialing (DID)
Interactions
The following features interact with Direct Inward Dialing.
Attendant Camp-On: DID calls are not provided Attendant Camp-On treatment. They will not
appear on the Direct Trunk Attendant Console Return-On-Busy or Return-On-Don’t-Answer
buttons or on the Switched Loop Attendant Console Loop buttons unless they are first answered
at the attendant position and are subsequently extended by the attendant.
Attendant Direct Extension Selection: Selector Console LEDs...

FEATURES AND SERVICES
Pooled Facility Access: Access to pooled facilities via DID is permitted. This includes access
to WATS, FX, tie trunks, private lines, dictation equipment, and paging systems. This access is
provided by selecting facility access codes so that they will match DID numbers.
Warning:Matching DID numbers to FACs may open the way for unauthorized
calls which will be billed to the outgoing trunk.
Remote Access: A valid DID number can be assigned for Remote Access calls into the system....

Directory
Directory
Description
This feature allows the user of a voice terminal where the Display feature is administered to
search the system’s integrated directory data base for the extension numbers associated
with specific names. Information resulting from the use of Directory is displayed on the voice
terminal’s screen.
The user enters Directory Mode from Normal Mode by pressing the DIRECTORY button.
The system presents the following display to prompt the user to enter a name using the dial
pad...

FEATURES AND SERVICES
The user of a non-attendant display set can exit from Directory Mode directly to Program
Mode by moving the program switch on the left side of the terminal to position P. However,
to reenter Directory, the user must first go from Program to Normal and then press
DIRECTORY.
The user can return from Directory Mode to either Normal Mode or Local Mode by any of the
following actions:
l Press DIRECTORY again.
l Allow timeout to occur after 15 seconds with no operation of other buttons...

Directory
Administration Requirements
Administration of the Display feature enables Directory.
Hardware Requirements
The Directory feature can be used only at display-equipped multiline voice terminals
2-157 

FEATURES AND SERVICES
Direct Station Selection (DSS)
Description
Direct Station Selection (DSS) allows one-button access to another voice terminal, a paging
zone, or a DGC Group. DSS requires a button assignment on a multiline voice terminal.
There are two types of DSS buttons.Numbers stored on DSS buttons (maximum of four
digits) are programmed at the SAT; numbers stored on Flexible DSS buttons (maximum of
four digits) are programmed at the voice terminal.The procedure for programming FLEX
DSS buttons...