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 the status LED will flash.
Pickup: A DGC group member can also be a member of a Pickup group.
Remote Access: Remote Access callers cannot log into or out of a DGC group.
Station Message Detail Recording (SMDR): For an incoming call to a DGC group that was
connected to an announcement but was never answered,“0” will be reported in the “STN”
field of the call record.If the call was answered by a station after receiving the
announcement, that station will be listed in the “STN” field.
Tie Trunks: Calls to a busy DGC group via tie trunks will be queued and will receive a delay
announcement, if available.
Transfer:Internal stations can transfer outside (trunk) calls to a busy DGC group. The
transferred call will be treated as any other trunk call to a busy DGC group. The transferring
party will hear Busy tone, but the transfer will complete. The call will queue and the calling
party will receive delay announcement, if available.
Administration Requirements
Trunk Ports:
l Assign trunks to DGC Group.
l Assign trunks to ring in SLAC queue.
System:
l Assign amount of time (up to 255 seconds) before DGC calls are transferred to
announcement or begin ringing at button appearances or SLAC queue.
Direct Group Calling:
l Assign DGC access code, add/delete DGC members, enable/disable queuing for data
DGC groups.
l Assign delay announcement (1-32).
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							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 recorded announcement will be played to the calling party
without disturbing his or her position in queue.The caller is subsequently placed on hold
and will receive music if available.
Once a call begins to ring at a DGC station,the call is no longer eligible for delay
announcement service.The call will then ring until answered, covered, picked up, or
abandoned.
Considerations
An individual (unique) announcement can be provided for each group, for several groups, or
for all DGCs in the system.Each DGC group can have one announcement (32 maximum).
DGC Delay Announcements provide the calling party with a message that acknowledges their
call and assures them that their call will be handled in an orderly way.
An extension number is administered for each DGC delay announcement device, permitting
users to change
only.
Interactions
the announcement. The extension number is restricted to authorized users
The following feature interacts with Direct Group Calling Delay Announcement.
Tie Trunks: Calls to busy DGC groups via tie trunks will be queued and will receive the delay
announcement, if available.
Administration Requirements
Each DGC announcement device requires a port assignment on a ZTN78 Tip Ring Line or
TN742 Analog Line CP.Individual DGC groups are assigned to a particular announcement.
Up to 32 groups may be assigned to announcements.
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							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 the SIP (Station Interconnect Panel), TAE (Trunk Access Equipment). and
associated cables and adapters, as shown on the figures, are provided under the heading
“Connectivity” in Section 4.
SYSTEM 25
CABINET
PART OF
OCTOPUS
PART OF
CABLE
SIP
TN742
C2SIPW1
>C5DELAYOR
ADAPT.B1> ANNOUNCEMENT
ZTN78EQUIPMENT
LEGEND:
TN742 -
ZTN78 -B1 -
C2 -
C5 -
W1 -
*-
Figure 2-25.
ANALOG LINE CPTIP RING CPTYPICAL-103A CONNECTING BLOCK*
OCTOPUS CABLE (WP90780) - PEC 2720-05P
M0DULAR CORD (D4BU-87)
4-PAIR INSIDE WIRING CABLE*
FURNISHED BY INSTALLER
Delay Announcement Equipment Connections (FCC Registered)
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							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 trunks. The number
of digits received on a specific DID trunk will be constant for that trunk; however, different
DID trunks may receive different numbers of digits.The system is capable of receiving up to
four digits and then ignoring leading digits as specified to match against system dial codes.
For example, the dial code matching DID number NXX-2157 can be 57, 157, or 2157. If the
System 25 is administered to match on more digits than are received from the Central Office
(CO), the additional leading digits are taken from the 4-digit trunk number. For example: if a
call comes in on DID trunk number 1234, the CO sends two digits (77) over this trunk to
identify the recipient, and System 25 is administered to match on three digits, then the call
will be routed to dial code 277.
Incoming DID numbers that don’t match any valid dial code may optionally be directed to the
Attendant Console or to Reorder Tone.
If the DID number received is a valid dial code, the caller is provided either Ringback Tone,
Busy Tone, or the tone from a pooled facility (e.g., Dial Tone) as soon as addressing is
completed. Busy Tone is provided if and only if the call cannot be completed to the intended
voice terminal and cannot be provided coverage.
DID calls appear at System Access buttons on multiline voice terminals (they do not have
other button appearances). These calls can be transferred to a covering station, answered
via Pickup, directed to a DGC Group, or given Station Hunting, Following, or Forwarding
treatment. A DID call is not automatically covered on the Attendant Console.
DID trunks may utilize DID Immediate Start or Wink Start protocols, but must be dial pulse
(touch-tone DID trunks are not supported).Refer to Section 9, Glossary, for a brief
description of each of these trunk types.
Considerations
Direct Inward Dialing frees the attendant from handling certain incoming calls.
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							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 respond to DID calls just as
they do for other outside calls. When a user answers a DID call, the associated LED on the
Selector Console will light steadily. When a DID call arrives at the attendant position for
coverage, the LED associated with the coverage sender will flash and will then go dark when the
call is answered. However, if the call is placed directly to the attendant position or is forwarded to
the position and thereby arrives on a System Access button or a Loop button (e.g., if a DID PDC
is signed-in at the attendant position), then no LED indications on the Selector Console will be
provided. If a DID call is directed to the answering position and is subsequently extended to a
station, then the LED on the Selector Console associated with the station will flash if the call
returns to the answering position. The LED will light steadily if the call is answered by the station.
Call Waiting: Incoming DID trunk calls do not wait at busy stations; they receive busy tone.
Conference: For conference purposes, DID calls count as one of two allowable outside parties.
Coverage: DID calls receive standard coverage treatment.
Dictation System Access: A DID number may be associated with the dictation system access
code. This allows an outside caller to access the dictation equipment.
Direct Group Calling: A DID call will be directed to a DGC group if the DID number matches the
DGC group access code.
Night Service: DID calls do not receive Night Service treatment. A DID call will ring at the
appropriate station whether Night Service is activated or not.
Off-Premises Stations (OPS): DID calls can be directed to OPS.
Paging System Access: A DID call may access a paging zone. This allows the user to dial in
and utilize the Paging feature. Dial restricting the paging code will block this interaction.
Personal Dial Codes: DID calls will be redirected to PDCs signed in at other terminals in the
system. DID calls to an unassigned PDC or a FPDC that is not signed in will be either redirected
to the attendant or receive Reorder Tone.
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							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.
Station Message Detail Recording (SMDR): Only one SMDR record is produced if an outgoing
call is originated by a DID trunk. The STN field will contain the DID trunk’s 4-digit number, the
FAC field will contain the facility access code of the trunk group used to complete the call, and
the CALLED NUMBER field will contain the called number.
Administration Requirements
System:
l Send calls for unassigned DID numbers to the Attendant Console (yes or no; default =
yes).
l Set number of DID digits matched against dial codes (2-4, none; default = 3).
Trunk Port:
l DID trunk type (Immediate Dial, Wink Start)
l Number of digits to be received from CO on this trunk; default = 3.
Hardware Requirements
Each DID trunk requires a port on a TN753 DID Trunk CP.
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							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 buttons and then dial # to mark the end of the search entry.
Screen 1DIR: ENTER NAME#
The dial pad buttons are labeled with all the necessary entry characters except as follows:
l Q is entered by pressing button 7 (PRS).
l Z is entered by pressing button 9 (WXY).
l Space, comma, or dot is entered by pressing the V button
The directory prompt, DIR: ENTER NAME#, remains displayed on the screen until the user
finishes entering the characters of the name and presses #. (It is often unnecessary to enter
a full name, but whatever is entered must be terminated by #.) The system then searches
the directory data base for a match between the entered characters and the stored names.
If none is found, the prompt is removed and NO MATCH FOUND is displayed. Otherwise,
directory information is presented as shown in the following example:
Screen 1D645 Wiggins,G
The D in position 1 indicates that the Directory Mode is active.
If the name is not the correct one, the NEXT button allows the user to request that the next
matched name be displayed. This operation can be repeated. As an alternative, the user
can narrow the search by entering additional letters followed by #. The additional letters are
added to the end of the previously-entered search string.If a mistake is made, the user can
press DIRECTORY twice (to exit and reenter the mode) and try to enter the desired name
again.
If the user reaches the end of a matched list, NO MATCH FOUND is displayed. The user can
return to the first matched name by pressing NEXT again.
When the displayed name is the correct one, the user can call the number by pressing the
CALL button. If the terminal is on-hook, the speakerphone will turn on automatically.
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							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 (such as
NEXT).
l Change switchhook state; if the user goes on-hook, the terminal returns to Normal or
Local Mode; if the user goes off-hook, the terminal returns to Normal Mode.
l Select a call
Considerations
appearance button; the terminal returns to Normal Mode.
The Directory feature is most effective if the system administrator enters names in the data
base in a last name/comma/first initial format.Characters other than letters and numbers
(and commas) are discouraged.However, the system does not enforce these rules. A
maximum of eleven characters can be entered for a name in the data base, but only nine can
be displayed.
Activating the Directory Mode has the following impact on terminal operation:
l Hands-Free Answer on Intercom (HFAI) is disabled.
l If the user is on-hook but has a call on hold, there is no effect on the call.
l If the user is off-hook and in the midst of dialing, the system disconnects the call.
l If the user is off-hook and has completed dialing, there is no effect on the call.
l Automatic Incoming Call Identification (see the “Display” feature description) is
suppressed.
l Calls can be originated only by using the CALL button.
l Incoming calls ring and flash, but answering a call will change the terminal from
Directory Mode to Normal Mode.
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							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
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							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 is provided in the “Program” feature description.
To use DSS, the user presses DSS or FLEX DSS and goes off-hook. The caller hears
Ringback Tone.DSS calls to a multiline voice terminal are received on a System Access
button. The DSS status LED is lighted steadily at the calling station.
The DSS status LED is lighted whenever the pointed-to station is off-hook. The user may
press DSS and remain on-hook to receive the busy-to-idle reminder. The user’s voice
terminal will ring once when the other party hangs up; lifting the handset will automatically
place the call.
When Prime Line Preference is assigned to a DSS button, the button must be pressed to
invoke the busy-to-idle reminder, even though the I-Use LED is lighted.
Access to Paging Zones and DGC Groups:
DSS (not FLEX DSS) access is provided to an individual Paging Zone or to all paging zones
or to a DGC group. If the paging zone(s) is administered to be dial restricted, users assigned
DSS buttons with paging access codes can still access the paging equipment. The status
and busy-to-idle reminder indication described above also apply to DGC groups with the
understanding that a DGC group is busy if all members in that group are busy.
Considerations
Direct Station Selection differs from Automatic Intercom in that it provides one-button access
from one voice terminal to another (one-way only), while Automatic Intercom provides similar
access for each voice terminal (two-way) and must be assigned between two multiline voice
terminals. A DSS button may point to a single-line station; an Automatic Intercom button
may not. DSS calls receive coverage, Automatic Intercom calls do not.
Interactions
The following features interact with Direct Station Selection.
Bridging of System Access Buttons:Calls from DSS or FLEX DSS buttons on the principal
station are not accessible from Bridged Access buttons on the bridging station.
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