ATT System 25 Reference Manual

							Attendant Console, Direct Trunk
l Start [START]: Initiates the call-extending process by placing a caller on hold and
providing internal dial tone to the attendant.
l Cancel [CANCEL]: Terminates the “START” operation and reconnects the attendant to the
calling party.
l Release [RELEASE]: Releases the attendant from an active call and completes the call-
extending process.
l Return-On-Busy [RTN-BUSY]: Camped-on calls are returned to the console on this button
if not answered within a specified interval.
l Return-On-Don’t-Answer [RTN-DA]: Extended calls not answered are returned to the
console on this button if not answered within a specified interval.
l Attendant Message Waiting [ATT MSG]: Used by the attendant to remotely control
Message LEDs on voice terminals.
l Alarm [ALARM]: The associated status LED flashes when a system trouble has been
detected; the LED can be changed from flashing to steadily lit by pressing the button. The
associated red status LED will be lighted when a bad barrier code or barrier code timeout is
detected. The red LED can be extinguished by pressing the associated button.
Two other attendant-only features are assigned to console feature buttons if required: Position Busy
[POS BUSY] and Night Service [NIGHT]. In a dual-attendant-console system, Position Busy
removes an attendant console from service. Only one of two consoles can be in the “Position Busy”
mode at a time. When Night Service is activated, attendant-seeking calls can ring a night bell, can
be directed to assigned voice terminals, or can be sent to a night service announcement.
Dual Console Operation
A System 25 can be equipped with up to two DTACs that operate simultaneously when both are in
service. If the system has two attendant consoles, one is called the first attendant console; the other
is called the second attendant console. The calls in the following list will be routed to the first
attendant console:
l Dial “0” calls
l DID calls to unassigned numbers (when administered to route to the attendant)
l Calls to Floating Personal Dial Codes (FPDCs) not signed in anywhere (if administered to
route to the attendant)
If the first attendant has activated the Position Busy feature or is busy on all System Access
buttons, these calls will be routed to the second console. If that console is also busy on all System
Access buttons, busy tone is provided to the calling party.
System users and DID callers can reach a particular attendant by dialing the Personal Dial Code
(PDC) assigned to the desired attendant.
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							Attendant Console, Direct Trunk
Position Busy
A POS BUSY button can be assigned to each console; this permits selection of one of two
modes of operation: (1) simultaneous operation or (2) only one Attendant Console active.
(Note that only one console is allowed to be inactive at any given time.) An associated POS
BUSY status LED is lighted when the console is inactive.Ringing is disabled on all trunk
terminations on the rightmost two columns of buttons of the inactive console. Ringing
disabled on an inactive console will be enabled on the active console for those trunks with
dual appearances (appearances on both consoles).All other features on all buttons,
including those on the associated Attendant Direct Extension Selector Console will continue
to function normally even though the console is inactive.
Considerations
Direct trunk operation means that trunks are terminated on individual buttons, called
Personal Line buttons, where outside calls are answered and originated. The console can
have several incoming calls ringing simultaneously.
Each console can also have an optional Attendant Direct Extension Selector Console to
enhance internal calling. The Selector Console is covered in the “Attendant Direct Extension
Selection” feature description.
For information on related Attendant Features (Table 2-E), refer to the individual feature
descriptions.
Interactions
The following features interact
Attendant Console, Switchedwith Direct Trunk Attendant Console.
Loop: A DTAC cannot operate in the same system with a
Switched Loop Attendant Console.
Bridging of System Access Buttons:A DTAC cannot serve as a principal station.
Callback Queuing: The attendant can queue calls that are extended using the normal
START-RELEASE button operation. However, calls originated using only the START button
(no other call put on hold) cannot be queued.
Call Waiting: Calls cannot wait at a DTAC.
Display: The DTAC does not support Display.
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							FEATURES AND SERVICES
Administration Requirements
System:
l Display attendant position number (first or second).
l Assign number of rings before unanswered calls return to the Attendant Position (1-
31; default = 5).
l Force DID calls to unassigned numbers to ring at the Attendant Position (yes or no;
default = yes).
l Force calls to FPDCs that are not signed in anywhere to ring at the Attendant
Position (yes or no; default = yes).
l Assign number of seconds before an unanswered Camped-On Call returns to the
Attendant Console (1-120 or 0 for no Attendant Camp-On; default = 30).
Attendant Console (Voice Terminal) Port:
l Assign voice terminal type (309).
l Assign buttons for Night Service and Position Busy, if required. Attendant Message
Waiting is defaulted to button 14, but can be assigned to any programmable button.
l The following buttons are predefined on the Attendant Console and are not
administrable: ALARM, RTN-DA, RTN-BUSY, START, CANCEL, and RELEASE.
l Trunk terminations; the following is required for each trunk terminated on the console
(administered as Personal Line appearances; DID trunks cannot be terminated on a
DTAC):
— Trunk Number
— Make this the Principal Station (owner) of the trunk (yes or no).
— Enable Ring (yes or no).
Hardware Requirements
Each console requires a port on a ZTN79 ATL Line circuit pack.
Figure 2-2 provides a connection diagram for the DTAC.
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							Attendant Console, Direct Trunk
SYSTEM 25
CABINET
PART OF
OCTOPUS CABLE
ZTN79
HYBRID
LINE CPPART OF SIP
C2SIPW1C1DIRECT TRUNK
ADAPT.B1ATTENDANT
CONSOLE T1
LEGEND:
B1 - TYPICAL-103A CONNECTING BLOCK*
C1 - MODULAR CORD (D8W-87) - FURNISHED WITH SET
C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P
T1 - 34-BUTTON VOICE TERMINAL: 7305H02D - PEC 3162-417,
7305H03B- PEC 3162-BIS, OR 7316H01A - PEC 3167-34B
W1 - 4-PAIR INSIDE WIRING CABLE*
* - FURNISHED BY INSTALLER
RANGE: WITHIN 2000 FEET OF SYSTEM CABINET (LOCAL POWER REQUIRED >1000 FEET)
Figure 2-2.
Direct Trunk Attendant Console Connections
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							FEATURES AND SERVICES
Attendant Console, Switched Loop
Description
In System 25, the Attendant Console is used to answer incoming trunk calls that are
specified to ring at an attendant position, to 
answer calls from inside users, to extend calls to
inside stations and outside numbers, to assist system users in placing outgoing calls, and to
set up conferences.The attendant can also manage and monitor some areas of system
operation. System 25 supports the Switched Loop Attendant Console (SLAC) or the Direct
Trunk Attendant Console (DTAC), which is covered in the preceding feature description of
this manual. Consoles of both types cannot be installed in the same system.
The SLAC (Figure 2-3) can be one of the Merlin System multiline voice terminals listed below,
administered with special buttons,features, and capabilities to serve as an attendant
console. In addition to the attendant features, most standard multiline terminal features are
also available. (Refer to Section 4, “Hardware Description,”for a complete identification of
all the external controls, indicators, and components of the SLAC voice terminals.)
l 7305H04C (34 programmable feature buttons; built-in speakerphone and display)
l 7317H01A (BIS-34D—34 programmable feature buttons each with I-use and status
LEDs; built-in speakerphone and display)
SWITCHED LOOP
ATTENDANT CONSOLEOPTIONAL SELECTORCONSOLE
Figure 2-3.Typical Switched Loop Attendant Console Position
Associated with the SLAC are message center-like capability and display support. The
message center feature provides for efficient handling of calls that should be sent to
message takers. These calls are directed to a message center console position through
administration of call type translations.Display service allows identifiers (names) to be
assigned to extension numbers and trunks.The system then displays the appropriate
information to the attendant when calls are processed at the console.
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							Attendant Console, Switched Loop
The Switched Loop Console derives its name from the ability of the system to hold incoming
attendant-bound calls in a queue and switch them on voice loops to an available console. Calls are
directed to a console in a pre-administered, prioritized sequence. The SLAC differs from the DTAC
in the following basic respects:
l It receives calls one at a time, regardless of the number of incoming calls to the system (at
the DTAC, many incoming calls can be ringing simultaneously).
l It displays pertinent information about incoming and outgoing calls.
l It can serve as an attendant console, a message center, or a combination of both.
l It has speakerphone and Hands-Free Answer on Intercom (HFAI) capabilities.
Fixed Buttons (Figure 2-4)
The SLAC has five fixed line appearance, or “LOOP,” buttons where all incoming calls are
answered. Each button has a red I-use LED and a green status LED. These buttons represent voice
links (loops) between the console and the switch. The loops also provide the paths for outgoing
calls.
In addition to the LOOP buttons and standard multiline terminal buttons (HOLD, TRANSFER, etc.),
the console is equipped with the following feature buttons that provide unique attendant functions.
On the deluxe SLAC, all of these buttons have both I-use and status LEDs; on the basic SLAC, only
the buttons specifically noted have LEDs.
l Start [START]: Initiates the call extending process by placing a caller on hold (on the
Source button) and providing internal dial tone to the attendant.
l Cancel [CANCEL]: Terminates the “Start” operation and reconnects the attendant to the
calling party (on the Source button).
l Release [RELEASE]: Releases the attendant from an active call and completes the call
extending process.
l Source [SOURCE]: Reconnects the attendant to the calling party after a call has been
initiated to the called party but before the two parties have been connected together. (I-use
and status LEDs on basic SLAC.)
l Destination [DEST]: Connects the attendant to the called party again after the attendant
has operated the Source button to speak to the calling party. (I-use and status LEDs on
basic SLAC.)
l Join [JOIN]: Joins together (in a 3-way connection) the attendant and the other parties in
an extended call.
l Forced Release [FORCED RELEASE]: Drops all active parties from a call.
l Last Number Dialed [LAST # DIALED]: Redials the last number dialed.
November 19952-25 
						

							Features and Services
l Position Busy [POS BUSY]: Temporarily removes the attendant position from service. (I-
use and status LEDs on basic SLAC.)
l Attendant Message Waiting [ATTENDANT MESSAGE WAITING]: Used by the attendant
to remotely control; Message LEDs on voice terminals. (Status LED only on basic SLAC.)
l Alarm [ALARM]: The associated green status LED flashes when a system trouble has
been detected; the LED can be changed from flashing to steadily lit by pressing the button.
(I-use and status LEDs on basic SLAC.) The associated red status LED will be lighted when
a bad barrier code or barrier code timeout is detected. The red LED can be extinguished by
pressing the associated button.
l Inspect [INSPECT]: Puts the display into a mode for inspecting the status or stored
information of certain buttons. (Status LED only on basic SLAC.)
l Scroll [SCROLL]: Causes display to present additional call information, when available.
l Local [LOCAL]: Allows display to be used for clock and calendar functions.
The buttons not assigned to normal voice terminal functions or to attendant functions are defaulted
to the Flex DSS feature. One of these programmable buttons can be assigned to Night Service, if
the feature is required, and any of the others to multiline voice terminal features.
Programmable Feature Buttons (Figure 2-4)
The features in the following list can be assigned to the programmable feature buttons. On the
deluxe SLAC, each of the programmable buttons is equipped with an I-use LED and a status LED.
On the basic SLAC the buttons do not have LEDs.
Account Code Entry
Exclusion
Agent Status for CMSFlex DSS
Auto AnswerLeave Word Calling
Auto IntercomManual Signaling
CallNext
Direct Facility AccessRepertory Dialing
Direct Station Selection (DSS)Station-to-Station Message Waiting
DirectoryTransfer to Data
Flex DSS and Repertory Dialing can be programmed with dialable numbers by the attendant. When
a call is placed using a Flex DSS button or a Repertory Dial button, one of the five switched loops is
automatically selected for routing the call to the switch.
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							Attendant Console, Switched Loop
Display (Figure 2-4)
The SLAC contains an alphanumeric call information display. This module is built into the
top of the console. It contains a 16-character 5x7 dot matrix liquid crystal display, timer
controls, and a thumbwheel Contrast adjustment.Timer functions are available only when
the attendant presses the Local button. The Time/Timer Exit button allows the user to select
ordinary clock/calendar display or a timer.In the Time mode, Set, Fwd, and Rev are used to
set the clock. In Timer mode, Start and Stop are used to time events.
The primary purpose of the console display is to provide the attendant with descriptive
information about incoming and outgoing calls. This information includes extension numbers
and associated names, trunk identifiers, reasons for call return and redirection, and number
of calls waiting in the queue for service.Refer to the “Display” feature description for a
detailed discussion of call information displays.
The console display also provides access to the system’s integrated directory and allows the
attendant to search for the extension numbers assigned to users. Refer to the “Directory”
description for information on this feature.
Switched Loop Operation
All calls that are intended for an attendant position are first routed by the system to a
common queue where they wait to be sent to a console. In a configuration having two
consoles, the same queue serves both consoles.When an attendant console becomes
available to receive a call, the system removes a call from the queue and directs it to an idle
loop on the console. Calls are selected from the queue on the basis of “first in/first out” and
in accordance with administered priorities. An available attendant console is one that is not
active on a call, has no calls ringing, has at least one LOOP button idle, is not in Position
Busy or Inspect mode, and is not in a split condition.
In a two-console arrangement, each console can be administered to receive all types of calls
or to receive only specific types. A call that can be received by either position goes to the
first available attendant; when both are available, the call goes to the attendant who has
been idle the longest time. If one console is in “Position Busy” mode, all calls (except
Attendant PDC, Attendant PDC via DID, and DGC calls) direct to the other console.
An incoming call from the queue to a console appears on one of the five LOOP buttons; the
attendant is alerted to to the call by audible ringing, a steadily lighted red lamp, and a flashing
green lamp. While the call is ringing and while the attendant is handling the call, the system
will direct no more calls to the console. After the attendant ends or releases the call or puts
it on hold, another call can come in on an idle button.
It should be emphasized that even when all LOOP buttons on a console are idle, only one
call can be directed from the queue to the console. If the attendant puts a call on hold, that
LOOP button is no longer available, but a new call can come in on another button that is idle.
Answering a Call on a LOOP Button
At an available SLAC, an incoming call will ring at an idle LOOP button automatically selected
by the system.The attendant has only to lift the handset to answer the call; pressing the
button is not necessary.
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							FEATURES AND SERVICES
Placing a Call on a LOOP Button
In general, originating a call at an idle SLAC involves going off-hook and then dialing the
desired number. If the console is not idle, the attendant can generally use one of these
procedures:
l Split the active call (that is, put it on temporary hold by pressing the Start button) and
place another call on the same button; this is the normal call-extending procedure.
l If the Automatic Hold feature is enabled, press another LOOP button to place a new
call; the first call goes on hold.
l If the console does not have Automatic Hold (that is, it has the default Automatic
Release), use the Hold button to put the active call on hold; then select a new loop to
place a new call.
Dual Console Operation
A System 25 can be equipped with up to two SLACs, which operate simultaneously when
both are in service. Both consoles can receive the same types of calls, or each can be
administered to receive only certain types. When one console is out of service (see Position
Busy below), most calls are directed to the other.Either or both consoles can function as a
message center.
Inside users can reach either attendant by dialing 0, or a particular one by dialing the
attendant’s PDC. DID callers can use the Attendant’s private DID number or the common
queue.
Position Busy
Operation of the Position Busy button by the attendant makes the console unavailable to
most incoming calls from the common queue and directs the calls to another answering
station. The only types of calls that are not diverted by Position Busy are Attendant DID,
DGC, and PDC calls. The placing of outgoing calls is not affected. When the Position Busy
condition is active, the green status lamp of the button lights steadily. Position Busy is
similar to the Send All Calls feature, which is not administrable on the SLAC.
The Position Busy feature is automatically assigned to a button position (see Figure 2-4)
when the console is administered. In a one-console configuration, however, the feature is
enabled only if a multiline voice terminal in the system is administered as a receiver of calls
from the common queue while the console is unavailable. If this is not done, the button
should be reassigned to another of the permissible features.
In a two-console configuration, an attendant in Position Busy mode will be covered by the
other attendant. Only one console can be in Position Busy mode at a time.
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							Attendant Console, Switched Loop
Call Types
The following types of attendant-seeking calls are sent to the common queue and then
directed to an idle LOOP button at a console:
l
l
l
l
l
l
l
l
lIncoming trunk calls that are administered to ring in the queue.
Dial Operator calls (placed from inside stations by dialing 0)
Following calls signed in at the console
Calls to Floating PDCs (FPDCs) that are not signed in at a specific station
Direct Inward Dialing (DID) calls to numbers that are not assigned to specific stations
Attendant DID calls
Calls to the attendant’s PDC
Coverage calls for which the common queue is a covering receiver
Returning calls.
An incoming trunk connected directly to a DGC group can also be assigned to the Attendant
Queue. Calls ringing simultaneously at the DGC group and at the console will be connected
to the facility that answers first.
The order in which calls (of the 32 call coverage groups) are serviced is established by
system administration.Each type of call is assigned a priority that determines its position in
the common queue with respect to other types.System administration also establishes
where the calls go. Obviously, in a one-attendant system, all calls automatically go to that
attendant. If a system has two attendants, however, administration can direct calls of each
type (with the exceptions noted below) to either position or to both positions. Returning calls
can be directed to either console or to the specific console that originated them,
Following and Attendant PDC calls can be assigned priorities but cannot be directed to a
specific attendant in a two-position system. Any trunk except types 901-902 and 1003-1008
(DID and Dial-in Tie Trunks) can be assigned 
a priority and be directed to a specific attendant
position or to both.
Calls accessed by dialing a code [Pickup at other extensions, Trunk-Answer-from-Any-
Station (TAAS) Night Service calls, and calls parked by other stations] are originated at a
LOOP button and brought to the console on that same button. These calls do not enter the
common queue.
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