Comdial Impact Dsu Instructions Manual

							Appendix A:
Understanding The
System Features
A
Abandoned Hold Release
If an on-hold party hangs up at the CO/PBX end of a connection, causing an interruption
in the line current, the system will drop the line from the hold condition and return it to
service. The time interval between hang-up and line-drop is programmable in line class
of service programming with choices of either 50 msec or 350 msec. This feature is
usually dependent upon special arrangements that must be made at the CO end of the
connection. The line select indicator will turn off to indicate an idle line after a call on
that line has been abandoned.
See also,Hold.
Access Denied
The system programmer can deny access to particular lines at certain stations in the
system. A station user cannot select a denied line for use. This feature is programmable
on a per line/per station basis in station class of service programming.
See also,Line Features.
A
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							Account Codes (With Forced Positive Verification)
System users can employ account codes to identify calls by category or by any other
desired grouping so that the system can print reports. The account code entry can be
voluntary or the programmer can arrange the system so that the users are forced to enter
an account code before they can make an outgoing call. The system compares the
account code entered by a station user with a list of programmed account entries.
The programmer must program the system so that it verifies an entered account code as
valid. If he or she enables verification and the system cannot match an account code that
a user has dialed with the programmed account code entries, the system will sound an
error tone if account code
entry is voluntary, or it will prevent the user from further dialing until he or she enters a
matching account code if account code entry is forced.
A user must enter an account code either before dialing an outgoing call or after the
distant party on an incoming call has hung up. Additionally, users may enter an account
code before they select a line for an outgoing call if they wish. When they enter an
account code without a line selection, the code will apply to any line they subsequently
select at that station. On incoming and outgoing calls, the user who enters the account
code is associated with the call record except when the call is transferred. On transferred
calls, the transferee is associated with the call record.
As a feature to LCD speakerphone users, the programmer can arrange for a message to
appear in the telephone’s display to prompt the user to enter an account code during
incoming or before outgoing calls. He or she can also assign the length of time that the
display appears. The user must enter account code digits after the message appears. If the
programmer has set the system to verify code entry, it then makes a verification attempt.
If the system cannot verify the account code it causes the display to show an error
message. The user may then re-enter the account code at this point. If the verification
attempt is successful (or if the system does not require that the code be verified), the
display will return to its normal date and time message. If the account codes are forced
and the call is outgoing, then the line is dropped at the end of the display time if the user
has not entered a valid account code. The programmable range for the display time is 1 to
20 seconds. When the feature is not enabled, the system inhibits the display prompt.
When a station user activates the last number redial or automatic redial features for
outgoing calls, the system will automatically re-use the last account code the user entered
at that station unless he or she enters a new one before activating the redial feature.
In addition to turning on the account code feature, enabling its verification, and making it
either voluntary or forced, the programmer must set the account code length, specify the
number of digits that the system will verify, and make up the entire list of account codes
that the users will use. Account code length defines the number of digits that a user must
enter before the system will accept the code. The length can range from three to 16 digits
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							but cannot be lower than the verified account code length. The verified account code
length defines the number of digits that the system will verify before it accepts an
account code as valid. As well, verified account code length defines the number of valid
account codes that a programmer can store (as shown in the following table). A
programmer should be aware that when he or she changes the verified account code
length, the system automatically empties the list of valid account codes.
Account Code Length And Valid Account Codes
Digits VerifiedNumber of Valid Account Codes
3 1000
4 400
5, 6 266
7, 8 200
9, 10 160
11, 12 133
13, 14 114
15, 16 100
Even though a programmer has arranged a system to force users to enter account codes
before making calls, they can always dial certain programmer-defined emergency
numbers without an accompanying account code entry. The system allows a maximum of
10 programmable emergency numbers (earlier software releases allow three emergency
numbers). The minimum length of an emergency number is 1 digit and the maximum
length is 12 digits. Users may dial emergency numbers manually, through system speed
dial, personal speed dial, last-number redial, or automatic redial—with or without
account code entry.
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							Forced Account Code Entry For CENTREX Users
The programmer may set the TAP time so that CENTREX usersdo nothave to re-enter
an account code after pressing the TAP button. The programmer may also set the system
so that non-CENTREX usersdohave to enter an account code after pressing TAP.
·If the TAP time is set for 1 second or less (the hookflash time), the system will not
clear an account code after a TAP entry. This enables CENTREX users to do host
system transfers without entering an account code a second time.
·If the programmer sets the TAP time for 1.5 seconds or more (the recall time), the
system clears the account code after TAP entry. This forces non-CENTREX users
to re-enter an account code if they press TAP to recall a new dial tone.
Account Code Button
A programmer can use station class of service programming to assign an account code
button to any programmable button location at a station as part of the button mapping
procedure. With this account code button available, the user can press it and then dial an
account code without interrupting the call. Only the user of the Account Code button will
hear the DTMF tones when he or she dials the code. The distant on-line party will not
hear the DTMF tones, and the system will not place the line on hold. The user can hear
the distant on-line party while he or she is dialing an account code. If the telephone does
not provide an account code button, the user must dial an intercom code before he or she
dials the account code digits.
All-Call Paging
All-call paging allows all stations to receive announcements through the station speaker
at once. The system can also send all-call paging to the paging port where it applies it to
the input of an external paging amplifier. Origination of announcements must be via the
station handset. A programmer can arrange each station to receive and/or originate
all-call page. He or she enables the ability to receive and originate all-call paging at a
station through station class of service programming.
See also,Paging.
Analog Terminal Interface Support
The digital telephone system supports the operation of the Analog Terminal Interface
(ATI-D). The ATI-D is a multipurpose on-premise accessory with dual circuits that
provide an industry-standard telephone interface. This feature adapts most
industry-standard (IST) devices and voice processing systems to the digital telephone
system. The ATI-D accepts both tone and pulse (rotary) dialing from these devices. Each
ATI-D circuit will drive a load with a maximum ringer equivalence number (REN) of 2.0
thus allowing more than one IST connection at each ATI-D circuit input. The ATI-D
supports a wide variety of IST equipment such as model 500 and 2500 telephones,
cordless telephones, answering machines, and FAX machines. The ATI-D is housed in a
metal enclosure and is powered by the telephone system through the station port
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							connections. It contains a ringing generator to generate a ringing signal for the IST
devices.
Area Paging Interface
Any station user can dial a special code number in response to an all-call or zone page
and be connected to the paging party in a private conversation. All-call or zone paging is
provided to the stations through the station class of service programming.
See also,Paging.
Assist Button
This feature allows a station user to program a button to be used for sending a message to
an LCD speakerphone. Once programmed, the station user can press the ASSIST button
at anytime to sound a tone burst at the called station and present a preprogrammed
message in the station display. The user can send a message while on a call without
alerting the distant party. This feature is useful for requesting assistance while engaging
on a call. For example, a customer service representative could request assistance from a
supervisor while talking to a problem caller. The supervisor, upon receiving the tone and
noting the display message, could perform an executive override or service observing
action to join the call or monitor it.
See also,Messaging.
Automatic Callback
If a telephone user encounters a busy tone or a ring no-answer after calling an intercom
station, She or he can dial a special code number that will cause the system to
automatically ring both the user’s telephone and the one that he or she was calling. This
automatic callback occurs after the busy station becomes idle or after the user at the ring
no-answer station takes some action at it that indicates to the system that it is available to
be answered. No class of service programming is required to enable this feature.
See also,Intercom.
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							Automatic Dialing Of Stored Numbers
Automatic Dialing
The system supports up to 24 automatic dial (autodial) numbers per station. Autodial
buttons can store up to 16 digits plus an intercom or line selection. Stored digits include
0–9,Sand #. The system stores a pause at any point where the HOLD button is pressed,
and stores a hookflash at any point where the TAP button is pressed. Automatic dialing
provides a way to obtain one-button access to frequently used system features. This
feature does not require any class of service to enable it.
Programmable DSS/BLF
A station user can store one-button, direct station selection (DSS) at any memory button
location to create a DSS memory button. When this button is pressed, any active outside
call is automatically placed on hold and an intercom call is automatically made to that
previously stored station number. The visual indicators of the stations programmed at the
button locations form a busy lamp field (BLF). The BLF conveys station status to the
user. An autodial number can also be programmed as a secondary function at every
DSS/BLF memory location. No class of service is required.
Station Speed Dial
Each station provides 10 speed dial number locations at the keypad buttons. Station
speed dial numbers can be up to 16 digits in length and can include line or intercom
selection, numbers, #,S, pauses, and hookflash signals. A user can store a pause by
pressing the HOLD button and store a hookflash signal by pressing the TAP button.
System Speed Dial
The system provides 99 system-wide speed dial numbers. The system speed dial numbers
can be up to thirty-two digits in length, and can include numbers, #,S, pauses, and
hookflash signals. The attendant programs the system speed dial numbers at station 10 or
12 for use at every station in the system. No class of service programming is required.
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							Automatic Hold For Intercom
If a user selects the second intercom line while a call is active on the first intercom line,
this automatic hold feature lets the system automatically place the first intercom call on
hold. Use station class of service programming to enable this feature.
See also,Hold.
Automatic Hold—Transfer To Line
A programmer can use class of service programming to make this system feature
available to selected stations. When enabled, a user can press any line button and cause
an active line to automatically go on hold. This feature allows a user to move from line to
line without having to press the HOLD button to place any current calls on hold. Use
station class of service programming to enable this feature at the desired stations.
See also,Hold.
Automatic Pause Insertion
When the system stores a dialed number for later redial, it automatically stores a pause
whenever the user waits between digits for at least two seconds. The system inserts the
automatic pause in the stored number sequence at the point where the manual pause in
dialing occurred. The length of the automatic pause is programmable.
See also,Automatic Dialing of Stored NumbersandRedialing.
Automatic Redial (Of Busy Number Or Unanswered Call)
A user can automatically redial a busy number or unanswered call by activating this
feature. Once the user activates automatic redial, the station will select the line,
automatically dial the number, and wait for a response. It will do this once a minute for
approximately 10 minutes unless the user deactivates the feature by pressing that button
or another button or by lifting the handset. The feature cycle is timed and does not have
busy detection circuitry. Because of this, if the user is operating handsfree when the
called party answers, she or he must lift the handset to prevent the caller from being cut
off by the timing cycle. The automatic redial button is a designated programmable button
position and the user must program its location to make it active.
See also,Redialing.
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							Automatic Station Relocation
With this feature, the system will automatically recognize a particular station should that
station be relocated to a new station port. When someone places a telephone at a new port
location, it will continue to provide the same class of service parameters and respond to
the same extension numbers as it did at the original station port. A programmer must
enable this system feature using system class of service programming. As an added
feature when someone plugs an LCD speakerphone in a new station port, the system will
prompt the user on the display to verify the relocation of features.
Auxiliary Equipment Interface
An installer can use the auxiliary equipment interface to connect a telephone device or a
data device to an outside line ahead of the common equipment. The system can detect an
off-hook condition in a device that an installer has connected to the auxiliary equipment
interface, and turn on the status light for that line at telephones that have that line
appearance. It does this to indicate that the line is busy and not available for station use.
Auxiliary equipment interface connections provide connections to lines 2 and 4. A user
cannot interrupt an external device by pressing the line button unless the line has been
programmed to be non-private.
Auxiliary Ringer Interface
The auxiliary ringer interface provides “dry-contact” relay closures which track the
ringing pattern whenever the system sends ringing to a programmable destination.
Programmers can program relay control to be activated when the system sends ringing to
station port 17 or to the paging port.
When programmed for station port 17 ringing, an installer often uses an external device
to provide loud ringing. When programmed for paging port ringing, an installer often
installs an external paging amplifier to sound the rings. The system supplies ringing tones
to the paging port along with the relay closures. It can send the ringing tones to the input
of an external paging amplifier and the installer can arrange the wiring so that the relay
closures energize the paging amplifier while it is receiving the ringing tone. Use system
class of service programming to choose either the paging port or station port 17 for the
ringing port relay control. Also use system class of service to determine the type of
ringing sent to the paging port. Use station class of service programming to determine the
type of ringing that the system sends to station port 17.
Programmers can arrange for the system to send ringing tones for particular lines
through the PA port. They can choose between intercom tone and DTMF signaling tone
for the PA port ringing. They should choose the intercom tone if they desire a soft tone
and the DTMF tone if they desire a loud tone.
See also,Ringing.
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							B
Background Music
If the installer connects a customer-provided external music source to the system, the
music from that source will sound through the station loudspeakers after the users turn it
on at their stations. They can adjust the loudness of this background music with the
loudspeaker volume control. The system automatically turns the background music off
during calls. This feature requires no class of service programming.
See also,Music Features.
Basic Key Service (1A2) Emulation
The system provides all of the basic, 1A2-type, key service features. These features are:
selective line pickup, common line pickup, multiline pickup, and hold. No special class
of service programming is required.
Battery Back-Up
Battery Back-Up (Chassis, Cable, And Batteries)
The manufacturer offers battery back-up assemblies including chassis, cable, fuses, and
batteries as optional kits available through normal distribution channels. The assemblies
are designed so that installers can connect them directly to the uninterruptable power
source (UPS) interface located on the common equipment chassis. The system does not
require any action from the telephone user to make it operate on battery power nor does it
require any class of service programming action on the programmer’s part.
Battery Back-Up Interface
The common equipment cabinet provides an interface for an optional battery back-up kit
to give full uninterrupted system power in case of an AC power loss. The switching and
charge circuitry are in the common equipment, while the batteries, chassis, and cable are
packaged as a separate option. When plugged into an active AC power source the
common equipment will constantly charge the attached batteries. Built-in circuitry
automatically switches to battery power when AC power is lost. With batteries at full
charge, a fully loaded system will operate for a minimum of one hour without AC power.
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							Block Programming
A programmer can assign a particular line or station’s class of service to an entire block
of lines or stations with one programming action. This feature eliminates the need for
him or her to individually program stations and lines with the same class of service. A
programmer can perform a block programming class of service after he or she has
programmed a station class of service or line class of service for a particular station or
line.
See also,Class Of Service.
C
Call Announce With Handsfree Answerback
The internal loudspeaker at each station provides call-announce capability over the
intercom link. A user can make a handsfree response to a call-announce call without
lifting the handset.
The user can use the MUTE button to block all handsfree answerback response. This
arrangement will prevent a station user from monitoring another station site using the
monitoring ability of the voice announce feature. When a user presses the MUTE button,
all handsfree answerback is disabled, inhibiting any off-site monitoring. The MUTE light
turns on to indicate that this feature is active.
See also,Intercom.
Call Costing And Station Message Detail Accounting Reports
The system provides built-in, estimated costing of all outside calls. It also provides
station message detail accounting (SMDA) printout reports of all costed calls and
displays call costs on LCD speakerphones.
Call costing, in general, provides a means of establishing costs to be applied to outside
calls made from system telephones. Call costing computes charges for a call after it is
completed. It does not restrict dialing as toll restriction does. Call costs are based on a
two-tier time rate and includes a line surcharge cost. A programmer can program
allowances for call set-up and minimum call duration. The system provides several ways
of determining call costing, making it possible to apply reasonable rates for the entire
country.
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