Comdial Dsu II Digital Telephone System Instructions Manual

							4. A DISD line recalls to the DSU after a transfer recall time, and the DVA plays a
recall message to the caller. The DSU transfers the call once more to the same or
different stations. This action repeats three times.
5. After the last recall, the DVA plays the drop message and the DSU drops the line.
The installer can connect DVA devices to any available digital station ports. The
availability of station ports limits the number of DVA devices that can be connected to
the system. The system programmer arranges the DSU class of service programming to
customize the DVA operation for specific applications.
See also,Digital Voice Announcing
Direct Department Calling With Departmental Call Distribution
The system enhances direct department calling with departmental call distribution (DCD)
and provides a means by which outside lines can be assigned to one of four different
departments. Calls received on department lines and calls that are transferred to a
department from within the system search for an idle station in that department. The
system distributes department calls evenly throughout the department stations for
answering with individual stations having the ability to be taken out of service as
necessary. The system places calls received on department lines and calls that are
transferred to a department from within the system in a queue for servicing. It assigns
new calls, transferred calls, and held calls a time stamp so that they will be serviced in
the order of their arrival.
The system allows up to four departments and allows up to 16 stations and a minimum of
3 stations (plus one overflow station) in each one. The programmer can assign a station
to more than one department, if desired. Since the programmer can assign a station to
more than one department, she or he can add the attendant station to serve as the
overflow station for all departments if desired. The programmer can assign separate pilot
numbers (extension numbers) to each department that the users can use for making
intercom calls or doing call transfers to the department.
The direct department calling feature requires that the programmer assign lines and
stations to a department. It does not require that he or she assign department lines to
appear at buttons on department stations. If a site requires that a particular department
line must appear at a particular department station, the programmer can assign it;
however, the programmer must ensure that neither direct nor delayed ringing is enabled
for that line at that station.
An incoming call searches for the first station available to answer a call. If all stations in
a department are busy or ring with no answer (RNA call), the call will go to the overflow
station in that department (if one has been programmed). If there is no overflow station
programmed, the call continues to try the department stations until it is answered or
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							dropped by the caller. The caller continues to receive ringback tone until the call is
answered. The overflow station can service the call or transfer it back to the department
using the department pilot number. When the call is transferred back to the department
by an overflow station, it will not return to the overflow station until that station is idle
and has no ringing calls either new or transferred. Instead, the call will camp-on at the
department and wait for a station to become idle. The caller will receive music while on
hold if the system is so equipped. To provide reassurance to the caller during ringing it is
recommended that a music source be connected to the system. The call will remain in a
held state until it is answered or until the department transfer recall timeout period has
ended.
When the recall timeout period has ended, the call will return to the transferring station.
Intercom calls that are made to the department will test the department stations for busy
or a RNA. If all stations are busy, a busy tone is returned to the caller. Intercom calls will
not camp-on at the department but will go to the overflow station. Further, the system
camp-on feature cannot be used to camp-on to a department.
Subsequent calls to a department on a particular line always try the next station in the
department from whichever station serviced the last call on that line.
To understand this, assume a department with stations 15, 16, and 12 assigned as
department members 1, 2, and 3. Further assume lines 1, 2, and 3 are programmed to ring
in this department. To create a randomizing effect, the system tracks for each line which
department member (1, 2, or 3) serviced it last. When the next call arrives on line 1, for
instance, the system makes a search for the next idle department member after the last
one that serviced a call on line 1. Since there are several lines assigned to the department
and conversation times and wrap-up times vary, a natural random distribution of calls on
lines 1, 2, and 3 at stations 15, 16, and 12 will occur. Further, since the system is keeping
track on a per line basis of the servicing stations as department members instead of
station numbers, the programmer could rearrange the department list without having any
effect on call distribution. As the programmer adds more stations to a department, the
randomizing effect improves.
Since the RNA time of a station is a programmable feature, department stations can be
set to have a short RNA time to allow a call to search rapidly through a department for an
answer.
When an outside or transferred call is ringing at a department station, the station user can
press the pre-programmed Do Not Disturb (DND) button to place the station in an
off-duty condition. While off-duty, all outside and transferred calls skip to the next
department station. This off-duty condition remains set until the DND button is pressed
again to place the station back in service. When the overflow station is set to DND, all
incoming and transferred calls will return to the department queue.
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							A department station can also be taken out of service and placed in a wrap-up mode to
provide the user time for doing such things as follow-up paperwork. While a station is in
a wrap-up mode, all outside and transferred calls skip to the next department station. The
station user sets the wrap-up mode by pressing Hold DND and presses these buttons
again to clear the wrap-up mode.
It should be noted that the departments formed for use with this direct department calling
feature are different from those departments used in SMDA reporting. Assign department
transfer recall time (unanswered call transfer recall time feature) using the system class of
service programming. Assign lines for direct department calling using the line class of
service programming. Assign department stations, access codes to departments (flexible
numbering feature), and busy/RNA timeout (call forward—busy feature) using the
station class of service programming.
Departmental Calling Distribution (DCD) Report
The attendant station can request a Departmental Calling Distribution (DCD) report that
provides a compilation of department call activity. The statistics that are reported are
based on the department assignments that are active at the time of the report and are
extracted from the SMDR records collected by the system. For a report to be generated, a
department must exist. All calls that are included in the DCD report, must meet the
following conditions before they are reported as department calls:
·They must be incoming calls. Outgoing calls are not reported in the DCD report.
·The port number of the line which received the call must be one that is assigned to
a department.
·The port number of the station which answered the call must be assigned to a
department.
A DCD report consists of the following columns of information:
Station Number:The station name or extension number of the station being reported.
Idle Time:The amount of time that the station is on-hook and available to answer a call.
Dept. Calls: The amount of time spent on incoming calls that rang into the department
and calls that were transferred to the department.
Hold Time: The amount of time that department calls spent in an on-hold state at a
particular station.
Avg. Dept. Calls: The average time per call (including on-hold time) that a station spent
on a call.
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							Wrap-Up Time: The time that a station spent in a wrap-up mode doing such things as
follow-up paperwork. While a station is in a wrap-up mode, it does not receive
department calls. The station user sets a wrap-up mode by pressingHoldandDNDand
repeats the procedure to clear the wrap-up mode.
Missed Calls: The total number of calls that are not answered at a station and that are
cycled by the system to another station for answering.
Other Calls: This is a summation of the time spent on outgoing call activity, incoming
call activity on non-department lines, plus all intercom call activity.
On-Duty Time: The on-duty time includes a summation of idle time, department call
time, wrap-up time, and other call time.
Off-Duty Time:The time that a station spent in a do not disturb mode. While in a
do-not-disturb condition, a station is not available to receive calls. The station user sets a
do-not-disturb mode by pressing DND and repeats the procedure to clear the do not
disturb mode.
Unanswered Calls: Total number of calls that went unanswered at a department.
Calls Answered After 36 Seconds:Total number of calls that waited at least 36 seconds
(approximately six rings from the CO) before being answered.
Calls Handled By Overflow Station: Total number of calls that were answered and
transferred by the overflow station and then answered and serviced by another station.
Calls Terminated At Overflow Station: Total number of calls that were received by the
overflow station and were either answered but not transferred or were dropped by the
caller before being answered.
If you wish, you can enhance the DCD feature with digital voice announcing.
See also,Digital Voice Announcing.
Direct Inward Station Dialing (DISD)
The DISD feature allows an external party to call an intercom station directly without
assistance by the attendant. The DISD call must be received on a line which has been
specially programmed to allow this feature. Any line can be programmed to be a DISD
line for both the normal mode of operation and the night transfer (of ringing) mode of
operation.
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							The number of rings which occurs on a DISD line before it is answered is programmable.
By setting a large number of rings, time is allowed for a call to be serviced in a regular
manner by stations that have a line appearance for the DISD line. Setting the number of
rings to 0 disables the line for DISD use. If a line is to be dedicated for DISD use, it is a
good practice to set it for one ring. The amount of time allowed for an extension number
to be dialed is programmable and a DISD assist station can be programmed to answer
calls that are not completed during this dial time limit.
When a DISD line is called, it rings for a programmed number of rings. If the call is not
answered in a normal manner by a station with the line appearance during this time, the
system answers it and, if the programmer has chosen this feature, presents a DISD dial
tone to the caller. The system then waits for an extension number to be dialed from the
calling telephone. Only one DISD line is serviced at a time; therefore, an incoming call
could ring for more than the programmed number of rings if a DISD call is being
serviced when a second DISD call is received.
When a valid extension number is dialed, a confirmation tone is sounded, the system
attempts a transfer, and the called station rings if it is idle. If a called station does not
answer within the transfer recall timeout period, the call is returned to DISD dial tone. If
the called station has the call forward feature set, the forwarded station rings. If a called
station is busy, the call is placed on hold and camped-on at the busy station. The system
will send a call waiting tone to the busy party if the programmer has enabled the call
waiting tone feature. If the camp-on is not answered within the transfer recall timeout
period, a busy tone is given followed by DISD dial tone. The system will return the caller
to DISD dial tone two additional times and then drop the line (a total of three attempts
are made).
NOTE: The system routes calls made to busy and ring-no-answer stations to an idle
station in the hunt group. If no idle stations are available, the call is
camped-on at the dialed station.
If an invalid extension number is dialed, an error tone is sounded before the DISD dial
tone is returned. If a mistake in dialing is made, the caller can dial aSfor a new DISD
dial tone. The system will return the caller to DISD dial tone two additional times and
then drop the line. If extension number dialing is not completed within the programmed
dial time limit, the call is routed to the DISD assist station if one is programmed;
otherwise, the line is dropped. The programmer may select a DISD dial time limit of 0
seconds, allowing callers to obtain a transfer to the assist station without having to dial
any digits. If the assist station is busy (call will camp-on at the assist station) or if the
assist station does not answer before the transfer recall timeout period, the system will
return the caller to DISD dial tone. If extension number dialing is not completed within
the dial time limit this time, the line is dropped.
The installer should connect a music source to the system so the music can provide a
reassurance to the caller during a camp-on situation when the DISD feature is being used.
See also,Digital Voice Announcing
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							Direct Station Call Hold (Station Park)
This feature allows a station user to park a call at a specific station where it will be held
without ringing. A feature code plus a station extension number can be dialed over the
intercom line to park the call or a programmable button can be programmed to provide a
“directed hold” to a specific station. The parked call is picked up by directed station by
dialing a feature code. It can be picked up at any station through the use of the call
pickup feature. No class of service is required.
See also,Call Pick-Up—Directed and Call Park.
Direct Station Selection (DSS) Programmable
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.
See also,Automatic Dialing.
Distinctive Ringing
The ringing cadence of an incoming call is the same as the ringing cadence of the
TELCO, PBX, or CENTREX system. The ringing cadence of an intercom call presents
two tone bursts sounded every four seconds.
See also,Ringing.
Do Not Disturb
Any station can be set to a do-not-disturb mode (DND) using the designated DND
programmable button and associated indicator (indicator will light when DND is active).
While in the DND mode, the station will not ring on any incoming call nor will it accept
an intercom call. A party making an intercom call to a station set in the do-not-disturb
mode hears a fast busy tone. The feature cannot be overridden by the calling party unless
the override feature is enabled. The DND feature is used with the departmental calling
feature to provide a station wrap-up mode and a station off-duty mode.
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							Do Not Disturb Inhibit
The system can be programmed to inhibit any station from entering the DND mode.
System class of service programming is used to program this feature.
Do Not Disturb Override
Stations can be provided with DND override capability which will allow them to call a
station that is set in the DND mode. The Executive/Attendant Override feature must also
be active for DND override feature to function. Station class of service programming is
used to assign this feature.
Dual Intercom
This feature provides for two separate intercom lines at the same station. One intercom
line is fixed and is accessed with the Intercom button. The other intercom line is
programmable and is accessed by a programmable button selected for that purpose by
class of service programming. Calls are handled on the intercom lines in much the same
manner as outside calls are handled using the line buttons.
Special considerations are as follows:
·Distant party hang-up causes intercom link to drop.
·Intercom call to station already busy on intercom rings in subdued fashion and
flashes indicator associated with other intercom button.
·With both intercom lines busy, a third intercom call results in a subdued off-hook
voice announce (if enabled) at busy station.
·Pressing a DSS button while on an active intercom call will drop the distant party
unless the automatic hold feature is enabled for the intercom line through class of
service programming.
The hold button can be used, however, to place an intercom call on hold before
selecting the other intercom line for use.
·Any action taken on the intercom by a station being observed via the service
observing feature will cause the observing station to return to an idle state.
The station class of service button mapping procedure assigns a programmable button to
serve as the second intercom button.
See also,Intercom.
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							Dynamic Line Buttons
Through class of service programming, the programmer can arrange certain idle line
buttons to serve as dynamic line buttons. This feature allows the system to temporarily
assign a line to a station that normally does not have the line assigned to it, and have that
line appear on a dynamic line button. While the call is appearing on the dynamic line
button (LED on), any normal call handling operations can be performed. Station class of
service programming allows certain buttons to be programmed as dynamic line buttons
E
End-To-End Signaling
End-To-End Signaling On Intercom
After an intercom call has been established with an analog telephony device that is
connected to the system through the JM008 expansion module or ATI-D analog terminal
interface device, the system can continue to send dialing signals (DTMF tones) through
the intercom path. This feature can be performed from every station in the system, and is
used by peripherals such as voice mail equipment.
End-To-End Signaling On Lines
After an outside call has been established, the system can continue to send dialing signals
(DTMF tones) through the telco network and have them received at the distant end for
inward call completion (bank by telephone, etc.). This conventional, off-hook dialing
feature can be performed from every station in the system.
Exclusive Hold
Exclusive hold prohibits a held call from being retrieved by any other station. The
exclusive hold condition also links a call on hold to the timed hold recall timeout feature.
After timeout, the system causes audible and visual signaling to occur and reverts the
exclusive hold condition to a normal line hold condition.
See also,Hold.
Exclusive Hold System-Wide Enable/Disable
This feature allows programmers to use system class of service programming to enable or
disable exclusive hold capability on a system-wide basis.
See also,Hold.
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							Executive/Attendant Override
This feature allows the user of a station, upon encountering a busy signal at another
station, to dial a code that will override the busy signal of a call, sound a warning tone,
and allow access to the existing conversation. This feature is enabled through station
class of service programming.
External Paging Interface
A dedicated paging port or a spare line port can be interfaced with an external paging
amplifier. The paging amplifier can then be dial-accessed by stations in the system.
DTMF tones can be dialed through the line port to provide zone selection if provided by
the external paging amplifier. The dedicated paging port does not support any
“talk-back” capability even if such a feature is provided by the external equipment. The
line class of service programming arranges a line port for external paging interface. The
system precedes an announcement through the paging port with an alerting tone.
Programmers can choose between an intercom tone or a DTMF signaling tone for this
paging alert tone. They should choose the intercom tone for a soft alert and choose the
DTMF tone for a loud alert.
See also,Paging.
F
Feature Inhibit
A large array of individual features can be disabled system-wide to provide a basic
telephone system. A basic telephone system is useful for installation environments where
a large proportion of the stations are accessible to unauthorized users thus subject to
tampering or for environments where station users must be limited as to the variety of
features allowed to them. Features are disabled by system class of service. Once disabled,
they can enabled by turning on all features at once using the system default
programming.
Flexible Ringing Assignments
Ringing assignments are programmable on a per station/per line basis. Ringing can be
controlled for every line that has an appearance at each station. Delayed ringing is
assigned to certain lines at each station through station class of service programming.
See also,Ringing.
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							Flexible Ringing Assignments Of PA Port
The PA port can be programmed for flexible ringing assignments and zone pages. Any
desired lines can be programmed for direct ring, delay ring, or night transfer (of ringing)
at this port. Paging can be to programmed zone or to all-call. A speaker can be connected
to the PA port to sound the ringing that is generated by the system and sent to this port
and paging announcements when they are sent to the programmed zone. Using such an
arrangement, it is possible for a user to determine that certain lines are ringing, such as in
a night transfer (of ringing) mode, and go to the nearest telephone and answer the call.
The most common use for this arrangement is as a night bell eliminating the need for
external equipment as required with the common ringer and auxiliary ringer interface.
The speaker cannot be used for voice response as the path is one-way only. Use system
class of service programming to assign ringing and paging to a PA port.
See also,Ringing.
Flexible Station And Line Class Of Service Control
The extension number of a station and all other programmable attributes that are initially
assigned to a particular station port and the line, along with all programmable line
attributes that are initially connected to a particular line port can be re-assigned to a
different port through programming action. This feature allows adds, moves, and changes
without re-locating the station and line wiring. A programmer can use line and station
class of service programming are used to reassign stations and lines.
See also,Class Of Service.
Flexible Station Numbering Plan
The system supports a flexible station numbering plan for individual stations. Each
station can be programmed to respond to the dialing of any available number between 10
and 7999. This feature may be used to match the calling number of a station located in a
pre-numbered area to that area number. A combination of two, three, or four digit
extension numbers can be assigned as long as they do not conflict. For example: If 21 is
assigned as an extension number, there can not be any other extension number assigned
that begins with a 21. The system class of service programming is used to assign
extension numbers to individual station ports.
See also,Square/Non-Square Configuration.
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