Comdial Impact Dsu Instructions Manual

							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 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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							Full Button Programmability Of Features
A programmer, or in many cases the users themselves, can make most system features
available at programmable buttons merely by storing the specific access codes necessary
for dialing the features. Storable features include those that can utilize lamp (on/off)
supervision (e.g., call park orbits). The system will store all feature access codes except
for those requiring Transfer/Conference button action. It will store continuous strings of
digits (including presses of the intercom button) up to the maximum amount of storable
digits (16) allowed in an autodial entry.
See also,Programmable Buttons.
H
Handsfree Answer Inhibit
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 thus inhibiting any off-site monitoring. The MUTE
light turns on steady to indicate that this feature is active.
See also,Mute.
Headset Capability
Certain proprietary LCD speakerphones include an auxiliary jack that provides an
interface for a headset. To use a headset, the user merely plugs it into the telephone
auxiliary jack and presses the appropriate button on his or her telephone to enable the
headset mode. (In the case of Impression LCD speakerphones, users disconnect the
handset and connect a headset in its place.) The telephone transfers its speakerphone
function to the headset. To enhance the headset usefulness, the system delivers subdued
off-hook voice announce (SOHVA) messages to the headset when it is in use.
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							Hold
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.
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.
Automatic Hold—Transfer To Intercom (Answer Hold)
If a user selects the intercom line while an outside line call is active, this system feature
causes the system to automatically place the outside call on hold. This feature does not
require class of service programming to enable it.
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.
Call Park
The call park feature is similar to a manual hold condition. A user can park a call a
particular station and retrieve it at any station in the system by dialing the appropriate
access code.
NOTE: The retrieving station must have access to the line on which the call appears.
Calls are parked and retrieved within the system through the use of dialing codes. The
system provides nine parking circuits (orbits). Call park, when used with the paging
features, allows a system attendant to direct calls to roving personnel. A call that is left in
a parking orbit for preprogrammed length of time automatically returns to a timed hold
recall condition at the station where the user originally parked the call.
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							Exclusive Hold
Exclusive hold prohibits a held call from being retrieved by any other station. The
exclusive hold condition also links the held call to the timed hold recall timeout feature.
After timeout, the system causes audible and visual signaling to occur reverts the
exclusive hold condition to a normal line hold condition.
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.
Manual Hold
A button activated feature at each station will place an outside line on hold. When a user
presses the HOLD button while on a call, the system places the call on hold, provides a
distinctive flash rate of the line button indicator, and allows the user to access other
station features. A user at the holding station or at any other station that has access to the
line can retrieve the held call.
Timed Hold Recall
After a call has been on hold for a programmed length of time the system will re-call the
station that placed the call on hold. The programmer sets the timed hold recall time
period using system class of service programming.
I
I Hold And I Use Indications
The light associated with a line button provides a visual indication of the status of that
line. When a station user has a line in-use or on-hold at a station, the light indication
provided at that station is of a different color than the indication provided at the other
stations in the system. No class of service programming is required.
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							Idle Line Preference
When a station is programmed for idle line preference, it will automatically be connected
to the first assigned idle line. The system can be programmed on a per station basis to
enable idle line preference. When idle line preference is enabled, taking the handset
off-hook will automatically connect the station to any assigned line that is idle and has
been arranged for this feature. The line button will not have to be pressed. If this feature
is used in conjunction with prime line automatic, the user will be given prime line first
when going off-hook. An idle line will be given if the prime line is in use. The station
class of service programming enables this feature on a per station/per line basis.
See also,Line Features.
Impression Telephone Support
The digital telephone system supports the use of Comdial Impression digital telephones.
This new proprietary digital telephone style is available in the following models:
2022S–FB and –PT LCD Speakerphone
2122S–FB and –PT Non-LCD Speakerphone
2122X–FB and –PT Non-LCD Monitor Telephone
2101N–FB and –PT Single Line Proprietary Telephone
DU32X–FB and –PT 32-Button DSS/BLF Console
Both the Snnnn and Innnn software available for the digital telephone system support the
Impression telephones. Impression telephones are completely compatible with all of the
features provided by the digital telephone system and require no unique programming.
Industry-Standard Telephone Support
The digital telephone system supports the use of an industry-standard telephone (IST)
such as a model 2500. It does this through an analog terminal interface.
An IST provides a full range of system features to the system telephone users and
operates in one of two different modes as determined by the system installer. He or she
may program the telephone to provide an intercom dial tone when a user lifts the handset.
This arrangement is known as “prime intercom.” Alternately, the installer may program
the telephone to provide outside line dial tone instead. This arrangement is known as
“prime line automatic” or “idle line preference.” With prime intercom, users can dial the
system feature codes as soon as they lift the IST’s handset. With prime line automatic or
idle line preference, users must obtain intercom dial tone before dialing the various
feature codes. They do this by pressing and releasing the hookswitch after they hear the
outside line dial tone. This action either drops the outside line (if no digits are dialed after
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							the handset is lifted) or places the outside line on hold (if digits are dialed) and causes
intercom dial tone to return to the IST.
Pressing and releasing the hookswitch is commonly known as flashing the hookswitch or
performing a FLASH. Some ISTs are equipped with a TAP button, Users can press the
TAP button to cause the same effect as performing a FLASH.
The system provides a feature that allows IST users to FLASH an outside line for some
purpose (for example, to access a host system feature). Since flashing the IST hookswitch
while on an outside line accesses the intercom dial tone, users must dial a code to
actually generate the FLASH signal over the outside line.
Intercom Features
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.
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 thus inhibiting any off-site monitoring. The MUTE
light turns on steady to indicate that this feature is active.
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.
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							·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.
Intercom Call Progress Tones
Intercom call progress is marked by special tones. A steady tone is provided for dial tone.
Ring-back tone is one second on and three seconds off. For tone-signaled intercom calls,
a two-tone burst is sounded every four seconds at a called station and returned to the
caller as ring-back. For a voice signaled intercom call, a single tone burst is sounded at a
called station. When a called station is busy, a busy signal of one-half second on and
one-half second off is received at the calling station. The system supplies a fast busy tone
when the called station is in the do not disturb mode. Analog terminal interface ports are
only supplied with the regular busy tone since fast busy tones could interfere with the
operation of some accessories that can be connected to this port.
For more information, see section 1.7.2,System Ringing Patterns.
Intercom Hunt Group
Station ports can be assigned to intercom hunt groups. When a station that is assigned to
a hunt group is busy or is a ring-no-answer (RNA), a call to it will ring at the next idle
station in the group. A hunt group can be terminal or circular. A call will route down a
terminal group from the called station until it finds an idle station or reaches the end of
the group. A call will search around a circular group until it encounters an idle station or
until all stations in the circular group are searched. The ringing time at anyone station is
programmable. Hunt groups are created through station class of service programming.
Intercom Line Timeout
Should the intercom line be selected with no dialing or other action taking place, the
intercom will timeout after 15 seconds, and return to an idle state.
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