Comdial Dsu II Digital Telephone System Instructions Manual

							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
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 the JM008 expansion module or ATI-D
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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							Tone Or Voice Signaling
The system allows intercom calls to be tone signaled or voice signaled as the users
desire; however, the programmer uses system class of service programming procedures
to determine which signaling method the system will employed as the primary method.
Regardless of the programmer’s arrangement, telephone users can take action to use the
alternate method when they need it. See the paragraph titledIntercom Call Progress
Tonesfor a discussion of the intercom signaling tones.
Voice Announce Blocking
This feature allows station users to block voice announced intercom signaling by dialing
a code or pressing a programmable button programmed for that purpose. The
programmable button used to block voice signaling is enabled by station class of service
programming.
K
Key System/Hybrid Configuration
The system can operate as either a key system (KF designation) or as a hybrid system
(MF designation). In the past, this digital telephone system provided a hardware strap
that installers could move to distinguish between hybrid system and key system
operation; however, recent rulings by the FCC have eliminated the need for the hardware
strap. Therefore, whenever the programmer assigns lines to line groups, the system
automatically assumes the hybrid mode.
The KF and MF designations are equipment type categories as stipulated in FCC rules
and regulations, Part 68, and appear as part of the FCC Registration Number on the
equipment label. The installer must report the appropriate registration number to the
telephone company at the time of connection along with other FCC mandated
information. Operationally, the hybrid configuration allows dial access to (automatic
selection of) outgoing lines. The specific system feature that is enabled by the
multifunction (hybrid) configuration isLine Group (Including Dial Access). Since this is
a PBX type feature, it may incur a higher monthly tariff to the telephone company.
L
Last Number Redial
Each station is provided with a last number redial feature. This feature will save 32 digits
of the last outside number dialed. A newly dialed number will always automatically
replace a previously dialed number. Upon command, the system will choose a line and
redial the saved number. The system will first choose the prime line if assigned and idle.
If it is busy or unavailable, the system will choose any line assigned to idle line
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							preference. If they are unavailable, the system will chose the last line used at the station.
If it is busy, no further choice is made. No class of service is required.
See also,Redialing.
LCD Messaging
Standard and system-supplied custom display messages can be set by dialing a specific
code at any station. Such messages are to be received and displayed by any LCD
speakerphone that calls the station which set the message. When a message is set, the
intercom light at the setting station will flash to indicate that the feature is active.
See also,Messaging.
LCD Support
The system supports the use of digital telephones having a Liquid Crystal Display
(LCD). The display is capable of providing the station user with a visual presentation of:
call cost, call duration, number dialed, name of called station, name of active feature,
date and time, and programming prompts.
Interactive Button Support
The LCD speakerphone provides the user with three interactive buttons and expanded
LCD displays as a standard feature. The interactive buttons provide the user with quick,
easy access to system features and straightforward button programming without dialing
codes. The expanded displays prompt the telephone user on the operation and progress of
many of the telephone features and provides designations for the interactive buttons.
Since the interactive buttons provide many user features, their immediate functions vary
with the feature. The button functions change to match the feature that the user is
currently operating. At any given time, the current button designations show in the
display window.
Button Query
Station users who have LCD speakerphones can use their interactive buttons to access the
button query feature. With this feature, the station user can cause his or her LCD
speakerphone to show the function of each of its buttons on its display.
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							Line Features
Access Denied, Line Access Restriction
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.
Line Answer From Any Station (Night Mode)
When the attendant programs the system for nighttime operation using the night transfer
of ringing feature, the line answer from any station feature is made active. With this
feature, a user can dial an access code over the intercom line to allow him to answer any
ringing outside line. The line need not be ringing at the user’s station for this feature to
be used.
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.
Line Groups
Outside lines can be grouped together in up to four different groups. Users can program
an autodial button to select a line group or manually enter a dialing code for access to a
line. Grouping can reserve certain lines for certain clusters of stations as in a
tenant-service arrangement. The assignment of line groups frees station buttons normally
used for line selection thus making these buttons available for use with a feature such as
personal DSS/BLF with station-to-station messaging. Lines are placed in line groups
with the line class of service programming.
Line Preselection
A line can be manually selected before lifting the handset (for handsfree dialing) or after
the handset is lifted.
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							Line And Line Group Queuing
With the line queuing feature, the station user can take action that will place a station in a
queue where it awaits the availability of a line or line group. The station is automatically
signaled with five-ring bursts when the line is available to it for use. Each station can
queue one line at a time.
Originating Denied
The ability to originate calls on certain lines can be denied at individual stations through
system programming. The originating denied feature is programmed on a per station/per
line basis. Originating denied does not prevent a user from answering a ringing line,
retrieving a held call or receiving a transferred call. Call origination on a line is denied at
a particular station by the station class of service programming.
Prime Line Automatic
If the programmer uses station class of service programming to enable prime line
automatic at a station, the system will automatically select the designated outside line,
intercom line or line group when the user lifts the handset. A user can pre-empt prime
line pickup by preselecting another line before lifting the handset. If the prime line is
ringing, it is automatically answered when the user lifts the handset.
Ringing Line Preference
The system can be programmed on a per station basis to provide ringing line preference
on all lines programmed for ringing at the station. When ringing line preference is
enabled at a station, taking the handset off-hook automatically connects the station to any
outside line that is ringing at it. A line button will not have to be pressed. With ringing
line preference enabled, the telephones denote a ringing line with an orange colored
status light. If a station also has prime line assigned, the prime line will always be
answered first even though it may be the second line to ring. The ability of a particular
station to answer a ringing line without line selection is enabled by the station class of
service programming.
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