Comdial Impact Dsu Instructions Manual

							Power Failure Transfer
An installer can connect an industry-standard telephone such as the model 2500 to a
special connection to serve as a power-fail telephone. If an AC power failure occurs, the
system automatically connects the power-fail telephone directly to an outside line. Users
can make normal origination and reception of calls on a power-fail telephone during an
AC power failure. The system will automatically disconnect the power-fail telephone
from the outside line as soon as AC power returns.
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.
See also,Line Features.
Privacy
Automatic Privacy
A programmer can make a line private or non-private through programming. In the
private mode, a station has exclusive use of the line during a call. No other station can
access that line unless the user of the private line adds another station through the use of
the add-on conference feature. In the non-private mode, another station with that line
appearance can gain access at the same time (sometimes known as common line pickup).
A line is specified as private or non-private through the line class of service
programming. Through station class of service programming, a programmer can make a
line non-private at a particular station.
See also,Conferencing.
Privacy—Designated Programmable Button
The programmer can arrange for stations to provide a privacy button. If a line is private,
a user can press the privacy button to change it into a non-private one. If the line is
non-private, pressing the button will have no effect. Station class of service programming
is used to program the programmable button function at the stations.
IMI66–107Digital Telephone System
Digital Telephone System Features A – 51 
						

							Privacy Release/Brokerage Service
See the previous paragraph titledPrivacy—Designated Programmable Button
Private Lines (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.
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.
See also,Automatic Dialing.
Programmable Buttons
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.
Digital Telephone SystemIMI66–107
A – 52  Digital Telephone System Features 
						

							Programming Password Protection
No one can enter a programming mode to reprogram the system without first entering a
password. The system provides two different entry levels for programming and allows
for a different password for each entry. The two programming entry levels are the
installer level and the administrator level. Programmers can enter the installer level, using
the installer password, to perform all programming functions including major changes
such as master clearing and line type programming. They can enter the administrator
level, using the administrator password, to perform most programming functions except
those major changes just mentioned. Programmers can use the VDT programming
method to change the passwords from their default values as needed to provide security
against unauthorized program entries. They can do this when the system is initially
installed and programmed, or at any later time as needed. Additionally, programmers can
construct a password that will prevent all COS programming entry from station 10.
Customized passwords can be alpha-numeric or numeric only (no spaces allowed) and
must contain six characters. To retain the ability to enter programming from station 10,
programmers must maintain the ISnnnSformat in the VDT password and enter only
numbers in the nnn entry; however, they must not enter a zero for the leading n. Once
customized, a password remains customized. Neither default nor master clear will erase
it. Programmers must use the new password to gain entry into the system for future
programming tasks. It is very important that someone keep a hard copy of the customized
password since it provides the only entry to system COS programming through either the
VDT or station 10. If no one can remember the customized password, the manufacturer
can provide emergency entry but there is a charge for this service. Otherwise, the installer
must disconnect all AC power and any battery back up equipment, wait at for an
extended period of time (up to several weeks) for the internal memory protection to
completely discharge, and reprogram the system using the default password to gain entry.
Pulse/Tone Switchable
The programmer can program the system on a per line basis using the line class of
service programming to allow the stations to switch from pulse to DTMF type dialing as
needed. Alternately, she or he can program the system to only allow tone dialing.
IMI66–107Digital Telephone System
Digital Telephone System Features A – 53 
						

							R
Redialing
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.
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.
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
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.
Saved Number Redial
This feature enables a button action to save the first 16 digits of the last number manually
dialed from the keypad. The saved number can be redialed at a later time. The saved
number is permanently available for later use until it is replaced with a new number.
When the caller identification feature is active, this saved number redial feature will save
the Caller ID number for redial.
Digital Telephone SystemIMI66–107
A – 54  Digital Telephone System Features 
						

							Response Messaging
This feature allows a user to reply in a non-verbal manner to a voice announce or
tone-signaled intercom call or to a subdued off-hook voice announce call if the intercom
caller is using an LCD speakerphone. A station user can press a programmable button in
response to an intercom call and send a message to be shown on the display of the calling
station. Response messages are pre-programmed by the attendant and later stored by
station users at programmable buttons on their individual stations as need dictates.
See also,Messaging.
Remote Programming And Administration
Both remote class of service programming and the transmission of SMDR data for
printing are available through serial data ports. The system supports X-on X-off terminal
control codes as well as a DTR signal for handshaking. The system data communications
operates per the popular XMODEM protocol. The database can be uploaded or
downloaded, error free, from or to a remote computer that is running software that
supports the XMODEM protocol. The two serial data ports allow VDT programming
(either local or remote) to be conducted through one port at the same time that the other
port is being used to send SMDR data for printing. VDT programming of the system is
menu driven.
See also,Class Of Service.
Ringer Volume Control
DigiTech andImpacttelephones have a ringer volume control that telephone users can
operate to adjust the loudness of the ringer at his or her station.
Ringing
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
IMI66–107Digital Telephone System
Digital Telephone System Features A – 55 
						

							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 determines
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.
Common Audible Ringer Interface
Connections are available at the common equipment that provides “dry-contact” relay
closures whenever an incoming line rings. These contact closures track the ringing
pattern and can be used to control an external signaling device.
Delayed Ringing
Ringing assignments are programmable. A station can be programmed to provide
delayed ringing on some lines while providing immediate ringing on other lines.
Delayed ringing is assigned to certain lines at each station through station class of service
programming. When a programmer assigns delayed ringing to a station for certain lines,
he or she can also assign the time length of the delay.
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.
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.
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
Digital Telephone SystemIMI66–107
A – 56  Digital Telephone System Features 
						

							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.
Night Transfer (Of Ringing)
Night transfer (of ringing) is an attendant-controlled feature that transfers the day ringing
program of all incoming calls to a particular station or stations for off-hour or special
purpose answering. The night transfer mode can only be activated from station 10 or 12.
The individual lines at each station that are to be transferred with this feature are selected
by station class of service programming.
Night Transfer (Of Ringing) Button
A night transfer of ringing, or night mode, button is available at attendant stations. The
night mode button gives attendants at stations 10 and 12 the ability to place the system
into the night transfer of ringing mode of operation by simply pressing one button instead
of entering the multiple keystroke sequence previously required. The night mode button
toggles the feature on and off with one keystroke and the light located above the
Intercom button on attendant telephones flutters to indicate when the night transfer or
ringing is active.
Personalized Ringing Tone
The system provides a group of distinctive tones for station ringing. A station user can
choose a tone from this group to provide a distinctive ring at his or her telephone. Often,
when several telephones are located close to each other, each user chooses a different
personal ring tone. The system provides six distinctive tones for users to choose from.
Subdued Ringing
When a station is busy on a call and another call comes to the same station, the system
will automatically subdue the ringing of the second call to a lower volume.
IMI66–107Digital Telephone System
Digital Telephone System Features A – 57 
						

							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.
See also,Line Features.
S
Saved Number Redial
This feature enables a button action to save the first 16 digits of the last number manually
dialed from the keypad. The saved number can be redialed at a later time. The saved
number is permanently available for later use until it is replaced with a new number.
When the caller identification feature is active, this saved number redial feature will save
the identified number for redial.
See also,Redial.
Scout 900MXDigital Wireless Telephone
Software release 16A supports the Scout 900MXDigital Wireless Telephone. The Scout
telephone is a 900 megahertz, spread-spectrum, wireless telephone. While the Scout
operates much like anImpacttelephone, you should note that a few operational
differences do exist. The “Call Announce Receive” and “All Call Receive” features
require that you install and enable a headset. The Scout does not support the “Autoredial”
or “voice response to SOHVA.” It is a good idea to program any Scout telephone station
port with “Delayed Ringing” to an ExecuMail port or attendant station in case the user is
out of range when he or she receives a call.
The Scout does have a range test that the installer or user can perform. Comdial highly
recommends that the installer perform a preliminary on-site range test to make sure the
Scout meets the customer’s needs (for more information on how to use the range-test
feature, see GCA70–308).
There is no limit to the number of Scout telephones that you can install on a system.
However, because of channel restrictions, only nine Scouts can be in use at one time
Digital Telephone SystemIMI66–107
A – 58  Digital Telephone System Features 
						

							within the same general area. If all nine channels are in use and a tenth Scout telephone
tries to place a call, the LCD will indicate “System Busy” and deny the call. If you do
install more than one  Scout wireless telephone, Comdial recommends that you leave at
least 10 feet between adjacent base units. The range of each Scout telephone is affected
by the layout and location of the base unit, so it is a good idea to install the base unit in
an unimpeded area and at desk-level or higher.
The Scout handset has three programmable buttons and one intercom button that give
you access to the telephone system’s features. Depending on the feature, either the
end-user or the system programmer can set these buttons. Scout does not require any
additional programming.
Self Diagnostics
Each station can execute a self test when so enabled by anyone who wishes to do so. This
test verifies processor, indicator, and tone functions.
Service Observing
Service observing allows a third party to enter an in-progress call in an unannounced
muted mode to monitor the conversation. The system does not send any warning tones
when the call entry is made. This feature is useful in allowing a supervisor to monitor the
performance of an employee during a phone conversation with a client. For a station to
provide the service observing feature, it must also have the executive override feature
enabled. When the programmer enables the service observing feature, the system
automatically enables the executive override feature as well. A programmer can enable or
block service observing (and executive override) at each desired station using station
class of service programming procedures.
Speakerphone Support
The digital telephone system’s speakerphone support enables a speakerphone’s ability to
originate handsfree operation for voice-signaled intercom calls in addition to all of the
other features that it normally provides.
Specialized Route Access
The digital telephone system provides a specialized route access feature that, when
enabled, allows the system to select a line group based on the digits the user has dialed.
By doing this, it matches calls with their best suited routes. The feature provides a
table-driven routing scheme where the numbers that users dial cause the system to chose
IMI66–107Digital Telephone System
Digital Telephone System Features A – 59 
						

							a line group after comparing the dialed number with entries that are contained in an
office code table, an area code table, and four special area code look-up tables.
The specialized route access operates in the following manner: When the caller presses
INTERCOM and dials 9 or presses a preprogrammed button, the system returns a special
dial tone. The caller then has 10 seconds in which to dial some digits; otherwise, the
telephone will return to its idle state. Once a caller begins to dial digits, he or she has a
certain period of time in which to dial each new digit. The system programmer selects
this time-out period through programming. After the caller has stopped dialing digits and
the end of the time-out period has occurred, the system analyzes the dialed digits and
routes the call by following the table-driven routing scheme depending upon how the
programmer has arranged the system.
The system routes calls based on comparison matches between the dialed number and the
entries that it finds in either an office code table, an area code table, or four special tables
for selected area codes. These tables contain 1000 entries from 000 to 999 and the
programmer can assign one line group to each entry; therefore, a routing match is always
possible.
The system matches dialed digits with table entries in the following manner:
·If the first digit that the caller dials is not a 1 or a 0, and if he or she dials less than
10 digits (such as : nnn-nnnn), the system evaluates the first three digits as an office
code, searches for the office code in the office code table, and finds a line group.
·If the first digit is either a 1 or a 0 (such as: n-nnn-nnnn), the system ignores the
first digit and evaluates the next three digits as an office code, searches for the
office code in the office code table, and finds a line group,
·If the first digit that the caller dials is neither a 1 nor a 0, and if he or she dials 10
digits or more (such as nnn-nnn-nnnn), the system evaluates the first three digits as
an area code and the following three digits as an office code.
·If the first digit that the caller dials is either a 1 or a 0 (such as n-nnn-nnn-nnnn),
the system ignores the first digit, evaluates the next three digits as an area code, and
evaluates the following three digits as an office code.
·After digit evaluation the system routes the call as per the following discussion: If
there is a special table that matches the dialed area code, the system searches that
table for the dialed office code and finds a line group. If there is not a special table
for that area code, the system just searches the area code table for it and finds a line
group.
Digital Telephone SystemIMI66–107
A – 60  Digital Telephone System Features