Comdial Dsu II Digital Telephone System Instructions Manual

							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,Impact, and Impression telephones 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
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							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
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							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.
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							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
The DSU II 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
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							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
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							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.
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							The following information illustrates the digit evaluation scheme.
Digit Evaluation
Quantity Of Digits
DialedActual Dialed DigitsDigits Evaluated By
System To Find Line
Group
2 67 067
3 118 118
4 5123 512
7 9782200 978
8 19782200 978
10 8049782200 804, 978
11 18049782200 804, 978
The example below shows how calls to area code 202 are routed using line group 2, calls
to office code 202 are routed using line group 1, calls to office code 973 in area code 716
are routed using line group 4, and all other calls are routed using line group 1.
Routing Calls Through Different Line Groups
Special Tables For Selected Area Codes
(Each table is for office code entries in a specific area code.)
Entries
000–999Office
Code TableArea Code
TableArea Code 1
(716)Area Code 2
()Area Code 3
()Area Code 4
()
000 1 1
001 1 1
002 1 1
202 1 2 1
212 1 1 1
973 1 4
997 1 1
998 1 1
999 1 1
The programmer can arrange for the system to insert up to eight digits (including * and #
as well as 0–9) ahead of a dialed number for a selected line group. Further, the
programmer can enter a pause of system-determined length as a character in the digit
string.
To help understand this digit insertion, review this typical arrangement for transparent
CENTREX operation (This example assumes that the CENTREX extensions do not
conflict with the office codes.): With the digital telephone system installed behind a
CENTREX system, callers can make outgoing calls without having to dial 9. Assume
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							that the CENTREX extensions are 3300–3399. Take programming action to assign line
group 2 to entries 330–339 in the office code table. This means that calls on CENTREX
extensions will use line group 2 and all other calls will default to use line group 1.
Program the 9 digit as the insertion digit for line group 1. With this set up, when a caller
dials a number other than a CENTREX extension, the system automatically inserts a 9
ahead of the dialed digits and routes the call over line group 1.
If no lines are free in a selected line group, the system will route the call to an overflow
line group if the programmer has assigned one; otherwise, the system will return busy
tone to the caller.
NOTE: If the programmer has arranged for the system to insert digits on a particular
line group, he or she should consider arranging for the system to insert digits in the
overflow  line group as well. This consideration is necessary only if it is important for
the call to route through the same common carrier as was the original line group.
While line group dialing codes 81, 82, and 83 do not provide access to the SRA feature,
they could provide a means of bypassing SRA by allowing users access to line groups
outside of the SRA process. To insure that the system routes all calls through SRA,
programmers should use the feature inhibit programming procedure to inhibit dialing
codes 81, 82, and 83.
Using Specialized Route Access For Simplified Toll Restriction
In anticipation of the implementation of the revised North American dialing plan, the
SRA feature provides the system with the ability to deny calling to designated area or
office codes. The programmer merely assigns a line group that contains no assigned lines
to the designated office or area code. This prevents the system from routing calls for
dialed numbers containing those particular area or office codes since there is no line
available. This action will work only for manually dialed numbers because automatically
dialed numbers, with no line preselect, employ the last used line and therefore cannot be
restricted.
Square/Non-Square Configuration
A programmer can arrange for a system to be square or non-square as desired. In a square
system, the line 1 buttons of all telephone stations select line 1, the line 2 buttons select
line 2, etc. In a non-square system, each line select button at every station may be
assigned individually to select any line. A programmer can perform unique button
mapping for line appearance on each station using the station class of service
programming.
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							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.
Tenant Service
A system programmer can arrange for one telephone system to be used for multiple
tenants at a site location by employing flexible line appearance at each station. The
programmer can perform button mapping for line appearance on each station in the
system using the station class of service programming.
Station Monitoring With DSS Call Pickup
The busy lamp field (BLF) of a station can provide visual indication of the idle, busy,
and ringing status of monitored stations. This monitoring station can also provide audible
indication of any direct and delayed ringing that occurs at the monitored station if the
programmer has enabled the visual ring indication feature. A user at the monitoring
station can make a one-button pickup of a ringing call at a monitored station by pressing
the direct station selection (DSS) button associated with the ringing station.
The programmer can enable or disable the flashing BLF lights associated with visual ring
indication on a system-wide basis. When the programmer enables the flashing lights, he
or she can then enable the audible indication of ringing on a station-by-station basis.
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.
See also,Automatic Dialing.
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							Station-To-Station Messaging
If a station has a DSS/BLF appearance at another station, a callback message indication
can be left at that station with the DSS/BLF appearance. The user can dial a special code
to turn on the BLF light at the called station that is assigned to the calling station. This
light indicates that a callback is requested. The light is automatically turned off if a
successful callback is made.
If a station number is not programmed for a DSS/BLF appearance at another station,
attempting to place a call back message will cause the central message desk station to
ring. If there is no central message desk assigned, no action will occur.
See also,Messaging.
Subdued Off-Hook Voice Announce
With the subdued off-hook voice announce (SOHVA) feature, a user can make a voice
announcement from one station to another station that is off-hook and busy on a call. A
station being operated in a handsfree mode cannot receive a SOHVA. With SOHVA, the
caller delivers the call and the user receiving the call responds to it in a secure manner
that prevents the distant party from hearing either the announcement or the response.
The system precedes the announcement with a tone alert that it delivers to the handset
receiver of the called telephone. It also supplies a tone to the announcing caller to alert
them that they are making a SOHVA call. A programmer can set the quantity of tone
bursts from one to six. A user can respond to the SOHVA announcement either verbally
or non-verbally. He or she either effects a verbal response by pressing and holding the
MUTE button and speaking into the handset or effects a non-verbal response by pressing
a pre-programmed button to send a message to be shown on the display of the
announcing station (if it is an LCD speakerphone). The system automatically disconnects
the announcing station after it delivers the response message to it (and displayed if an
LCD speakerphone). Stations that have the voice announce blocking feature turned on
cannot receive a SOHVA. A programmer can use station class of service programming to
disable the SOHVA feature at a station port if desired.
Subdued Off-Hook Voice Announce Originate Button
This feature allows a telephone user to program a button at his or her station that she or
he must press before delivering a SOHVA call. This SOHVA enabled button allows a
caller, after hearing a busy signal, to decide whether to interrupt the called party in a
SOHVA manner. If the caller decides that the called should be interrupted, the caller can
press the button and complete the SOHVA call. This button, along with SOHVA groups,
allows system users greater control of the callers that are allowed to make SOHVA calls
and of the situations in which they are allowed to make them.
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