Comdial Dxp Plus Instructions Manual

							Maximum Call Duration
This feature automatically cuts off calls on certain lines after a preprogrammed time. The system will not
cut off calls made to an emergency number. The system sounds a warning tone at the busy station 10
seconds before it disconnects the call. The warning tone consists of one 800 ms burst followed by eight
100 ms bursts.
Meet—Me Answer Page
Any station user can dial a code in response to an all-call or zone page and be connected to the paging
party in a private conversation.
Memory Retention Without Batteries
The database programming is electronically protected during AC power failures by an internal electronic
component sometimes known as a “supercap”. The stored data will remain in memory for a minimum of
30 hours provided that the system has been powered continuously for approximately 30 minutes prior to
the power failure or disconnection. The system clock will continue to run for at least 30 minutes after an
AC power failure or disconnection.
Message Deposit
This messaging feature allows station users to call an LCD speakerphone and arrange for a message to be
left on its display.  The message is for the called party to read if he or she is unable to answer the caller.
Message Waiting
A special feature access code allows a station user to control the message waiting (MW) light at other
stations in the system. When the message waiting light is turned on at a station, the user can
automatically call the station that turned it on. Stations that include an LCD display show the source of
the message.
The programmer can program one station as the central message desk and arrange it for exclusive
message waiting control. The central message desk user can control message waiting lights and deliver
messages to and from all other stations in the system.  The programmer can also provide a programmable
button for placing and retrieving message waiting calls. Single line telephones only utilize central
message desk signaling. A station can have as many 8 message waiting lights stacked at one time.
Mnemonic Programming
Refer to the discussion titledProgrammable Button Flexibility.
Modem Support
The system supports the operation of the DXMDM serial data modem. The DXMDM is a
general-purpose, 300, 1200, and 2400 automatic baud detect, serial data modem that receives its operating
power and configuration programming from the DXP Plus system. The CPU board provides a dedicated
serial data port for DXMDM modem use. If your installer connects the modem to a serial data port that is
supplied by a communications card, he or she  will need to program the system for modem operation on
this port. Regardless of where the modem is connected, the system arranges for that port to automatically
match the baud rate and serial data parameters of the modem.
The system also supports the operation of a customer-supplied modem connected to a serial data port that
is supplied by a communications card.. This customer-supplied modem must be self-powered and must
provide its own terminal ready and auto answer capability.
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							Modify Digits Table
Refer to the discussion titledAutomatic Route Selection.
Multiple Attendant Positions
The system supports the operation of an attendant position at more than one station port.
Also refer to the discussion titledAttendant Position.
Multipurpose Line Board
The multipurpose line board provides system interface for ground start lines, loop start lines, and E & M
Tie lines; these are typically the three line types that the central office (CO) makes available for
connection. The multipurpose line board is programmable for each line type. You can have a maximum
of two Tie lines on each multipurpose line board.
Music Interface
The services circuit board provides a modular jack where the installer can connect customer-provided
music sources.  Two different sources can be used so that the music supplied to parties while they are on
hold is different than that supplied internally for background music. Also refer to the discussions titled
Background MusicandMusic On Hold.
Music On Hold (MOH)
When an installer connects a customer-supplied music source to the system and the programmer enables
the feature, music is provided to outside lines and intercom calls while they are on hold. Music on hold
can be turned on or off system-wide by attendant action. Also see discussions titledMusic Interfaceand
Background Music. You can program each line for either music on hold source.
Mute
Each multiline telephone has a MUTE button that, when pressed by the user, will mute the handset
transmitter (or internal microphone on speakerphones) to prevent the user’s voice from being heard by the
distant party. The mute light flashes to indicate a muted condition. Users can respond to a SOHVA by
pressing the MUTE button and speaking to the SOHVA sender and releasing the button when they have
finished their response. The button provides push-on/push-off operation on speakerphones. Also refer to
the discussion titledHandsfree Answer InhibitandSubdued Off-Hook Voice Announce.
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							N
Names (Station And Lines)
The programmer can name every station and line connected to the system for identification and
programming purposes. On an LCD speakerphone, the name of called and calling stations appear in the
display. When a user selects a line for use or when it is ringing on a call, the line name appears in the
LCD speakerphone display.
Night Service Automatic Switching
The programmer can arrange the system to automatically enter and exit the night transfer (of ringing)
mode of operation on a timed basis.
Also refer to the discussion titledNight Transfer (Of Ringing).
Night Ringing
The attendant can manually place the system in the night ringing mode by dialing a code or pressing a
preprogrammed button. This mode overrides the direct, day 1, and day 2 automatic ringing modes.
While this feature is active, calls on lines assigned to delayed and night ringing both ring at the various
stations. No other ringing occurs unless the programmer has arranged for a loud ringing bell or other
external ringing device to sound when calls appear on those assigned lines during the night ringing mode.
These calls may be answered at any telephone in the system if the user dials the proper code.
When the attendant station includes a preprogrammed night transfer (of ringing) button, its associated
light conveys the following system ringing status: day 1 ringing = steady on, day 2 ringing = wink with
off time, night ringing = continuous wink, and manual night transfer (of ringing) = flutter.
Also refer to the discussions titledAuxiliary Ringer Interface, Common Audible Ringer Interface,
External Paging Interface, Flexible Ringing Assignments, andLine Answer From Any Station.
O
Off-Premise Extension (OPX)
Installers can locate any industry-standard telephone away from the main premises served by the system.
To enable this feature, they must use a proprietary interface device between the telephone and the DXP
Plussystem and make the necessary programming entries.
On-Hook Dialing
Multiline speakerphones and monitor telephones provide manual and/or automatic dialing while it’s
handset is on-hook. An internal loudspeaker monitors call progress for completion (the user must take the
handset off-hook to provide the voice link on non-speakerphone monitor stations).
Operator Station
The system programmer designate the station that you want to ring when system users dial the operator.
Usually this station is an attendant position station; however, the operator station can be any station in the
system. In other words, the operator station does not have to be an attendant position station if you do not
want it to be one. Plus, the programmer can change the code that users dial to call the operator from a
default of 0 to the dialing code of your choice.
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							Originating Denied
The programmer can deny users the ability to originate calls on certain lines or intercom numbers at
certain stations. Originating denied does not prevent a user from answering a ringing line, retrieving a
held call or receiving a transferred call.
Out-Dial Delay Time
With speed dialing, it is sometimes necessary for the system to wait a short time after selecting a line and
before dialing the number. This wait period gives the telephone company switching equipment time to
prepare to receive the dialed number. This feature provides a programmable wait time to match various
types of telephone company switching equipment.
P
Paging Access
This feature allows station users to dial-up customer provided loudspeaker paging equipment and page
over externally placed loudspeakers and determines what paging zones, if any, a station can page over.
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. While the passwords are the same at default, a programmer can change them as needed to provide
security against unauthorized program entries. 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 or defaulting ,
feature renumbering, and diagnostics. They can enter the administrator level, using the administrator
password, to perform most programming functions except those major changes just mentioned. When the
system is initially installed and programmed, or at any later time as needed, the installer programmer can
make the two passwords different to limit subsequent access to either programming level to certain
special or authorized people.
The system also provides two entry levels for main station database programming and provides a different
feature code for each entry. These feature codes default to certain values, but a programmer can change
them as needed to provide security against unauthorized program entries. These two different
programming entry levels are the system manager and the attendant levels. On-site system managers use
the system manager feature code to make many program changes in the system, line, station, and station
class of service parameters. Attendants use the attendant feature code to make routine changes in the
day-to-day operating parameters of the system such as revamping LCD messages, adding system speed
dial numbers, and setting the system clock.
The installer programmer can change the passwords and the feature codes from the default values to
custom ones whenever a change is needed. Also, the system manager can change the feature codes at any
time he or she chooses. When they change these passwords and feature codes, they should keep a record
of the new ones since the default words and codes will no longer provide entry to the programming.
Pause Time
During speed dialing, it is sometimes necessary for the system to delay the sending of dialed digits to give
telephone company switching equipment time to prepare to receive them.  This feature allows users to
store pauses as part of the stored number at the points in the numbering sequence where delays are
required.
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							PBX/CENTREX/Central Office Compatible
System features and programmable buttons support the requirements of most PBXs, Central Offices, and
CENTREX systems. Users can make numbers, #,T, programmable pauses, and flash signals a part of
every stored number for access to host system feature codes.
PC Attendant
Refer toAttendant Position, PC.
Periodic Line Tone
This feature provides periodic warning tones to station users while they are busy on certain lines. The
warning tone consists of one 500 ms burst, a 100 ms off period, and one100 ms burst. The tone reminds
the users to keep their conversations short on these lines. The system programmer can enable this feature
for a class of service of telephones and then specify the applicable lines. Further, he or she can select how
often the tone sounds.
Personal Intercom Number
Refer to the discussion titledIntercom Number.
Personal Intercom Number Preference
When a telephone goes off-hook, the system automatically connects it to the personal intercom number
assigned to the station.
Personalized Ringing Tone
This feature allows a station user with certain model telephones to choose one of several different ring
tones to aid in distinguishing one ringing station from another.
Pooled Line Access
Refer to the discussion titledLine Group Access.
Power Failure Transfer
A power failure line connection is available on each line interface board for connecting industry-standard
telephones such as a Comdial ATC or MaxPlus model. The system automatically connects these
power-fail telephones directly to certain lines whenever there is an AC power failure. During a power
failure, users can originate and receive calls on a power-fail station. The power-fail stations automatically
disconnect as soon as power is restored.
Preselection
This feature provides an override to the automatic line preference. If a station user presses a line button
on his or her telephone before lifting the handset, the station will go off hook on the selected line.
Prime Line
With this feature, a station automatically selects a line, line group, or intercom number for use when the
user takes it off hook. The feature can be over-ridden if the user preselects another line, line group, or
intercom number before lifting the handset. If the prime line is ringing, it is automatically answered when
the user lifts the handset—this feature can be used along with ringing line preference functions. Also
see—Ringing Line Preference.
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							Printer Interface
The system makes a wide variety of printout records available through a serial data port provided by a
communications card. The programmer can direct these printouts to the SMDR/SMDA data printer or to
the screen of the programming PC. Also refer to the discussions titledCommunications Card Support and
Serial Data Port.
Privacy
Refer to the discussion titledAutomatic Privacy.
Privacy Release
The programmer can assign a privacy button to a telephone. If a line has privacy release programmed for
it, a user can press the privacy button to change it into a non-private one.
Private Lines
Lines may appear at one station port or at selected station ports for call origination and reception yet may
not appear at other stations.
See the discussion titled Direct In Lines.
Program Printout
The system supports an RS-232 compatible, asynchronous serial data printer to the system.  When a data
printer is connected to a serial port, the programmer can command it to provide a printout of all or
selected database data, and the system administrator or attendant can command it to print selected data.
Programmable Button Flexibility
The programmable buttons accommodate any combination of line appearances, features, speed dial
numbers and other intercom numbers. A shift operation permits the station user to program speed dial
numbers on the second level. Through the button mapping programming procedure, the programmer can
assign functions and features to each button on every system station using a list of mnemonics (shorthand
titles for functions and features that the system software understands).
A button may be programmed as one of four things:
1. Feature button (including line group access)
2. Line direct appearance button
3. Intercom number button (DSS/ BLF)
4. Speed dial button - If shift is used, a second level of autodial storage is available.
Also refer to the discussions titledButton Mapping, Square / Non Square Configuration, andFull Button
Programmability Of Features.
Programming Port
Refer to the discussion titledDatabase Programming (From The Main Station).
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							Pulse/Tone Switchable
If the installation site is in an area that supplies rotary (pulse) dialing lines from the central office instead
of, or in addition to, tone (DTMF) dialing lines, the programmer can match the dialing mode of the line
port to that of the line.  If a rotary dial line is matched, further programming action matches the system
with the pulses-per-second rotary dial signaling of the line. The system defaults the line ports to match
tone dialing lines.
On those occasions when a user needs to send DTMF tones after making a call on a rotary line (to
generate banking-by-telephone codes for instance), he or she can dial a # to convert the dialing mode to
tone for the duration of the present call. The system changes it back to pulse when that call is completed.
Q
Quick Transfer
The quick transfer feature allows users to perform an automatic screened or unscreened transfer of an
incoming line call without pressing their telephone’s TRANS/CNF button. The transfer occurs
automatically as soon as the user who answers the call dials the intercom number or access code for the
transfer location. The system begins the call transfer process as soon as the user dials a digit on his or her
dial pad, and effects the transfer as soon as the user hangs up or presses his or her telephone’s RELEASE
button. When installers activate this feature, it greatly reduces the keystrokes that users must take to
transfer calls over a tie line.
R
Recall
Refer to the discussion titledTimed Recall.
Recall/Flash (TAP)
Refer to the discussion titledTAP (Flash)/Recall.
Relays
Refer to the discussion titledAuxiliary Ringer Interface.
Release Button
When a telephone is mapped with this button and a user presses it, the system discontinues the current
active operation and returns the station to an idle state. When used along with an answer button, the
release button provides rapid call handling.
Also refer to the discussions titledDatabase Program Storage and Password Protection.
Reminder Alert
A user can set up to two reminder alerts to sound at his or her telephone. The alert sounds at the station as
four short tone bursts, which continue until the user responds to the alert by pressing CLEAR. This
feature only works on digital stations that have interactive buttons.
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							Remote Programming And Diagnostics
Programmers can program the DXPPlussystem from a personal computer (PC) running the visual man
machine interface (VMMI) program. The PC can be connected directly to the maintenance port on the
services board or connected by modem through the public telephone network. For remote programming to
take place, an installer must connect the DXPPlusmodem between the maintenance port on the services
board and an outside telephone line, and connect a customer-supplied modem between the PC and an
outside telephone line. In addition to database programming, installers with the proper password entry can
perform maintenance routines and diagnose system malfunctions to the board level.
Remote Station Disable
This feature allows users at stations with the proper class of service to dial a code and remotely disable or
enable another station. Normally, the installer should give this capability to the system attendant but could
assign it to any class of service that is appropriate.
Response Messaging
Users can set messages to be received and displayed by calling LCD speakerphones. These messages
give information on the status of the called telephone. The system attendant usually programs customized
messages for use by the other telephone users, although the defaulted system does provide several general
purpose messages for use.
Telephone users can program a response message button on their telephones if they wish. This response
message button lets them make a non-verbal response to subdued off-hook voice announce calls or
intercom calls using the attendant-prepared response messages.
Restricted Dialing Error Tone
When you dial a toll-restricted number from your telephone, you will hear an intercom error tone
frequency with a continuous pattern of 250 ms on and 250 ms off. With earlier software, no audible error
indication is given.
If you have a LCD speakerphone, the message EXT or Code is displayed. The message
Dialing Deniedis
displayed instead.
Ring No-Answer (RNA) Call Forward
Refer to the discussion titledDefault Busy/Ring No-Answer.
Ring Back On Busy
With this feature disabled, when someone calls another telephone and the calling party is busy on an
outside line, the caller hears a ring back tone—not a busy tone. In this case, when the caller is using a
non-display telephone he or she has no means of knowing the busy status of the called party. (LCD
speakerphones can display called party status— for details on this display feature, see the paragraph titled
Allow Busy Display). Installers can take programming action on a individual station basis that allows
callers to hear a busy tone instead of a ring back tone when they call a party who is busy on an outside
line.
Ring Back On Transfer
Beginning with software release 3A, installers have the ability to control what outside parties hear while
the system transfers their calls to an internal extension. Prior to this software release, outside parties hear
whatever the music on hold source provides. With software release 3A, programmers can select ringback
tone in place of music on hold on a per line basis.
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							Ring Back Tone
By default, when callers call an intercom party, they receive an intercom ring back tone to tell them that
the called intercom station is ringing. Also, when they call over the CO line, they receive a CO-style ring
back tone to tell them that the distant CO telephone is ringing. Some system users find intercom ring back
tone confusing. When installers encounter this situation, they can take this programming action to assign
CO-style ring back tone to intercom calls on a system-wide basis.
Ring On Busy
If a user is on a speakerphone call (on certain model telephones) and a second call comes in to that
station, a quick subdued tone burst sounds. If the user does not wish to hear this tone burst, the
programmer can eliminate any ringing. For industry standard telephones, the system will send three short
tone bursts through the handset.
Ringing Line Preference
When this feature is active at a station, a ringing line is automatically connected to a station when the user
takes the handset off hook or presses the speaker button. No manual line selection is required.
S
Save Button Dial Storage
A user can dial digits and save them while on a call, which is useful should the distant party tell the user
of a number to call and the user wishes to save that number for later redial.
Saved Number Redial
Refer to the paragraph titledDynamic Save Button.
Screened Call Transfer
Refer to the feature discussion titled,Call Transfer–Screened.
Secure Account Code Display
Software release 3A enhances the SMDA/SMDR feature. Prior to software release 3A when a caller dials
his or her account code, the LCD speakerphone displays the dialed digits. With software release 3A, the
system programmer can activate the secure account code display that causes the LCD speakerphone to
display aSfor each digit instead of the dialed account code digits.
Self Diagnostics
Each station can execute a self test when so enabled. This test verifies processor, indicator, and tone
function.
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							Serial Data Port
The DXPPlusprovides two serial data ports on the CPU board and dedicates them to PC-based
programming and the remote maintenance modem. The installer can add up to 16 additional serial data
ports to the system for interfacing such items as open architecture interface applications, PC attendant
positions, and the SMDA data printer. He or she adds these serial data ports by installing communications
cards on the services board, the expansion cabinet interface board, and the main cabinet’s auxiliary board.
Each of these boards accepts two communications cards in its lower two slots.
The DXPPlussupports a maximum of 18 serial data ports. Serial data ports 1 and 2 are the dedicated
ports provided by the cpu board while communications cards provide the remaining 16 undedicated ports
(serial data ports 3–18).
The maximum available serial data baud rate is dependent upon the location of the communications card.
For cards located on the services board, the maximum baud rate is 19200 baud. For cards located on the
auxiliary board or on the interface boards, the maximum baud rate is 9600 baud. There are some
limitations involved. If a device is transmitting / receiving from the DXP Plus at a high rate, engineering
sources recommend the use of a communications protocol (RTS / CTS or XON / XOFF) to prevent
buffer overrun and data loss.
The maximum cable distance between a serial data device and a serial data port varies with the port’s
system location. The dedicated ports on the services board are limited to 25 feet of cable. The undedicated
serial ports on the services board are limited to 500 feet of cable when operated at the 19200 baud rate.
The undedicated serial ports on the auxiliary and interface boards are limited to 50 feet when operated at
the 9600 baud rate.
For related information, refer to the feature description titled,Communications Card Support.
Service Observing
Service observing is programmable as a station class of service feature.  It allows users to enter an
in-progress call in an unannounced muted mode, to monitor the conversation. No warning tones sound
when users make the call entry. This feature is useful in allowing a supervisor to monitor the
performance of an employee during a phone conversation with a client. In order for a station to use the
service observing feature, that station must have the initiate observe feature allowed and the telephone
being observed must  be programmed as observable while service observing is activated.  The station that
is being observed can continue to answer or originate multiple calls without disrupting the observing
station.
Shift Button
The programmer can button map a certain station to have a SHIFT button. If a telephone includes a
SHIFT button, the user can press it to reach a second level of speed dial storage.
Also see the paragraph titledStation Speed Dial.
Silent Mode Button
When a telephone is mapped with this button, the user can press it to turn off the ringer at his or her
station for the duration of the current ringing call. Ringer operation is restored when a new call rings at
the station.
Also refer to the discussion titledProgrammable Button Flexibility.
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