Comdial Dxp Plus Instructions Manual

							Idle Line Programming
Idle Line Preference
With you enable this feature, a station automatically connects to an idle line when the user lifts the telephone’s
handset.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select COS programming and press ENTER.
4. Type class of service number (1-32) and press ENTER.
5. Fro COS programming menu, type item number for feature and press ENTER.
6. Press SPACE bar for feature setting.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Repeat steps 4-8 for each COS or press ESCAPE to end.
Idle Line Priority
If you give a station the ability to automatically connect to an idle assigned line when the user takes the handset
off-hook, take this programming action to set the priority in which the system chooses the idle lines for use. You
can place up to eight lines in this priority list.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Type any eight line numbers (type as n,nn,nnn or n–nnn) and press ENTER.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Repeat steps 4-8 for each station or press ESCAPE to end.
Ringing Line Preference
When you enable this feature, a station can automatically connect to a ringing line when a user takes his or her
telephone off-hook.
1. Press CONTROL T for main menu.
2. From the main menu, select stations and press ENTER.
3. From the stations menu, select COS programming and press ENTER.
4. Type class of service number (1-32) and press ENTER.
5. From the COS programming menu, type item number for feature and press ENTER.
6. Press SPACE bar for feature setting.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Repeat steps 4-8 for each COS or press ESCAPE to end.
Installing And Programming The OPX-X IMI89–209
Installing The OPX-X – 11 
						

							Dialing Mode
Program the line port to match either a DTMF tone or a rotary (pulse) dialing line as supplied by the central office
(CO).
1. Press CONTROL T for main menu.
2. From main menu, select lines and press ENTER.
3. From lines menu, select line programming and press ENTER.
4. Type line port number or name and press ENTER.
5. From line programming menu, type item number for feature and press ENTER.
6. Press SPACE bar for feature setting and press ENTER to accept setting.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Repeat steps 4-8 for each line port or press ESCAPE to end.
Pulse Dial Make/Pulse Dial Break (Pulse Dial Ratio)
Use this procedure to set the make/break ratio for rotary dial signalling to match rotary dial line requirements.
You can set the line make/break ratio for rotary dial (pulse dial) signalling in a more flexible manner to match
many different rotary dial line requirements. You can set the make time and the break time independently in one
msec. increments to any time from one to 99 msec.
1. Press CONTROL T for main menu,
2. From main menu, select system and press ENTER.
3. From system menu, select timing and press ENTER,
4. From timing menu, type item number for line pulse make and press ENTER.
5. Type desired time (1–99) and press ENTER,
6. From timing menu, type item number for line pulse break and press ENTER.
7. Type desired time (1–99) and press ENTER.
8. Press ESCAPE twice,
9. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
Pulse Dial Interdigit Time
You can set the interdigit time between dial pulses when the system pulse-dials a number over a line. The digital
communications system defaults this time to 200 msec. and provides a range of timing values between 100 msec.
and one sec. that you can set in 100 msec. increments.
1. Press CONTROL T for main menu,
2. From main menu, select system and press ENTER.
3. From the system menu, select timing and press ENTER.
4. From timing menu type item number for feature and press ENTER.
5. Press SPACE bar to select desired time and press ENTER to select setting.
6. Press ESCAPE twice,
7. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
IMI89–209 Installing And Programming The OPX-X
12 –  Installing The OPX-X 
						

							Flexible Ringing Assignments
Program ringing assignments on a per station/per line/per intercom number basis.  Ringing can be immediate,
delayed, or special purpose. Use the procedures in this section to customize the ringing features for the system.
Direct Ringing
Use this procedure to choose the line ports that you want to ring at a station as soon as a call appears. Direct
ringing sounds during the day 1 and day 2 time periods but does not ring during the night ringing mode or during
the manual night transfer (of ringing) operation.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type the item number for feature and press ENTER.
6. Press CONTROL E for edit.
7. Type a for add or r for remove and press ENTER.
8. Type line port number (type as n,nn,nnn or n–nnn) and press ENTER.
9. When finished, press ESCAPE twice.
10. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
11 Repeat steps 4-10 for each station or press ESCAPE to end.
Delayed Ringing
Use this procedure to choose the line ports that you want to ring at a station after waiting a short time period from
when a call appears. Delayed ringing sounds during day 1, day 2 time periods, during the night ringing mode, and
during the manual night transfer (of ringing) operation.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Press CONTROL E.
7. Type a for add or r for remove and press ENTER.
8. Type line port number (type as n,nn,nnn or n—nnn) and press ENTER.
9. When finished, press ESCAPE twice.
Installing And Programming The OPX-X IMI89–209
Installing The OPX-X – 13 
						

							Day 1 Ring
Use this procedure to choose the line ports that you want to ring at stations during the day 1 ringing mode time
period. Refer to the paragraph below titled, Day 1, Day 2, and Night Ringing Begin and End Times, to set the
beginning and ending times of this ringing.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
7. Type a for add or r for remove and press ENTER.
6. Press CONTROL E to edit.
8. Type line port number (type as n,nn,nnn or n–nnn) and press ENTER.
9. When finished, press ESCAPE twice.
10. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
11. Repeat steps 4–10 for each station or press ESCAPE to end.
Day 2 Ring
Use this procedure to choose the line ports that you want to ring at stations during the day 2 ringing mode time
period. Refer to the paragraph below titled, Day 1, Day 2, and Night Ringing Begin and End Times, to set the
beginning and ending times of this ringing.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Press CONTROL E to edit.
7. Type a for add or r for remove and press ENTER.
8. Type line port number (type as n,nn,nnn or n–nnn) and press ENTER.
9. When finished, press ESCAPE twice.
10. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
11. Repeat steps 4-10 for each station or press ESCAPE to end.
Day 1, Day 2, And Night Ringing Begin And End Times
With this programming procedure, set the begin and end times of the day 1, day 2, and night ringing time periods.
1. Press CONTROL T for main menu.
2. From main menu, select system and press ENTER.
3. From system menu, select system parameters and press ENTER.
4. From the system parameters menu, select day 1, day 2 or night ringing begin times
and press ENTER.
5. Type times in 24–hour format (hh:mm) and press ENTER.
6. Press ENTER (repeatedly if needed) to place cursor at next time desired setting.
7. Repeat step 5 and press ENTER.
8. Repeat steps 6 and 7 until all times are set and press ENTER.
9. When finished, press ESCAPE twice.
10. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
11. Repeat steps 4-10 for each station or press ESCAPE to end.
IMI89–209 Installing And Programming The OPX-X
14 –  Installing The OPX-X 
						

							Night Ring (Night Transfer - Of Ringing)
Choose the line ports that you want to ring, along with the delayed ringing line ports, at stations during the night
ringing mode of operation. The ringing arrangement that you configure here is the arrangement that is active both
during the automatic night ringing time period and whenever the attendant manually activates the night transfer
(of ringing) operation. Do note that the attendant commanded night ringing period supersedes the automatic night
ringing period. Refer to the above paragraph titled, Day 1, Day 2, and Night Ringing Begin and End Times, to set
the time for the automatic night ringing period.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Press CONTROL E.
7. Type a for add or r for remove and press ENTER.
8. Type line port number (type as n,nn,nnn or n–nnn) and press ENTER.
9. When finished, press ESCAPE twice.
10. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
Ring No-Answer Rings
This procedure sets the amount of rings that sound at one station port before the call rolls over to ring at another
station port. Any system feature that requires a ring no-answer value (for example, call forwarding) uses the
setting that you program here.
The system defaults the ring no-answer value at regular station ports to four rings, and it defaults ports
programmed to function as voice mail ports to three rings. This insure that, at default, the voice mail equipment
will have sufficient time to answer a call before it rolls over to the next port.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name
and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Type number of rings 0–6 and press ENTER.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing
and press ENTER.
9. Repeat steps 4-8 for each station or press ESCAPE to end.
Installing And Programming The OPX-X IMI89–209
Installing The OPX-X – 15 
						

							Personalized Ringing Tone
Program a station to ring in one of several distinctive tones for proprietary digital telephones and in one of four
distinctive tones for analog telephones.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name and press ENTER.
5. From the station programming menu, type item number for feature and press ENTER.
6. Type ring tone choice and press ENTER.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Repeat steps 4-8 for each station or press ESCAPE to end.
While industry-standard telephones do not provide personalized ringing, you can set distinctive ringing for them.
An industry-standard telephone can sound one ring cadence for intercom calls and a different ring cadence for
outside calls or it can sound the same ring cadence for both types of calls. You must select one of these ringing
styles on a station class of service basis.  All industry-standard telephones with the same class of service have the
same ringing style.
NOTE: Do not enable distinctive ringing for voice mail ports.
1. Press CONTROL T for main menu.
2. From main menu, select stations and press ENTER.
3. From stations menu, select COS programming and press ENTER.
4. Type class of service number (1–32) that corresponds with class of service assigned
to the IST and press ENTER.
5. From COS programming menu, type row number for IST distinctive ringing
and press ENTER.
6. Press SPACE bar for feature setting.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9. Press ESCAPE to end.
Through Dialing (Thru-Dialing)
This procedure allows DTMF tones that are generated by an external device connected to the system through
necessary interface equipment to pass through the system and out to any line connection.
1. Press CONTROL T for main menu.
2. From main menu, select station and press ENTER.
3. From station menu, select station programming and press ENTER.
4. Type personal intercom number or previously assigned name of station being programmed
and press ENTER.
5. From station programming menu, type item number for feature and press ENTER.
6. Press SPACE bar for desired setting and press ENTER.
7. When finished, press ESCAPE twice.
8. Type y to accept changes, n to reject them, or r to resume editing and press ENTER.
9 . Repeat steps 4–8 level for each station or press ESCAPE to end.
Charlottesville, Virginia 22901-2829
R
World Wide Web:  http://www.comdial.com/
Accredited by the Dutch Council
for Certification for certification
and registration activities.
Comdials Quality Management System Is
Certified To The ISO 9001 Standard.
IMI89–209 Installing And Programming The OPX-X 
						

							Installing and Programming The ISDN–PRI Interface
In The DXP Plus Digital Communications System
Introducing The ISDN–PRI Interface
Integrated Services Digital Network (ISDN) provides integrated voice and data over a common telephone
company facility. There are two methods of ISDN access that are currently available: ISDN–BRI (basic) and
ISDN–PRI (primary). ISDN–BRI provides a way for subscribers to get digital service from the telephone
company supplier for two telephones or a telephone and a data device over one special pair of wires. ISDN–PRI
provides a way for subscribers to get digital service from the telephone company supplier for 24 lines over two
special pairs of wires. This latter method is the concern of this publication.
ISDN–PRI access directly connects a multiple-station, digital communications system to the telephone company’s
ISDN network through a single high-speed line. This high-speed line is commonly known as T1 in North America
and consists of 24 digitized channels. ISDN–PRI access consists of a grouping of 23 voice channels (B–channels)
and one signalling or control channel (D–channel). B–channels are clear channels suitable for voice or data
transmission while the D–channel is a packet-switched link for call set-up and signalling. When you use
ISDN–PRI access with T1, one of the T1 channels serves as the signalling channel. This arrangement is
sometimes referred to as 23B+D ISDN service.
The DXPRI is a circuit card that you install on a revision B or later DXPT1 line board with special-purpose
firmware to provide ISDN–PRI access to the digital communications system. The DXPRI card handles the
D–channel signalling protocol and passes messages to the DXPT1 board. A single DXPRI card can control
multiple DXPT1 boards when you tie the boards together through board programming action. This arrangement
(known as NFAS or Network Facility Associated Signalling) allows the system to derive 24 B–channels from all
boards except the one where installers have added the the DXPRI card. When installers do this, the
DXPT1/DXPRI combination that provides the control is designated as DXPT1–PRI; and the boards being
controlled are designated as DXPT1–NFAS. The NFAS boards do not require a DXPRI card as they are slaves to
the master –PRI board. Throughout the remainder of this publication, the term T1/PRI means a T1 board
specifically configured for ISDN–PRI operation be it either a DXPT1–PRI or a DXPT1–NFAS board.
Since central office protocols differ, the DXPRI card supports several protocol arrangements and provides
interface support for several signalling types. The programmer and the end user can select the interface support
that the system needs for a particular application. The support that they choose determines the way that the
telephone company treats the signal.
The DXPRI card provides a calling number identification feature that provides the following services: delivery of
network provided calling numbers, calling line identification presentation (CLIP), or automatic number
identification (ANI). On originated calls, the system automatically provides the calling number if available;
otherwise, it provides the default directory number. For incoming calls, the called station displays the calling
number if available; otherwise, the display shows information determined by station class of service
programming. The system programmer can customize the caller ID parameters for outgoing calls as site
requirements dictate.
This manual has been developed by Comdial Corporation (the “Company”) and is intended for the use of its customers and service personnel. The information in this manual is subject to change
without notice. While every effort has been made to eliminate errors, the Company disclaims liability for any difficulties arising from the interpretation of the information contained herein.
The information contained herein does not purport to cover all details or variations in equipment or to provide for every possible contingency to be met in connection with installation, operation, or
maintenance. Should further information be desired, or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, contact Comdial, Inside Sales Department,
Charlottesville, Virginia 22906.
Printed in U.S.A.IMI89–255.01
12/96
R 
						

							Introducing The T1/PRI Line Board
The revision B or later DXPT1 board with special-purpose firmware serves as host for the DXPRI card and gives
gives the digital communications system the capability to handle up to 24 channels of voice and/or data
transmissions over a single four-wire cable using multiplexing techniques. The DXPT1 board includes a customer
service unit (CSU) to eliminate the need for a external CSU.
Defining T1/PRI Operation
T1/PRI is the digital two-way transmission of telecommunications over a single high-speed circuit. Up to 24
separate voice or data transmissions form digital pulses that are transferred at the rate of 1.544 million bits per
second (Mbps) over the T1/PRI trunk. At the receiving end, the digital pulses are decoded into 24 separate circuits.
Pulse characteristics such as repetition rate, pulse width, pulse amplitude, and average ones density ((ratio of one
(1) bits to zero (0) bits)) are as specified by digital signal level 1 (DS-1) described in American National
Standards Institute Specification, ANSI T1.403-1989.
Detailing Where You Can Install T1/PRI Boards and Its Supporting Needs
Since the DXPPlussupports a maximum of 240 lines, and each T1/PRI board handles up to 24 channels, you can
install up to 10 boards in the DXPPlussystem. You can install these 10 boards in any available universal board
slot in the main or expansion cabinets. Of course, any other line boards that you install, such as loop start, DID or
multipurpose, reduce the number of lines available for T1/PRI service and thus reduces the number of T1/PRI
boards that you can install.
Whenever you install one or more boards, and the DXPPlusis receiving its timing signals from an external
source (the usual case), you must install one synchronization card (DXOPT–SYN) on the services board. This
means that when you connect the system to central office (CO) lines, you must include a synchronization card,
and the DXPPlusclock must be controlled by CO signalling.
If you are unfamiliar with the terms and component names associated with the T1/PRI digital carrier transmission
option, refer to paragraph titled,Defining The T1/PRI Terms, at the end of this publication.
CAUTION
For operation with the DXP Plus, the T1/PRI board must be Revision B or higher and have
special-purpose firmware installed.
IMI89–255 Installing And Programming The DXPRI Card
2 – Introducing The T1/PRI Line Board 
						

							Understanding The DXOPT-SYN Synchronization Card
The DXOPT–SYN card uses a reference timing frequency of 8 KHz that it derives from the 1.544 MHz frequency
supplied to the T1/PRI board by the central office (CO) or other external source. By referencing this 8 KHz with
8 KHz timing derived internally, the master 16.384 MHz voltage-controlled oscillator (VCO) can be
synchronized. The transmit clock (1.544 MHz) is derived from the 16.384 MHz frequency on the T1/PRI board. If
the 1.544 MHz received frequency is incorrect (not within a 200 Hz tolerance), the system may loose
synchronization with the CO or other external source. The DXOPT–SYN card reports this condition by turning on
the appropriate alarms on the T1/PRI board and DXOPT–SYN card. A loss of clock synchronization causes frame
slips that result in data communications errors.
The DXOPT–SYN card allows two timing references ( primary and secondary) to be selected. You can select
either automatic or manual (for maintenance mode). In the automatic mode, a loss of primary timing causes the
system to switch to the secondary timing reference. If both the primary and secondary timing references are lost,
the VCO oscillator on the DXOPT–SYN card is defaulted to the fixed 16.384 MHz oscillator on the services
board. This results in the loss of clock synchronization.
Installing And Programming The DXPRI Card IMI89–255
Understanding The DXOPT-SYN Synchronization Card – 3 
						

							Configuring The T1/PRI Board
When the factory arranges the T1/PRI board for ISDN–PRI support, it installs the DXPRI card and the
appropriate chip firmware on both boards. For field-up grade of existing T1 boards, you must install the DXPRI
card on your existing DXPT1 board and change the firmware on the DXPT1. For instructions to do this, refer to
the paragraph titledUp-Grading Your DXPT1 Board For ISDN–PRI Support, located at the end of this
publication.
Before you install a T1/PRI board in the digital communications system, determine if you must meet special
system requirements. If you do have special system requirements, use the dual in-line pin (DIP) switches provided
on the board to re-configure the T1/PRI board.
The board contains 28 DIP switches (three 8-position modules and one 4-position module). Rectangular cutouts in
the front-edge panel provide access to these switches.
The eight DIP switches nearest the bottom of the panel are accompanied by eight green LED indicators.
NOTE: These eight switches and their associated indicators are for diagnostic purposes only. The setting of these
switches does not effect the function of the T1/PRI board. The recommended setting for switches 1, 2, and
4–8 is 0 and the recommended setting of switch 3 is 1. These settings cause the green diagnostic lights to
give information about PRi layer 3 and 3 operation.
The remaining 20 DIP switches labeled SW1, SW2. and LIU are for configuring the T1/PRI board to meet
specific operating requirements. The default setting for all of these switches is 0 except for LIU–2, which you
should set to 1. This is the standard configuration for most customer applications. However, special customer
needs may require that you reset one or more of these switches using the procedure given below.
1. Obtain a static discharge wrist strap and attach it to one of your wrists. Make sure to adjust the strap for a
snug fit against your skin; do not apply the strap over any of your clothing.
2. Connect one end of the wrist strap-cord to the wrist strap and the other end to earth ground.
NOTE: With the DXP cabinet in the installed position, the ground lug on the right side of the cabinet is normally
a good grounding point since this lug should have a heavy ground wire connected between it and a good
earth ground.
3. Remove the T1/PRI board from its static protection bag and set it on a static-safe work area.
4. Using a ball-point pen or similar object, move the DIP switches from left (0 position) to right (1 position) as
needed. All DIP switches are facing left for typical applications. The paragraph titled,Setting The T1/PRI
Switches,details the DIP switch descriptions
IMI89–255 Installing And Programming The DXPRI Card
4 – Configuring The T1/PRI Board