Comdial Dxp Plus Instructions Manual

							Dimensions (approximate):
Main Cabinet:
Width (inches) 23.75
Height(inches) 24.75
Depth (inches) 12.0
Weight (approximate pounds) 42  ( with cabinet, board cage, and backplane)
72  (with power supply and circuit boards added)
Expansion Cabinet:# 1 (Upper) # 2 (Lower)
Width (inches) 23.75 23.75
Height (inches) 24.75 24.75
Depth (inches) 12.0 12.0
Weight (approximate pounds) 72 -inc. cab., board cage, backplane, power supply,
and circuit boards
Station Cable Requirements:
Type #24 AWG minimum
2-wire (1-pair) twisted, non-shielded for IST
2-wire (1-pair) twisted, non-shielded for proprietary
digital telephones
4-wire (2-pair) twisted, non-shielded for proprietary
analog telephones
6-wire (3-pair) twisted, non-shielded for proprietary
analog telephones with SOHVA.
Maximum Length With 20 AWG With 22 AWG With 24 AWG
Digital Telephone 2500 feet 2000 feet 1500 feet
Analog Multiline Telephone 2500 feet 2000 feet 1500 feet
Analog Single Line Proprietary
Telephone 4000 feet 3500 feet 3000 feet
IST Telephone 4000 feet 3500 feet 3000 feet
Switching Principle Digital, pulse code modulated/time division multiplexed
(PCM-TDM)
Provides non-blocking switching with stored
program control
Operating Environment:
Temperature 32-122 degrees F (0-50 degrees C)
Humidity 90 percent relative, non-condensing
Heat Dissipation (Fully loaded main cabinet) 1474 BTUs per hour
Heat Dissipation (Fully loaded exp. cabinet) 1474 BTUs per hour
GCA40–130 DXP Plus General Description
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							Terminations:
Station: Standard 50-pin male connectors for connection to
external distribution field.
Line:Standard, 6-conductor mini-jack (USOC 14C)
Serial Data Ports:
CPU Board 1 at 9600 bps, 1 at 2400 bps
Com Card on Services Board 4 at maximum of 19,200 bps
Com Card on Auxiliary Board, or
Upper or Lower Interface Board 4 at maximum of 9600 bps
Format Serial, pseudo RS-232C
Parity None, Even, Odd (Programmable)
Data Bits 7 or 8 (programmable)
Stop Bits 1 or 2 (programmable)
Baud Rate Programmable in class of service
Handshaking X on  - X off
Hardware—CTS and RTS, None
Cable Length (serial data ports) 25 feet for dedicated serial ports on CPU board
50 feet com card on services board at 19,200 baud
500 feet com. card on auxiliary or
interface boards at 9600 baud
Music Interfaces (Two Inputs):
Input Level 3 Volts peak-to-peak maximum
Input Impedance Approximately 500 Ohms
Connector Modular jack
PA Port:
Output Level 400 Millivolts peak-to-peak (typical speech)
Output Impedance Approximately 500 Ohms
Connector Modular jack
Central Office Limits:
Loop Limits 1900 Ohms maximum loop
Cable Insulation Leakage 15,000 Ohms minimum
Industry/Regulatory Standards:
FCC Certified, Part 15 (Class A)
FCC registered (fully protected)
LISTED by OSHA-accredited, nationally recognized,
test laboratory
EIA RS478
Bell publication 02 guidance
Hearing aid compatible handset
DXP Plus General Description GCA40–130
Knowing The Specifications – 39 
						

							Memory Retention After Power Loss:
65 hours typical - without battery back up
FCC Registration Number:
Key System CVWUSA-65214-KF-E
Hybrid System CVWUSA-65213-MF-E
Ringer Equivalence Number:
0.4B
Product Codes:
Main Cabinet DXCBM–PLS
Expansion Cabinet DXCBX–PLS
Power Supply DXPSM–PLS
Power Supply (switchable) DXPSM–PLSSPS
Interface Board (main) DXINT–PLSMI
Interface Board (expansion)
upper cabinet DXINT–PLSX2
lower cabinet DXINT–PLSX3
Services Board DXSRV–PLS
Central Processor Unit Board DXCPU–PLS
Auxiliary Board DXAUX
Conference Boards DXCNF
DID Board DXPCO–DD8,–DD4
E1 Board (international applications) DXPE1–PLSxxx
T1 Board (domestic U.S.A. applications) DXPT1
Total Control PC Attendant DXPTC–PLS
Multipurpose Line Board DXPCO–GD4,– GD8
Communications Card DXOPT–COM
Digital Station Board DXDST–8
DXDST–16
Analog Station Board DXAST– 8
DXAST–16
Industry Standard Station Board DXIST–8
DXIST–16
Line Board DXPCO–LP4
DXPCO–LP8
Software Card (Flash Memory) DXPSW–PLS2
DXPSW–PLS4
Ring Generator For IST DXRNG–PLS
DTMF Receiver Card DXOPT–TON
External Battery Assembly BBPLS
External Battery Assembly (switchable) BBPLS–SPS
PC Attendant Position DXPTC–PLS
GCA40–130 DXP Plus General Description
40 – Knowing The Specifications 
						

							Product Codes–continued
Main Package Domestic: DXBKM–PLS
(includes main cabinet, Switchable: DXBKM–PLSS
power supply, CPU board,
services board, and modem)
Upper Expansion Package Domestic: DXBKX–PLSX2
(includes upper cabinet, Switchable: DXBKX–PLSSX2
main interface board,
upper interface board,
and power supply)
Lower Expansion Package Domestic: DXBKX–PLSX3
(includes lower cabinet, Switchable: DXBKX–PLSSX3
lower interface board,
and power supply)
Ringing Cadences:
Digital Intercom Ring 150 msec. on, 75 msec. off, 4 sec. between rings
Digital Trunk Ring 450 msec. on, 75 msec. off, 4 sec. between rings
Digital Recall Ring 275 msec.—300msec. on, 4 sec. between rings
Digital Camp–on Recall Ring 150 msec. on, 75 msec. off
Analog Intercom Ring 300 msec. on, 150 msec. off, 3.5 sec. between rings
Analog Trunk Ring 900 msec. on, 125 msec off, 3.5 sec. between rings
Analog Recall Ring 500 msec. on, 3.5 sec. between rings
Analog Camp–on Recall Ring 300 msec. on, 150 msec off
DXP Plus General Description GCA40–130
Knowing The Specifications – 41 
						

							5.1 FCC Rules And Regulations
This electronic key system complies with Federal Communications Commission (FCC) Rules, Part 68.
The FCC registration label on the DXP Plus contains the FCC registration number, the ringer
equivalence number, the model number, and the serial number or production date of the system.
Notification To Telephone Company
Unless a telephone operating company provides and installs the system, the telephone operating
company which provides the lines must be notified before a connection is made to them. The lines
(telephone numbers) involved, the FCC registration number, and the ringer equivalence number must be
provided to the telephone company. The FCC registration number and the ringer equivalence number of
this equipment are provided on the label attached to the common equipment. The user/installer is
required to notify the telephone company when final disconnection of this equipment from the telephone
company line occurs.
Compatibility With Telephone Network
When necessary, the telephone operating company provides information on the maximum number of
telephones or ringers that can be connected to one line, as well as any other applicable technical
information.  The telephone operating company can temporarily discontinue service and make changes
which could affect the operation of this equipment. They must, however, provide adequate notice, in
writing, of any future equipment changes that would make the system incompatible.
Installation Requirements
Connection of the electronic key system to the telephone lines must be through a universal service order
code (USOC) outlet jack supplied by the telephone operating company. If the installation site does not
have the proper outlet, ask the telephone company business office to install one. The correct outlet jack
for this system is either a type RJ21X or type RJ14C.
Party Lines And Coin Lines
Local telephone company regulations may not permit connections to party lines and coin lines by
anyone except the telephone operating company.
Troubleshooting
If a service problem occurs, first try to determine if the trouble is in the on-site system or in the
telephone company equipment. Disconnect all equipment not owned by the telephone company.
If this corrects the problem, the faulty equipment must not be reconnected to the telephone line until the
problem has been corrected. Any trouble that causes improper operation of the telephone network may
require the telephone company to discontinue service to the trouble site after they notify the user of the
reason.
GCA40–130 DXP Plus General Description
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							Repair Authorization
FCC regulations do not permit repair of customer owned equipment by anyone except the manufacturer,
their authorized agent, or others who might be authorized by the FCC. However, routine repairs can be
made according to the maintenance instructions in this publication, provided that all FCC restrictions are
obeyed.
Radio Frequency Interference
The electronic key system contains incidental radio frequency generating circuitry and, if not installed
and used properly, may cause interference to radio and television reception.  This equipment has been
tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part
15 of FCC Rules. These limits are designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this equipment in a residential area may
cause interference to radio and television reception; in which case the user is encouraged to take
whatever measures may be required to correct the interference. If this equipment does cause
interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient the television or radio’s receiving antenna, and/or relocate the
DXPPlus, the individual
telephone stations, and the radio or TV with respect to each other. If necessary, the user should consult
the manufacturer or an experienced radio/television technician for additional suggestions. The user may
find the following booklet prepared by the Federal Communications Commission helpful: “How to
Identify and Resolve Radio-TV Interference Problems.” This booklet is available from the Government
Printing Office, Washington D.C. 20402.  Stock No. 004-000-00345-4.
This digital apparatus does not exceed the (Class A) limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
Le pre’sent appareil nume’rique n’emet pes de bruits radioe’lectriques de’passant les limites applicables
aux appareils nume’riques (de la class A) prescrites dans le Re’glement sur le brouillage radioe’lectrique
e’dicte’ par le ministe’re des Communications du Canada.
Ringer Equivalence Number
The REN of each line is 0.4B. The FCC requires the installer to determine the total REN  for each line,
and record it at the equipment..
DXP Plus General Description GCA40–130
Knowing The Specifications – 43 
						

							Understanding The Features
6.1 DXP Plus Features List
This list details all of the features available on the DXPPlus.Use it as a pre-installation check list.
6
Abandoned Hold Release
Adjunct Feature Module
Access Denied
Account Code Button
Account Codes With Positive
Verification
All Call Paging
Allow Ringer Off(Ringer Volume Off)
Alpha-Numeric Calling Party and Line
Display
Alternate Attendant
Answer Button
Area Paging Interface
Attendant Position
Attendant Position, PC
Authorization Code
Automatic Dialing
Automatic Hold - Intercom To
Intercom/Line
Automatic Hold - Line To Intercom
Automatic Hold - Line To Line
Automatic Pause Insertion
Automatic Privacy
Automatic Number Identification (ANI)
Automatic Redial
Automatic Reports
Automatic Route Selection
Automatic Station Relocation
Auxiliary Equipment Interface
Auxiliary Station Ringer Interface
Background Music*
Battery Backup (Chassis, Cable, and
Batteries)
Battery Backup Interface
Block Programming
Busy Button Inquiry
Busy On SOHVA
Button Query
Call Announce Beeps
Call Announce With Handsfree
Answer-back
Call Costing and SMDA Reports
Call Forward - All Or Personal
Call Forward- Immediate
Call Forward - Busy Or RNA, All Or
Personal
Call Forward Outside System
Call Park
Call Park Recall
Call Pick-Up - Directed
Call Pick-Up - Group
Call Pick-Up - System
Call Transfer - Screened
Call Transfer - Unscreened
With Automatic Camp On
Call Waiting Tone
Caller ID
Caller ID–RNA
Camp-On With Automatic Call Back
Camp-On - Call Waiting
Camp-On - No Answer
Clear Major Alarm Ring
Central Message Desk
Central Processor Switched Data Port
Configuration
Centrex Compatible
Common Audible Ringer Interface
Conferencing - Multiline
Conference Advisory Tone
Console Support
Console-Less Operation
Communications Card Support
Consultation Hold
Copy Model
Data Base Program Storage Via PC
Interface
Data Base Programming From Main
Station (Limited)
Data Base Programming With Personal
Computer And Visual Man Machine
Interface (VMMI) Software
Day One and Day Two Ringing
Default Busy/RNA Call Forward
Default Functional Programming
Delayed Ringing
Dial 0 for System Attendant
Dial Plus Interdigit Time
Digital Voice Announce
Dialed Number Identification Service
(DNIS)
Digital Wireless Telephone Support
Direct Inward Dialing (DID)
Direct Inward System Access (DISA)
Direct Line Access by Station
Direct Line Group Selection
Directed Station Hold
Disconnect Supervision
Discriminating Ringing
Do Not Disturb
Do Not Disturb Inhibit
Do Not Disturb Override
DSS Status Button
Dynamic Save Button
E1 Digital Carrier Transmission Option
E&M tie Line support
End to End DTMF Signalling
End to End Signalling on Intercom
End to End Signalling on Lines
Enhanced LCD Display
Exclusive Hold
Executive Override
Executive Override Advisory Tone
Executive Override Block
Extended DTMF Tones
DXP Plus General Description GCA40–130
Understanding The Features – 45 
						

							Existing Comdial Telephone Support
ExecuMail Integration
External Paging Interface
Feature Inhibit
Feature Renumbering
Flexible Ringing Assignment
Flexible Ringing Assignment Of The External
Paging Port
Flexible Station Numbering Plan
Ground Start Lines
Group Intercoms
Handsfree Answer Inhibit
Handset Volume Control
Headset Capability
Hold
Hold, Exclusive
Hold Queuing
Hold Time Reporting
Hot Transfer
I Hold and I Use Indications
Idle Line Preference
Idle Line Priority
Industry Standard Telephone Support
IST Hold Confirmation
IST Offhook Treated As Busy
IST Message Wait Retrieval Access Code
IST Ring Frequency
IST Ring Patterns
Interactive Button Support
Intercom Call Progress Tones
Intercom Hunt List
Intercom Interdigit Dialing Time-out
Intercom Time-out
Intercom Number
Key/Hybrid Configuration
Last Number Redial
Line Access Restriction
Line Answer From Any Station
Line Appearance, Enhanced
Line Groups
Line Group Access
Line Names
Line Out Softkey Option
Line Queuing
Liquid Crystal Display (LCD) Messaging
Liquid Crystal Display (LCD) Support
Location Code
Lock Button
Manual Exclusion
Manual Reset
Mark Problem Line
Master Clear
Maximum Call Duration
Meet-Me Answer Page
Memory Retention Without Batteries
Message Deposit
Message Waiting
Mnemonic Programming
Modem Support
Modify Digits Table
Multiple Attendant Positions
Multipurpose Line Board
Music Interface*
Music On Hold*
Mute
Names (Stations And Lines)
Night Service Automatic Switching
Night Transfer (Of Ringing)
Off-Premise Extension (OPX)
On-Hook Dialing
Operator Station
Originating Denied
Out Dial Delay Time
Password Protection
Pause Time
PBX/Centrex/Central Office Compatible
Personal Intercom Number
Paging Access
Periodic Line Tone
Personal Intercom Number Preference
Personalized Ringing Tone
Pooled Line Access
Power Failure Transfer
Preselection Prime Line
Printer Interface
Privacy
Privacy Release
Private Lines
Program Printout
Programmable Button Flexibility
Programming Port
Pulse/Tone Switchable
Quick Transfer
Remote Programming and Diagnostics
Remote Station Disable
Release Button
Reminder Alert
Restrict ARS Hookflash(Automatic Route
Selection, Hookflash Restriction)
Restricted Dial Error Tone
Response Messaging
Ring Back On Busy
Ring Back On Transfer
Ring Back Tone
Ring No Answer Call Forward
Ring On Busy
Ringing Line Preference
Secure Account Code Display
Save Button Dial Storage
Saved Number Redial
Self Diagnostics
Serial Data Port
Service Observing
Shift Button
Silent Mode Button
Single-Line Proprietary Telephone Support
SMDA Reports
SOHVA Beeps(SOHVA Tone Bursts)
Speakerphone Support
Split Button
Square/Non-Square Configuration
Station Hunting
Station Class Of Service
Station Message Detail Accounting (SMDA)
Station Message Detail Recording (SMDR)
Station Monitoring with DSS Call Pickup
Station Names
Station Speed Dial
Subdued Off-Hook Voice Announce
Subdued Off-Hook Voice Announce Groups
Subdued Ringing
Synchronized Ringing
System Clock
System Speed Dial
System Status Reports
T1 Digital Carrier Transmission Option
Tap (Flash)/Recall
Telephony Services Application Programming
Interface (TSAPI) Support
Through Dialing
Tie Lines
Time And Date
Timed And Immediate Recall
Toll Restriction
Toll Restriction Pause Entries
Tone or Voice Signalling on Internal Calls
Transfer/Conference Button
Transfer Ring Cadence
Unsupervised Conference
Voice Announce Blocking
Voice Mail Integration Digits
Zone Paging
* The system is equipped with two inputs for separate customer-supplied music sources.
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							6.2 Defining The Features
The following section defines all of the DXPPlusfeatures. Read through all of these definitions before
programming the DXP Plus to ensure that you are programming the desired feature.
A
Abandoned Hold Release
If a distant on-hold party hangs up, it may cause an interruption in the line current. The DXP Plus system
then drops the line from the hold condition and returns it to service.  You can program the time interval
between hang-up and line-drop with choices of either 50 milliseconds or 350 milliseconds. The central
office makes the arrangement for the time choice. Also refer to the discussion titled, Disconnect
Supervision.
Access Denied
If you have programmed the system to do so, it can deny access to particular lines and group intercoms at
certain telephones. A user cannot select a line for use if it is access denied at his or her telephone.
Account Code Button
As part of the button mapping, the system installer can assign a special button that the user may use to
apply an account code to a call. Refer to the discussion titledAccount Codes With Positive Verification.
Account Codes With Positive Verification
Station users can assign account codes to specific calls. The system uses the account codes to identify
calls by category, or special grouping, for call accounting purposes. All calls with the same account code
are reported together by the station message detail accounting (SMDA) feature. The system attendant can
obtain a separate printout of calls assigned to one account without causing any other calls to print or be
deleted. The programmer can arrange for the system to verify that the user entered an account code and
to sound an error tone if an invalid account code is entered.  If the programmer arranges it, attendants can
use account codes as a basis for SMDA print-outs. He or she may program the system to prompt station
users to enter account codes for incoming calls and/or out-going calls if desired. The prompt can be with
or without system verification of the entry. Alternately, account code prompting can be turned off
completely. Depending upon the type of call, different users are associated with the call accounting
record. The following list explains to whom the call record is associated:
·On out-going calls, the user who enters the account code
·On transferred calls, the transferee
·On incoming calls, the last user active on a call.
Account codes may be from three to 16 digits in length as set by class of service programming. The
system will verify all digits. Also refer to the discussion titledAccount Codes With Positive
Verification—forced.
DXP Plus General Description GCA40–130
Understanding The Features – 47 
						

							Account Codes With Positive Verification—Forced
Station users can assign account codes to specific calls. The system uses the account codes to identify
calls by category, or special grouping, for call accounting purposes. If the programmer programs the
system to have forced account codes, the user must enter the account code before the call can be placed.
If the system does not find a match between a user entered account code and one that the programmer has
set in the system, the call will not be allowed. Remember, verification alone does not deny users’ calls,
only forced verification denies.  The programmer can arrange for the system to verify that the user entered
an account code and to sound an error tone if an invalid account code is entered. If the programmer
arranges it, attendants can use account codes as a basis for SMDA print-outs. He or she may program the
system to prompt station users to enter account codes for incoming calls and/or out-going calls if desired.
You can program the system to recognize emergency numbers that do not require account codes.
Account Code Display And Display Time
For LCD speakerphone users, a message appears in the telephone’s display prompting the user to enter an
account code for incoming or outgoing calls. If the user does not require this prompt, the programmer
should turn off the prompting message display.
Adjunct Feature Module Support
When the installer includes a 16-button adjunct feature module with certain model Comdial proprietary
telephones, that module extends the programmable buttons of the telephone by 16 buttons and status
lights. The users can program these buttons for speed dialing and direct station selection (DSS) with busy
lamp field (BLF) status lights.
All-Call Paging
Refer to the discussion titledZone Paging.
Allow Ringer Off (Ringer Volume Off)
On some proprietary telephones, the user selects the ringer volume level by pressing a rocker-type volume
control repeatedly to select one of four different volume levels. The lowest volume setting is essentially
an off condition as the telephone sounds only one low-volume ring burst when a call rings the station.
Sometimes users would rather not receive even one ring burst. For these cases, installers can program the
system so that it completely silences the ringer at a telephone when its user selects the lowest volume
setting.
Alpha-Numeric Calling Party And Line Display
An LCD speakerphone, when receiving an inside call, displays the caller’s name (up to seven characters),
for example, “John L”. The system uses the remaining nine characters on the display for status messages
(for example, “Fwd from”). The system also displays the logical line number of the current line. Also see
the discussion titledLiquid Crystal Display Support.
Alternate Attendant
Refer to the discussion titledAttendant Position.
GCA40–130 DXP Plus General Description
48 – Understanding The Features