Comdial Dxp Plus Instructions Manual

T1003A
Front View of Main Connector
On DXPT1 Board
1R1
RC1
ReceiveC1
Transmit
T1
T 2
3
4
5
6
7
8
Connecting The ISDN–PRI Line To the T1/PRI Board
Installing And Programming The DXPRI Card IMI89–255
Connecting The ISDN–PRI Line To The System – 25 

Programming The System For ISDN–PRI Application
To arrange the DXPPlussystem for ISDN–PRI operation, you must take the following programming actions:
·Use Board Configuration programming to program the ISDN service features.
·Use Line programming to make every ISDN line a PRI B Channel line type and make the DID/DNIS
programming choices.
·Use Line Group programming to group together the lines that correspond to the T1/PRI channels.
·Use Station programming menu to program the specific ISDN requirements...

Primary D-Channel Board—Designate the board that provides the D-channel signalling for a NFAS group with
this programming feature. Make the same designation for every board in a NFAS group including the primary
board.
NOTE: When you are using Visual Man-Machine Interface (VMMI) to program, the system automatically applies
the Primary D-Channel Board setting where appropriate.
Interface Number—If you select any item except non-member for the NFAS membership mode, you must enter
the CO-supplied group...

Line Programming
Conditioning a line port as PRI B Channel.
When you plan for a line to provide ISDN–PRI service, you must program it to be a PRI B Channel line. The
system automatically defaults to this programming setting for any lines that you assign to a T1/PRI board. With
the line conditioned to be a PRI B Channel line, you must set the DID/DNIS parameters for the line.
Making The DID/DNIS Programming Choices
The common carrier supplies DNIS information as DTMF digits. When the DNIS feature is...

DISA Voice Options—Type DVA message identification number (1–4) and press ENTER.
Use the DISA Voice Options 1 through 4 to select digital voice announce (DVA) message levels. For
example, selecting DISA voice option 2 will cause welcome greeting 2, day main menu 2, night main
menu 2, recall no answer 2, and recall busy 2 prompts to play whenever a DISA-configured DID line is
covered by DVA.
Alternate Routing—Type intercom number (up to four digits) for station to handle misdialed calls.
Use this...

Line Group Programming(For ISDN–PRI Service)
When you provide ISDN–PRI service to system stations through a T1/PRI connection to the central office (CO),
you should do so through line group access rather than individual line connections. Remember, one T1/PRI
connection to the system yields 23 channels for communications to and from the stations (24 channels for
DXPT1–NFAS boards). While these channels correspond to line ports within the system, line designations such
as Line 1, Line 2 and so forth are...

Station ID(future feature)
The system can transmit a Station ID using ISDN display and/or sub-address messages. The system transmits the
station ID when you choose eitherstation numberordefault with station IDinBoard Configuration
Programming. This feature, when supported by the central office equipment, includes a station’s full name or
extension number as additional caller ID information. You can choose three different ID types:
None—no station ID information supplied for this station,...

Understanding The T1/PRI Alarms And Indicators
Most of the T1 alarms and indicators (LEDs) are located on the front-edge panel of the T1/PRI board, while
several are located on the front edge of the DXOPT-SYN card. The following sections discuss the alarms and
indicators.
NOTE: Red /Yellow LEDs, when lit, indicate errors or non-standard configuration for normal operation.
T1/PRI Board Indicators
Red Alarm (red LED)When this LED indicator is lit, the system cannot establish communications with
the...

DXOPT–SYN Board Indicators
PRI and SEC (green LEDs)ThePRIandSECLEDs on the DXOPT-SYN card light to indicate where the
receive clock reference is originating from—the primary or secondary DXPT1
board location. When two or more DXPT1 boards are installed, you make the
primary and secondary assignments via  jumpers on the the DXAUX board. If
only one DXPT1 board is installed, you can set the jumpers so that both LEDs
will light.
UNLOCKED (red LED)When lit, the Unlocked LED indicates either that the straps...

Viewing The Alarms And Indicators
T1PRI Board (In order From top to bottom)
LED*LabelError Or Status Condition When Led Is Lit
l(Status) Rapid flash = defective board
Steady on = board in wrong slot or board constraints violated
Off with repeated five second blink on = normal operation
(T1 trunk idle)
On with repeated five second blink off = normal operation
(T1 trunk busy)
lRed Communications with network cannot be established
(out-of-service)
¤Yellow Network unable to frame sync to DXP Plus
lSync...