Comdial Dxp Plus Instructions Manual

T1002f.cdr
Reset Pushbutton
(Behind Hole)
LIU
SW1
0011
(Default)
1
2
3
4(Default)
1
2
3
4
5
6
7
8
See Text
For Settings
01SW2
(Default)
1
2
3
4
5
6
7
8
See Text
For Settings See Text
For Settings
Diagnostic
Switches and LEDs
(Default)
1
2
3
4
5
6
7
8
See Text
For Settings
0101
01
Setting The DIP Switches
Installing And Programming The DXPRI Card IMI89–255
Configuring The T1/PRI Board – 5 

Setting The T1/PRI Switches
NOTE: The system only reads the SW2 and LIU DIP switches when you apply power to the board or do a manual
reset. With power on, manually reset the board by inserting a slender object, such as a straightened-out
paper clip, into the small hole located between the Yellow and Syn LEDs on the front-edge panel. You can
also reset the board remotely from a video display terminal or personal computer. A reset causes a service
disruption.
Setting Switch Options SW1–1 Through SW1–8...

Setting Switch Options LIU–1 Through LIU–4
Receive Sensitivity
The equalizer gain logic (EGL) determines how sensitive the receive circuits are to the incoming signals. You set
the level for -26 dB or -36 dB by using DIP switch LIU–1. (Normally, the -26 dB level setting is the better choice.)
Transmit Level Attenuation
You can manually set the transmit level for a particular value (0, -7.5, -15, or -22.5 dB) or select the automatic
feature that sets the transmit level automatically depending on the...

Setting Switch Options SW2–1 Through SW2–8
Loop-back
Loop-back is the maintenance routine used to verify the receive function (local or remote) and to isolate system
problems. The network can remotely activate the loop-back feature using ESF (ANSI T1.403) facility data link.
You can manually make three different types of loop-back requests depending on the option you select using DIP
switches SW2–7 and SW2–8. These are: local, remote, and payload loop-back.
·Local loop-back returns transmitted signals...

SW2 DIP
Switch
NumberSwitch Position Function
1 (top)
0 (default)
1Reserved for future use.
reserved
reserved
2
0 (default)
1CSU ID (C/R) BIT (ESF MODE)
C/R bit = 0 designates customer premise equipment (CPE)
C/R bit = 1 designates carrier equipment
3
0 (default)
1Reserved for future use.
reserved
reserved
4
0 (default)
1CRC (CYCLIC REDUNDANCY CHECK)
disabled
enabled
5
0 (default)
1FDL YELLOW ALARM DURING ANSI MESSAGES
disabled
enabled
6
0 (default)
1B8ZS/COFA LED DEFINITION
COFA (change of frame...

Installing The Synchronization Card On The Services Board
Whenever you install one or more T1/PRI boards, and the DXPPlusis receiving its timing signals from an
external source, you must install one synchronization card (DXOPT–SYN) on the services board using the
following procedure.
NOTE: Whenever you install one or more T1/PRI boards, and the DXP Plus is receiving its timing signals from
an external source, you must install one synchronization card (DXOPT–SYN) on the services board. When
you connect...

Synchronization Board
Services Board
PLUS008
Installing The Synchronization Card On The Services Board
Installing And Programming The DXPRI Card IMI89–255
Installing The Synchronization Card On The Services Board – 11 

Configuring The Services and Interface Boards
The DXPPlusextracts clocking information from the central office (CO) that supplies the ISDN–PRI lines, and
routes this information to the DXOPT–SYN card. The sync card uses this clocking information to derive the
synchronizing signal for the T1/PRI board’s transmit clock signal. Therefore, the T1/PRI board’s transmit clock is
slaved to the CO supplying the ISDN–PRI lines. If there is only one CO supplier, that source is the primary clock
source; however, if...

Summarizing The Services Board And Expansion Interface Board Strapping
DXPT1 Cabinet LocationServices Board Strap
PRIMARY or SECONDARY*Expansion Cabinet Interface Board
Switch Setting SWA or SWB**
Main –UNV1 A Not Applicable
Main–UNV2 B
Main–UNV3 C
Main–UNV4 D
Main–UNV5 E
Main–UNV6 F
Main–UNV7 G
Main–UNV8 H
Main–UNV9 I
Upper Expansion–UNV1 J or K 1
Upper Expansion–UNV2 J or K 2
Upper Expansion–UNV3 J or K 3
Upper Expansion–UNV4 J or K 4
Upper Expansion–UNV5 J or K 5
Upper Expansion–UNV6 J or K 6
Upper...

Setting The Services Board And Expansion Interface Board Strapping
Configure the services and interface boards by performing the steps in the following process.
1. Install your static discharge wrist strap on your bare wrist; adjust it for a snug fit. Be sure that the strap is
touching bare skin and is not isolated by clothing. Connect the wrist strap cord between the wrist strap and an
AC or earth ground
NOTE: With the common equipment in the installed position, the ground lug on the side of the cabinet...