Comdial Dxp Plus Instructions Manual

3.6 Using The Modem
The modem is a general-purpose, *Hayes TM compatible, 300, 1200, and 2400 automatic baud detect
serial modem. The CPU board provides a dedicated serial data port and power port for the modem. If
you connect the modem to a serial data port on one of the communications cards, you will have to
program the system for modem operation on that port.
*Hayes is a registered trademark of Hayes Microcomputer Products.
SERIAL
Status
PWR
Line
PLUS013
Power
Cord
Serial Port
Cord
Figure 8: Modem...

3.7 Using The Ring Generator
The DXPPlusdigital communications system supports the use of industry-standard
telephones (IST).  To use ISTs, the system requires a ring generator assembly to supply ringing voltage
and message waiting voltage to the industry-standard telephones.
Regardless of the number of installed industry-standard telephones, you will need to install one ring
generator assembly in each common equipment cabinet that has IST telephones connected.
Power Supply
Assembly Ring Generator...

3.8 Understanding The Board Configuration
Physical vs.
Logical board
locationThe DXPPlususes two distinctions for station and line locations: the physical
location and the logical location.
Thephysical locationcorresponds to the order of the universal slots in the
system; these physical slot locations never change. There are a possible 30
physical slot locations in the DXP
Plus(nine slots in the main cabinet, eleven
slots in the upper expansion cabinet, and ten slots in the lower expansion
cabinet–see...

How automatic
configuration
worksBecause there are no dedicated station or line ports in the DXPPlus,the system
uses an automatic configuration method to number the lines and stations. When
you master clear the system, it automatically searches for all installed line and
station boards in the main and expansion cabinets. Once the system has identified
the board type and location, it automatically numbers the ports on every installed
board (see the section below, “How the system renumbers logical ports,”...

3.9 Mounting Considerations
When installing the DXPPlusdigital communications system, take note of the following requirements
(figure 11 shows the mounting dimensions):
NOTE: The following instructions describe how to mount the main cabinet using a backboard;
however, you can mount the cabinet on a standard 23–inch equipment rack if you wish.
·Always choose a secure and dry mounting location that has plenty of ventilation. Be sure that the
temperature range of the location is within 32-122 degrees F...

22 5/16
Expansion
Cabinet 1
Panel
Retaining
Screws
Panel
Retaining
Screws
Panel
Retaining
Screws Typical Backboard
48 X 96 3/4 Plywood Sheet
Main
Cabinet
Expansion
Cabinet 2 12 3/4
10 1/2
10 1/2
10 1/2
10 1/2
10 1/2
10 1/24 3/4
4 3/4 48
PLUS024
Figure 11: Mounting The Cabinets
DXP Plus General Description GCA40–130
Reviewing The Hardware – 23 

3.10 Using The Power Supply
What the power
supply doesEach cabinet in the DXPPlussystem has its own power supply. The power
supply provides + and – 5 VDC operating power for the circuit boards and – 36
VDC for all of the telephone stations. Each power supply is located in the top
right corner of the respective cabinet (see figure 12 for power supply locations).
Power supply
requirementsFor the AC power connection, employ a dedicated 117VAC 15 AMP circuit, with
a third-wire ground, supplied to a standard...

Plug-In
Power Line
Surge Protectors
Typical Earth
Ground Power
Cable
Two Dedicated
117 VAC 15 Amp
NEMA 5-15R
Electrical Outlets
With Third Wire
Ground
(Each Is Protected
By Its Own Circuit
Breaker.)
PLUS038
Two 15 AMP
Circuit Breakers
Ganged Together
Figure 12: Power Connections
DXP Plus General Description GCA40–130
Reviewing The Hardware – 25 

3.11 Using The Battery Backup
What the battery
backup doesShould the AC power to the system be interrupted, one external battery assembly
provides 1.0 hour of operation for a fully loaded system (for information on
battery backup time using expansion cabinets, see the section below,“How to
calculate battery backup time”).
During AC operation, the external battery assembly accepts re-charging current to
maintain the voltage potential of its batteries at an operational level. The
measured voltage the...

Figure 13: Battery Backup Connections
PLUS004
Circuit Breaker
Power Line
Surge Protector
Dedicated
AC Outlet
DXP Plus General Description GCA40–130
Reviewing The Hardware – 27