Comdial Dsu II Installation Manual

							Installing The DSU II Digital
Telephone System
SectionTitle ...........................................................................................................Page
2.1 Considering the Mounting Requirements................................................2–4
2.1.1 Tools And Hardware ..............................................................................2–5
2.1.2 Underwriters Laboratories Installation Notice .......................................2–5
2.1.3 Hybrid Installation ..................................................................................2–5
2.2 Mounting The Cabinet...............................................................................2–6
2.3 Making The AC Power Connection .........................................................2–8
2.3.1 Identifying The Fuses .............................................................................2–8
2.3.2 Grounding The System .........................................................................2–10
2.4 Connecting The Lines ..............................................................................2–12
2.4.1 Detailing The Line Connections .......................................................... 2–14
2.4.2 Reassigning The Line Ports ..................................................................2–14
2.4.3 Protecting The Lines .............................................................................2–14
2.5 Connecting The Stations..........................................................................2–16
2.5.1 Grounding The Unused Station Cables ................................................2–17
2.5.2 Relocating The Stations ........................................................................2–17
2.5.3 Installing The Cable Clips ....................................................................2–17
2.5.4 Connecting Stations To The J0408 ...................................................... 2–19
2.5.5 Connecting Stations To The J0816 ...................................................... 2–20
2.5.6 Connecting Stations To The J1632 ...................................................... 2–21
2.5.7 Wall Mounting The Telephone Stations ...............................................2–23
2
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 1 
						

							SectionTitle ...........................................................................................................Page
2.6 Installing DSS/BLF Consoles ..................................................................2–26
2.7 Connecting A Power Failure Station......................................................2–28
2.8 Using The Auxiliary Equipment Interface ............................................2–29
2.9 Common The Audible And Auxiliary Ringing Interface .....................2–30
2.9.1 Connecting Outside Lines ....................................................................2–30
2.9.2 Connecting Selected Ports ....................................................................2–30
2.10 Using The External Paging Interface .....................................................2–32
2.11 Using A Line Port As An External Paging Interface ............................2–33
2.12 Connecting Data Devices To The System ..............................................2–34
2.12.1 Making Modular Jack Data Connections .............................................2–34
2.12.2 Making The Common Equipment Data Connections.......................... 2–36
2.12.3 Connecting A Personal Computer For Remote Programming .............2–38
2.13 Using The Music Interface ......................................................................2–40
2.14 Using The Add-On Expansion Module ..................................................2–41
2.14.1 Using The JM408 Module ....................................................................2–41
2.14.2 Using The JM008 Module ................................................................... 2–44
2.14.3 Installing An Add-On Expansion Module ........................................... 2–48
2.15 Checking The System Installation ..........................................................2–50
2.15.1 Checking The Resistance......................................................................2–50
2.15.2 Checking The Voltage ..........................................................................2–50
2.15.3 Checking The General Operating Conditions ..................................... 2–51
IMI66–132 DSU II Digital Telephone System
2 – 2 Installing The DSU II Digital Telephone System 
						

							SectionTitle ...........................................................................................................Page
2.16 Isolating Failures ......................................................................................2–51
2.16.1 Checking The System Status Indicator .................................................2–51
2.16.2 Testing The Stations .............................................................................2–51
2.17 Loading And Up-Grading The System Software ..................................2–52
2.17.1 Introducing The Software Key .............................................................2–52
2.17.2 Introducing The Software Disks ...........................................................2–53
2.17.3 Loading The Software ..........................................................................2–54
2.18 Installing The System Options And Accessories .................................. 2–60
2.18.1 Installing The Battery Back Up Assembly .......................................... 2–60
2.18.2 Installing the Analog Terminal Interface............................................. 2–64
2.18.3 Installing the Data Interface Unit .........................................................2–72
2.18.4 Supporting Caller Identification Service ..............................................2–76
2.18.5 Supporting The Tracker Paging System ...............................................2–80
2.18.6 Supporting DVA Operation ..................................................................2–82
2.18.7 Installing The Personal Computer Interface Unit ................................. 2-84
2.18.8 Connecting The Versatile Voice Processing Voice Mail System ........2–86
2.19 FCC Rules And Regulations .................................................................. 2–88
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 3 
						

							2.1 Considering The Mounting Requirements
The following requirements will help you to install the DSU II digital telephone system.
·Locate the equipment cabinet within four feet of an AC electrical outlet dedicated
exclusively to the use of this equipment. The outlet must be a 117 VAC 15 AMP circuit
with a third-wire ground supplied to a standard electrical outlet (NEMA 5–15R).
·Mount the common equipment within 25 feet of the TELCO/PBX jacks. The recommended
nominal distance is 7 feet.
·Choose a secure and dry mounting location that has adequate ventilation. The temperature
range of the location must be within 32–122 degrees F (0–50 degrees C) and that the
relative humidity is less than 90 percent, non-condensing.
·If the mounting surface is damp or if it is made of concrete or masonry material, you must
attach a backboard to the mounting surface for mounting the common equipment. Suitable
mounting backboards are available commercially or you can construct one from 3/4-inch
plywood by cutting it to size.
IMI66–132 DSU II Digital Telephone System
2 – 4 Installing The DSU II Digital Telephone System 
						

							2.1.1 Tools And Hardware
You will need the following tools and materials to install the common equipment.
·Fasteners—wood screws (1/4 x 1-inch round head), toggle bolts, or wall anchors,
·Screwdriver—to match fasteners,
·Electric drill—if prepared holes are required,
·Connecting tool—for fastening wires to a type-66 connector block,
·Crimping tool—for 623-type modular plugs,
·Volt/Ohm Meter.
2.1.2 Underwriters Laboratories Installation Notice
Per The Underwriters Laboratories standard 1459, 2nd edition, be aware of the following
precautions when installing telephone equipment that is to be directly connected to the telephone
company network:
·Never install telephone wiring during a lightning storm,
·Never install telephone jacks in wet locations unless the jack is specifically designed for
wet locations,
·Never touch un-insulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface,
·Use caution when installing or modifying telephone lines.
2.1.3 Hybrid Installation
Whenever a programmer assigns lines to line groups, the digital telephone system automatically
assumes the hybrid mode. Your local telephone company may charge a higher monthly fee for
operation of a hybrid system; therefore, the FCC requires that you report the equipment-type
category designation number (KF for key system, MF for hybrid system) to the telephone
company at the time of installation.
FCC Registration Numbers
Key SystemCVWUSA-61535-KF-E
Hybrid SystemCVWUSA-61536-MF-E
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 5 
						

							2.2 Mounting The Cabinet
After thoroughly reviewing Section 2.1 and fully understanding its subject matter, use the
following procedure to mount the common equipment cabinet
1. Unpack and carefully inspect all equipment for shipping damage. Notify the shipper
immediately of any damages that you find.  Verify that the packages contain all parts and
accessories needed for proper installation and operation.
2. If the mounting location requires a backboard, attach it securely to provide a stable mounting
surface for the equipment.
3. Refer to Figure 2-1 or to the PP032-001 mounting template included in the literature that
accompanies the common equipment cabinet for the locating dimensions required for the
three mounting screws, and mark their locations on the mounting surface.
4. Drill holes in the mounting surface of a proper size to accommodate the hardware being
used. If necessary, prepare these holes with inserts, anchors or other attachment devices as
dictated by the type of mounting surface.
5. Insert the two top screws into the mounting surface and tighten them to within approximately
1/8-inch of the surface.
6. Hang the cabinet on the top screws using the mounting holes located on the rear of the
cabinet. Note that these holes are elongated with an enlargement at one end. This feature
allows the cabinet to snap down on the screws to secure the mounting when the cabinet is
hung on them.
7. Insert a third screw through the mounting tab located on the lower edge of the cabinet and
into the mounting surface, and tighten it into place.
8. Place the individual telephone stations as desired and in keeping with accepted industry and
office standards. You can wall mount a telephone station if necessary (see Section 2.5.7 for
details).
IMI66–132 DSU II Digital Telephone System
2 – 6 Installing The DSU II Digital Telephone System 
						

							DSU250.CDR
4.54
3.78
3.78
16.50
16.50
16.50
27.58
27.5821.30
0.88 0.87
26.65 26.25 20.50
Back of
16-Line, 32-Station
Base UnitBack of
8-Line, 16-Station
Base Unit
Back of
4-Line, 8-Station
Base Unit
4-Line, 8-Station Base Unit
8-Line, 16-Station Base Unit
16-Line, 32-Station Base Unit
0.88
Detailing The DSU II Cabinet Dimensions
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 7 
						

							2.3 Making The AC Power Connection
You must employ a dedicated 117VAC 15 AMP circuit, with a third-wire ground, supplied to a
standard electrical outlet (NEMA 5-15R) for the AC power connection.
·For added equipment protection, connect a plug-in power line surge protector between the
power cord and the AC outlet.
·Thoroughly check out the installation before connecting the power cord to an electrical
outlet to apply AC power to the system.
2.3.1 Identifying The Fuses
The system is protected against short circuit damage by a fuse located on the right side of the
common equipment cabinet. Always replace the fuse with one of the same value and type;
otherwise, equipment damage could result.
Comparing Cabinets And Their Fuse Types
Cabinet Fuse Value
J0408 1A 250V slow-blow type
J0816 3A 250V slow-blow type
J1632 3A 250V slow-blow type
IMI66–132 DSU II Digital Telephone System
2 – 8 Installing The DSU II Digital Telephone System 
						

							Typical
earth
groundGrounding
terminalPlug-in power
line surge
protector (typical) Dedicated 117VAC
15 AMP NEMA 5-15R
electrical outlet
with third-wire ground
Fuse
(See text)
DSU211
Making The AC Power Connections
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 9 
						

							2.3.2 Grounding The System
If spare conductors exist in the cables between the station and the 66M-xx connector blocks, it is
good practice to connect them to an earth ground. Doing this may help prevent them from
inducing radio frequency and/or AC interference into the system. It is also good practice to
disconnect any unused station jacks from the connector block and ground that wiring to an earth
ground as well.
Transient voltage spikes, if induced onto CO or CENTREX lines, can travel through the cable
and into the common equipment. The telephone company offers basic protection against this
condition but it is usually designed to protect the central office circuits. While it will also
provide some protection to the common equipment, you should not rely upon it for total
protection. To help ensure that external over-voltage surges do not damage the system, you
should install and properly ground primary protection devices, such as gas discharge tubes or
similar devices, on all lines. While the line boards have internal secondary surge protection on
all line ports, in order for this protection to be effective, youMUSTconnect the common
equipment cabinet to a reliable, effective earth ground.
Proper DSU grounding is necessary for trouble-free operation and personnel safety. The DSU
has the following three types of grounds:
·
Service Ground—a neutral power line wire that is connected to the ground bus in the
premises’ AC power panel,
·
System Ground—a non-current carrying power line wire that is connected to the ground bus
in the premises’ AC power panel,
·
Frame Ground—a low impedance conductor that places the common equipment cabinet at
reference ground potential. The frame ground provides the greatest safety by limiting
electrical potential between non-current carrying parts of the system. The common
equipment cabinet provides a ground stud on its cabinet for access to its frame ground.
Effective grounding requires that you connect the frame ground to a good earth ground. A good
earth ground is one such as the ground bus in the premises’ AC power panel or a public metallic
cold water pipe at a point immediately at its entrance to the premises and ahead of any meters,
pumps, or insulating sections that have been added for vibration reduction. Avoid using the
premises’ structural steel frame as it may not be at earth ground potential. Make the ground
connection with #10 or #12 insulated, solid copper grounding wire.Keep the ground wire
separate from the three-wire AC line cord ground, do not splice it, and keep it as short as
possible.
The impedance of the wiring between the common equipment cabinet and the earth ground must
not exceed 0.25 ohms and the impedance between the earth ground and the power company’s
reference standard ground must not exceed 4 ohms. Use an acceptable low impedance measuring
device to measure the impedance of these paths. The #10 or #12 wire size will minimize the
wiring impedance; however, if the impedance between earth ground and the power company’s
standard reference ground exceeds 5 ohms, contact the local power company. The ground path
must always be of sufficient current-carrying capacity to prevent a build up of voltages that may
result in circuit noise, hazard to personnel, or equipment damage.
IMI66–132 DSU II Digital Telephone System
2 – 10  Installing The DSU II Digital Telephone System