Comdial Dsu II Digital Telephone System Instructions Manual

							2.18 Installing The System Options And Accessories
This section contains information on installing the battery back up, the analog terminal interface,
and the data interface unit.
2.18.1 Installing The Battery Back Up Assembly
Preparing The Battery Back Up Assembly For Use
The factory ships the battery back up assembly with the harness installed in the enclosure. To
complete the assembly, perform the following operations:
·remove the lid from the metal enclosure and save the retaining hardware,
·install the batteries in the metal enclosure and connect the wiring per the schematic shown
below,
·replace the lid.
You can wall mount the battery back up enclosure if you wish. If you do, follow the same
guidelines and instructions for mounting the common equipment cabinet as set forth at the
beginning of this chapter.
batt3.cdr
Wiring The Batteries
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							batt1.cdr
Installing The Batteries
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							Connecting The Battery Back Up Assembly
The common equipment provides an interface connector for the connection of an optional
external battery assembly.
CAUTION
Be sure that the AC power cord is connected to the electrical outlet before connecting an
external battery assembly to the common equipment interface connector. This ensures that
internal protection circuitry is operating to prevent damage that could result from improper
connection.
The external battery assembly provides a minimum of one hour of operation should the AC
power to the system be interrupted. The assembly has a 15 ampere-hour current rating and is
fused with the following value: 4A 250V 3AG type.
The external battery assembly may include batteries from either of the following suppliers:
·Model PS-12150 from Power-Sonic Corporation, Redwood City CA, 94032
·Model PE12V15 from GS PORTALAC, City Of Industry CA, 91748
The minimum battery backup time for a fully configured system can be calculated using the
formula:
Back Up Time (in hours) =K(15)
1 + [(0.1) (N)]
K (Constant) = 0.9 for J0408 with or without an expansion module
0.8 for J0816 with or without expansion modules
0.8 for J1632 with or without expansion modules
15 = ampere-hours
N = total number of stations
Example:
Assume that a J1632 system plus two JM408 modules are installed along with the optional
battery assembly to provide back-up power.
Back up time =(0.8) (15)
=12
= 2.1 Hours
1+[(0.1) (48)] 5.8
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							During AC operation, the common equipment provides recharging current to maintain the
voltage potential of the external battery assembly at an operational level. The charging circuit
may not provide an adequate charge if an installed battery assembly has a current rating of
greater than 40 ampere-hours. You should measure the battery assembly voltage every three
months.
For proper backup capabilities, make sure the batteries meet the following specifications:
·With a fully-charged battery assembly disconnected from the common equipment, the
measured voltage must be greater than 12 VDC but should not exceed 13.5 VDC.
·With a fully-charged battery assembly connected to the common equipment, the measured
voltage should be less than 13.8 VDC. If the voltage measures higher than this limit,
contact your Comdial Technical Services representative.
·The open output of the common equipment battery charger connection measures 13.6-13.8
VDC. If the charging voltage measures higher or lower than this range, contact your
Comdial Technical Services representative
·An optional external battery assembly requires approximately 10 hours to completely
re-charge to full potential after it has been completely discharged and, in some cases, when
initially installed.
Frame
Ground
StudPlug-in power
line surge
protector (typical) Dedicated 117VAC
15 AMP NEMA 5-15R
electrical outlet
with third-wire ground
DSU217
Typical
Earth
Ground
Optional External
Battery and
Cable AssemblyInterface Connector
(For Optional External Battery Assembly)
(R)(G)(W)(BK)
Connecting The Battery Back-Up Assembly
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							2.18.2 Installing The Analog Terminal Interface
Introducing The Analog Terminal Interface (ATI-D)
The ATI-D is a multipurpose,on-premiseaccessory for the DSU II digital telephone system.
It has dual circuits that provide the following features:
·INDUSTRY-STANDARD TELEPHONE (IST) INTERFACE-This feature adapts most
industry-standard telephone (IST) devices to the digital telephone system. The ATI-D will
accept both tone (DTMF) and pulse (rotary) dialing from these devices.
·SYSTEM INTERCONNECTION-This feature allows an installer to connect two digital
telephone systems to each other using two ATI-Ds andon-premisewiring.  When
interconnected, either telephone system treats the other telephone system as an IST device.
The two telephone systems are not integrated together and do not share features.
·MODEM ADAPTER-This feature allows the flow of switched data between a data source
and a data receiver through the digital telephone system.
·VOICE MAIL/ANSWERING MACHINE INTERFACE-This feature allows an installer to
connect voice mail systems and automated answering devices to the digital telephone
system.
CAUTION
The ATI-D by itself does not support any off-premise service. Never connect the ATI-D to a
telephone company-supplied line unless you have first installed an acceptable OPX long loop
adapter.
The ATI-D is housed in a self-contained metal enclosure that can be wall mounted if desired.
The ATI-D is powered by the digital telephone system through the station port connections and
employs an internal ringing generator to generate a ringing signal for an IST. Dual, high-quality,
low-loss, balanced, telephone transmission circuitry supports two IST inputs.
One 2-pair cable (four-wire) connects the ATI-D to two common equipment station ports. A
single pair of wires connects the external analog IST equipment to the ATI-D. Modular
connectors are provided to allow quick connections.
Each ATI-D circuit drives a load with a maximum ringer equivalence number (REN) of 2.0, thus
allowing more than one IST connection at each interface input. Check the REN number of the
connected IST equipment so as not to exceed the capacity of the ATI-D. Improper operation
may result if the REN maximum of the ATI-D is exceeded.
The ATI-D supports a wide variety of IST equipment such as 500 and 2500-type telephones,
cordless telephones, voice mail systems, answering machines, FAX machines, and data modems.
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							Detailing The The Analog Terminal Interface Specifications
Power requirements: Supplied by the common equipment
Ringing voltage: 55 VAC Nominal @ 20 Hz
(45 VAC minimum)
Power rated to maximum
REN = 2.0
Battery feed voltage: 24 VDC nominal
Loop current limits between ATI-D
and IST interface: 20 ma min. at 620 ohms
70 ma max. at 0 ohms
DC loop limits from ATI-D to
industry standard interface per port: 620 ohms maximum including interfaced telephony device.
(Approximately 4000 feet with #26 AWG twisted-pair cable
and 300 ohm device load.)
(Approximately 500 feet if two IST devices are connected in
parallel on same tip and ring pair.)
DC loop limits from ATI-D to voice
mail system: Approximately 1000 feet with #26 AWG twisted-pair cable.
Cable insulation resistance: 30,000 ohms minimum
Cable requirement ATI-D to system 2-pair twisted cable; 25 feet maximum length. (Both common
equipment station ports must always be connected to the
ATI-D for every installation, and they must be paired in
sequence - 12 & 13, 14 & 15, etc.)
Cable terminations: 623-type, 4-conductor mini jacks
Dialing: Industry-standard DTMF or Dial pulse (rotary) with nominal
make/break ratio of 40/60 @ 10 PPS
Ringing cadence: Outside calls = 2 second on -
4 seconds off
Intercom calls = Two bursts:
1 second on - .5 second off,
1 second on - 3.5 seconds off
Operating temperature: 32-122 F (0-50 C)
Humidity: 90 % relative, non-condensing
Height: 2.375 inches
Width: 8.062 inches
Length: 11.125 inches
Weight: 4 lbs. (plus 2 lbs.
for packing material)
FCC registered and listed for safety compliance as part of digital telephone system
FCC certified, Part 15 (class A)
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							Mounting The Analog Terminal Interface
Refer to Section 2.1 at the beginning of this chapter for system mounting considerations that are
also applicable to the analog terminal interface.
Mounting Procedure
1. Unpack and carefully inspect the ATI-D for shipping damage. Notify the shipper
immediately of any damage found. Verify that the package contains all parts and accessories
needed for proper installation and operation.
2. If a backboard is required at the mounting location, attach it securely to provide a stable
mounting surface.
3. Use the base of the ATI-D as a template or measure for mounting hole locations per the
dimension details shown in the illustration on the next page.
4. Drill holes of a proper size to accommodate the hardware being used into the mounting
surface. 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 ATI-D 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; tighten it into place.
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							10 15/16
2 3/8
7 3/16
11 3/16
5 5/8
11
Outline Dimensions
(In Inches)Spacing For
Mounting Hardware
(In Inches)
AW139
Detailing The ATI Dimensions
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							Connecting The Analog Terminal Interface
Connect the ATI-D per the diagram detailed on the following page. A grounding wire is not
required for operation; however, one is desirable for decreasing radio frequency interference and
electrostatic discharge susceptibility. The ATI-D housing provides a frame ground stud for this
purpose. Connect a #10 or #12, insulated, solid copper wire between this ground stud and a
reliable earth ground.
NOTE: You must connect both station ports to the ATI-D, even if you plan to use only one
IST device. Connect the first ATI-D port to an even station port. All ATI-D ports must
be paired.
CAUTION
Be careful when connecting the wiring between the common equipment and the ATI-D. Be
sure to connect the common equipment station ports to the COMMON EQUIPMENT (KSU)
jack on the ATI-D. Damage to the ATI-D could occur if this wiring is mistakenly connected to
the IST jack.
Use a voltmeter to check for the presence of voltage on the ATI-D IST jack.
1. Be sure that you have installed all the wiring between the ATI-D and the common equipment
station ports.
2. Measure for DC voltage on IST jack:
-Measure between TIP leads and common equipment grounding stud.
-Measure between RING leads and common equipment grounding stud.
-Measure between TIP leads and RING leads.
The measured voltage must be within following limits:
MEASUREMENT VOLTAGE
Tip to Ground +3 to +11 VDC
Ring to Ground -13 to -21 VDC
Tip to Ring +23 to +25 VDC
(The TIP lead is positive with respect to the RING lead.)
Understanding Analog Terminal Interface Programming Requirements
Once you have connected the ATI-D to the system there are several programming steps that you
should take to make it fully operational. Refer to Chapter 3, Section 3.10 for complete details.
Installing A Voice Mail Interface
You can use the ATI-D to provide interfacing for a customer-supplied voice processing system.
The ATI-D, using paired station ports (such as 12 and 13 or 14 and 15), will support two voice
mail ports.
To complete the installation, connect the voice mail ports to the IST jacks on the ATI-D.
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							Common Equipment Jack
PIN 1      No Connection
PIN 2      Odd Station (Tip)
PIN 3      Even Station (Tip)
PIN 4      Even Station (Ring)
PIN 5      Odd Station (Ring)
PIN 6      No Connection
Line Jack
PIN 1 No Connection
PIN 2 IST 2 (Tip)
PIN 3 IST 1 (Tip)
PIN 4 IST 1 (Ring)
PIN 5 IST 2 (Ring)
PIN 6 No Connection
6
5
4
321
PIN Locations On
Jacks - Front ViewEarth
Ground
(Optional)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
CLIP TERMINALS
50
26
1 25
Typical Station
Connector Block
ATI-D
Common
Equipment
Jack
Line Jack
Connect to Station Connector Jack
ATI3
On-Permise IST Jacks 1 and 2
Interconnecting The ATI-D
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