Comdial Impact Dsu Instructions Manual

							Figure 2–28: Detailing The ATI-D Dimensions
IMI66–107Digital Telephone System
Installing The DSU 2 – 61 
						

							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.)
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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							Figure 2–29: Interconnecting The ATI-D
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
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CLIP TERMINALS
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Typical Station
Connector Block
ATI-D
Common
Equipment
Jack
Line Jack
Connect to Station Connector Jack
AT I 3
On-Permise IST Jacks 1 and 2
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Installing The DSU 2 – 63 
						

							Installing An OPX Long Loop Adapter For Off-Premise Service
As stated previously, the analog terminal interface is an on-premise device. You must use an
OPX long loop adapter if you wish to adapt the ATI-D to support an off-premise application. An
OPX long loop adapter connects to a single telephone line and can greatly extend the line’s loop
length (the Proctor Model 46222 adapter*, for example, can extend line length to 30,000 feet).
*Proctor & Associates Company, Redmond WA
CAUTION
When you connect an adapter to an off-premise extension (OPX), you must install primary
protectors in series with the tip/ring pair of the telephone line that is routed to the OPX. This
action is necessary to protect both the user and the equipment from transient voltage spikes
that can travel through the cable. The telephone company offers basic protection against this
condition; however, that protection is usually designed to safeguard the central office circuits
and you cannot rely upon it to protect common equipment. To help insure that external
overvoltage surges do not damage the system, installation specialists recommend that you
install and properly ground gas discharge tubes or similar primary protection devices on the
telephone line that routes between the adapter and the OPX.
To install the OPX long loop adapter:
·Follow manufacturer’s instructions for unpacking, inspecting, mounting and wiring the
adapter unit.
·Plug a modular cable into the system jack on the adapter and connect the opposite end of
the cable to the IST jack on the ATI-D.
·Plug a modular cord into the telephone jack on the adapter and connect the opposite end of
the cord to the OPX line (see Figure 4).
·Plug the adapter power cord into a standard 117 VAC, 3-wire electrical outlet.
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							Figure 2–30: Installing The Long Loop Adapter
Earth
Ground
(Optional)
1
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CLIP TERMINALS
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1 25
Typical Station
Connector Block
ATI-D
Common
Equipment
Jack
IST Jack
Off-Premise IST Jack
OPX
Long Loop
AdapterOn-Premise IST Jack
Connect to station connector
jack on common equipment.
CAJS106
11 7 VA C
4
43
32
25
5
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Installing The DSU 2 – 65 
						

							Understanding The Programming Requirements
The ATI-D provides the interfacing capability required to connect most IST equipment to a
station port of an digital telephone system.
The IST provides basic intercom service coupled with the ability to access outside lines.
Through programming, the IST acts as either as an intercom-only telephone or as a full-featured
business telephone. You can program the station port through which the IST is being interfaced
either for prime intercom or for prime line automatic and idle line preference. Default is for
prime intercom.  You can also program the station port for outside line ringing and to match the
type of dialing method employed by the IST.
Prime Intercom
On key configured systems, telephone users can extend line access to the IST for call
origination through the use of the call transfer feature. Through programming, you can assign
outside line ringing to the IST even though it is programmed for prime intercom access. To do
this, program the station port for the ringing line preference feature and enable ringing for all
desired lines.
On hybrid configured systems, the system gives the IST access to outside lines through line
group access. With line group access, IST users dial the group access code over the intercom line
to access an outside line for use. The common equipment then selects one of the grouped idle
lines for use in the order from the highest numbered line to the lowest numbered line.
Prime Line Automatic Or Idle Line Preference
Program an outside line as a prime line at the station port through which the IST is being
interfaced, or program the station port for idle line preference and then program one of the
assigned idle lines as a prime line.
With both prime line automatic and idle line preference features, the IST has outside line dial
tone when the user lifts the handset. Through programming, you can assign outside line ringing
to the IST station port that you have programmed for prime line automatic or for idle line
preference. Alternately, you can enable the ringing line preference feature for the station port.
The intercom line is available to an IST even though you have arranged it to have outside line
access. After going off-hook, the IST user obtains intercom dial tone by performing a hookflash.
To perform a hookflash, he or she must press and release the hookswitch. This action either
drops the outside line (if no digits are dialed after lifting the handset) or places it on hold (if
digits were dialed) and provides intercom dial tone.
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							ATI-D Distinctive Ringing
Intercom calls that ring at equipment connected through an ATI-D have a different cadence than
outside calls. Intercom ring cadence is: 1 sec. on, .5 sec. off, 1 sec. on, 3.5 sec. off. Outside call
ring cadence is: 2 sec. on, 4 sec. off. You can program disable this distinctive ringing feature to
make the intercom ring cadence the same as that for outside calls.
Through Dialing
You can program the station port that interfaces the IST for through-dialing if you wish or you
can disable this feature. The system automatically enables this feature when you connect the
ATI-D to the station port. If the IST is a dual-tone multi-frequency (DTMF) tone dial device,
dialing tones generated by it pass through the ATI-D, the common equipment and onto a tone
dial compatible telephone line. In this case, the station port must have through-dialing enabled.
However, if you use a rotary telephone as an IST device, you must disable through-dialing.
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							2.18.3 Installing The Data Interface Unit
Unpack the Data Interface Unit (DIU) and check for the following parts:
·Telephone line cord
·Power cable with attached transformer.
Verify that the Digital Service Unit (DSU) contains software revision 17A or later. If you need
to upgrade the DSU software, see the section entitled “Software Cartridge.”
Installing The Mechanical Components
You can install the DIU in either a free-standing manner or you can mount it on a wall.
When mounting the DIU on a wall:
1. Select a location that is close to a standard 115 VAC electrical wall outlet. The location you
select should also be convenient to the digital telephone and the Industry Standard Telephone
(IST), FAX, or modem—whichever one you will be connecting to the DIU.
2. Once you have selected the location for mounting the DIU, mark two locations for the
mounting screws as follows:
a. make the first mark,
b. measure 3 13/16 inches horizontally from the first mark and make the second mark.
Figure 2–31: Mounting Dimensions
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							3. Install two #8 X 3/4-inch screws in the wall at the locations you marked in step 2. Tighten
the screws until the screw heads are 1/4-inch from the surface of the wall.
4. Place the DIU on the wall with the screw heads inserted into the slots provided on the bottom
surface of the DIU. Slide the DIU onto the screw heads until it is firmly attached to the
screws.
Figure 2–32: Installing The Mounting Screws
IMI66–107Digital Telephone System
Installing The DSU 2 – 69 
						

							Making The Cable Connections
Four cable connections are required to the DIU—station line cord, digital telephone line cord,
IST/FAX/MODEM line cord, and power cable.
1. Disconnect the line cord on the digital telephone from the digital station port connector and
plug it into the connector labeled PHONE on the DIU.
2. Plug the line cord from the IST device you are installing with the DIU (such as a FAX
machine, or modem) into the DIU connector labeled FAX/MODEM.
3. Plug the transformer attached to one end of the power cable into a 115 VAC electrical wall
outlet. Connect the other end of the power cable into the DIU connector labeled POWER.
The green LED on the DIU will be on to indicate power is being supplied to the DIU.
4. Plug one end of a standard line cord into the connector labeled LINE on the DIU. Plug the
other end of the line cord into the digital station port connector.
NOTE: DIU power loss will create the same symptoms as the disconnection of the DIU from
the digital telephone system. If this occurs, plug the multiline digital telephone
directly into a digital station port connector.
Preparing The DSU For DIU Operation
Once you have verified that the system contains the correct software, you must program the
system for DIU operation. See Chapter 4, “System Programming” for programming details.
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