ATT DEFINITY Communications System Generic 3 For Single-Carrier Cabinets Instructions Manual

							9-2 6Issue 1  September 1995  
Installation
Install q ueue warning indicator as follows:
1. Determine port assignment for queue warning indicator from Hunt 
Group Form:
2. Install patch cord /jumper wires at cross-c onnect field.
3. Mount indicator at specified location.
4. Connect a 2-pair line cord  (mo dular plug at one end) from the 
information outlet to the indicator. See Figure 9-3.
5. Connect red (R) and green (T) leads to the indicator.
6. Administer per 
DEFINITY Communications System Generic 3 V2 
Imp lementation
, 555-230-655.
Install the 1145B1 Power Supply
The 1145B1 closet power arrangement provides an uninterruptible -48VDC 
power source with battery and 1145B1 distribution unit for Integrated Services 
Digital Network (ISDN)/digital communications p rotocol terminal e quipment, 
terminal adjuncts, and other customer provided equipment. During AC power 
interruptions, batteries automatically provide continuous power to the load.
During normal operation, the power supply/charger provides DC power to the 
load via the distribution unit while maintaining the battery in a fully charged 
condition. A manual switch on the distribution unit allows the user to redirect 
reserve power to outputs 1 through 8 or 1 through 32, 
with the switch set to the 1 
through 32 setting, all outp uts will be p rovid e d battery reserve power.
The 1145B1/1146B1 is a -48V power supply with 200 watt total output. This unit 
is a 110-type distribution unit with 32 output circuits. Each output is current 
limited by a positive temp erature coefficient thermistor (PTC). The thermistor 
limits the maximum output to 12 watts and prevents excessive current from 
causing hazards. If the thermistor is current limiting, there is a short across the 
power pair. Each 1145B1 output has an individual light emitting diode to 
indicate the status of the thermistor. If the light emitting diod e is on, the 
thermistor has a short on that p ower pair.
Not all outputs can simultaneously provide 12 watts. The average power per 
output cannot exceed 6.25 watts (200/32 =  6.25). 
The 1145B1 is designed to 
power one integrated services d igital network terminal or d i gital c ommunications 
protocol adjunct per output. The maximum number of terminals or adjuncts is 
EXAMPLE:   Port Numb er 2 B 02 01
Cabinet CarrierSlot Circuit 
						

							Install the 1145B1 Power Sup p ly
Issue 1  September 1995 
9-2 7
32. The 1145B1 (not 1145A1) is required for installation outside the United 
States.
Auxiliary power (local or bulk) is always required in the following situations:
nAttendant console 302B.
nAny 8520 terminal.
nAny 7500-series or 8500-series terminal with an asynchronous data 
module.
nAny 7500-series terminal (whether in p assive b us, or p oint to point, that is, 
one per basic rate interface port).
nAny 8510 terminal in p assive b us or with an asynchronous data module. 
(Provide auxiliary power to an 8510 unless you are certain it will never be 
used to support such applications as d ata or video.)
This section tells how to install the 1145B1 Power Su p ply, 1146B1 Power 
Distribution Unit, and 2.5 amp hour (AH) back-up batteries. All units are mounte d 
on wall-mounting plates. The wall-mounting plates should be installed first. The 
rest of the hardware can be mounte d in any desired order. The next illustration 
shows how the power supply and wall-mounting plates fit together.
Wall-Mounting Plates
Two wall mounting plates are provided for easy assembly and to provide correct 
spacing between units for cooling. The  top  plate  is  needed for  mounting the 
back-up battery. The bottom plate is need e d to mount the Power Supply and 
Distribution Units. The p lates can also b e used for rack mounting the hardware 
by means of standard rack-mounting brackets.
1. Locate one p late d irectly below the other one such that the AC power 
cord (6-1/2 feet or 2 meters) reaches the desired electrical outlet from a 
power supply mounted on the b ottom plate. Both plates should be 
located so the raised letters are right side up.
NOTE:
A maximum of four Power Su p plies can be powered from one 
dedicated 110VAC, 20 amp (or 230VAC, 15A) feeder. Use only 
unswitched receptacles. In other words, receptacles not connected 
to a wall switch.
2. Secure the wall mounting plates to a standard 3/4 inch (2 c m) thick 
plywood mounting board. Each mounting plate comes with four 
#10x1/2-inch wood sc rews. 
						

							9-2 8Issue 1  September 1995  
Figure 9-12. 1145B1/1146B1 Mounting Arrangement
2
9
1-8
1-32
3
5
87
Output Power On Charging Battery On Battery Reserve1145A1 Power Unit4
61 1
10
1. Wall mounting plate
2. 2.5 Amp Hour Battery
3. Battery bracket
4. AC power cord
5. 1146B power distribution unit
6. Unswitched outlet 120 VAC, 20 Amp or 
230 VAC, 15 Amp )7. 11 45 B P owe r S u p p ly
8. Power cable
9. Battery backup switch settings
10 . In set
nWall must be at least 3/4” (1.9 cm) wood
Figure Notes: 
						

							Install the 1145B1 Power Sup p ly
Issue 1  September 1995 
9-2 9
Mount the 1145B1 Power Supply
The 1145B1 Power Supply unit is snap-fitted onto the bottom wall mounting p late 
without tools.
1. Perform this ste p using a place, rotate, then snap motion. The holes 
used for 1145B1 Power Supply mounting are indicated on the wall-
mounting plate. The preceding illustration shows a side view of the 
mounting arrangement.
To dismount the unit, push the bottom of the power unit toward the 
mounting p late while pressing the two snaps on the bottom. Rotate 
upward  and lower the unit.
Figure 9-13. Side View of 1145B1 Power Supply Mounting
1
9
6
8
2
3
4
5
7
1. 3/4 inch (2  cm) Plywoo d
2. A C Re c e pta c l e
3. 114 5B 1 Powe r Un it
4. Frame Ground
5. 16 AWG Installer Wiring6. Snap
7. To Approved Ground
8. Wall  Mountin g Plate
9. Power Cord Snap-in Clips
Figure Notes: 
						

							9-3 0Issue 1  September 1995  
2. An installer-provided insulated ground wire, 16 AWG or greater, is 
required to c onnect the Power Supply frame ground lug to an approved 
ground. The Power Supply frame ground sc rew is located next to the 
AC receptacle to the left of the unit. The ground screw and the AC 
receptacle are shown in the preceding illustration.
3. Mark the Unit Number and Connectivity information on the front label 
next to the light emitting diodes.
Mount the 1146B1 Power Distribution Unit
The Power Distribution Unit is mounted onto the bottom wall mounting plate with 
three screws.
1. Insert and securely tighten the two #8-32x1/2-inch shoulder sc rews 
(they have an unthreaded section at the top) into the top holes 
designated for 1146B1 Power Distribution Unit on the wall mounting 
p late. Mount the unit on these two shoulder sc rews, using the key holes 
on the back of the unit. Secure the unit by inserting the #8-32x1-inch 
screw through the bottom of the unit (just a bove the wire clips) into the 
wall mounting  plate and tighten.
2. Select the d esired b attery back-up switch option. The switch is preset to 
1-32 (down p osition) option to provide battery back-up to all outputs. 
The u p position provides battery back-up to outputs 1-8 only.
3. Connect the Power Distribution Unit to the Power Sup p ly with the power 
cable. Bend and connect the cable. Refer to the Power Supply’s right-
hand label to locate the output power connection.
Battery Mounting/Wiring
The b a ck-up battery is placed in the battery bracket mounted onto the top wall-
mounting p late using the four #10-32x1/2-inch screws.
1. Insert (d o not tighten) two #10-32x1/2-inch screws into the top 
designated b attery bracket holes on the wall mounting p late.
2. Place the battery bracket on these two screws and tighten the screws.
3. Insert the remaining two #10-32x1/2-inch screws into the battery 
bracket bottom holes and tighten.
4. Place the battery in the bracket. The battery cord  exits from the right of 
the bracket. Make sure the label on the battery is visible.
5. Plug the battery cord into the Power Sup ply’s right rear receptacle. The 
rear receptacle is indicated on the Power Supply’s right label. 
						

							Install the 1145B1 Power Sup p ly
Issue 1  September 1995 
9-3 1
Power Up and Test
Powering up and testing should be performed only after all the hardware is 
properly mounte d. The following table describes the meaning of the Power 
Supply light emitting diodes when lit.
1. Connect the AC power cord to Power Supp ly and route the cord  to an 
appropriate AC outlet using the clips provided on the unit.
NOTE:
A maximum of four Power Su p plies can be powered from one 
dedicated 110VAC, 20A feeder. Use only unswitched receptacles.
2. Plug the cord  into the outlet. This powers up the Power Supply (no 
ON/OFF switch).
3. Check AC operation of the 1145B1 Power Sup p ly b y monitoring the light 
emitting diodes (LED):
PASS:  Green and yellow light emitting diod es (LED) at front of the unit 
should b e lit together. Green means the Power Su p ply is providing power. 
Yellow means the battery is being charged. After the b attery reaches full 
charge (maximum of twenty hours), the yellow light emitting diode (LED) 
should go out.
FAIL:  If either green or yellow light emitting diode (LED) is not lit after 
powering up, check the connections. Test the AC outlet. If p ower is 
available to the Power Unit and the AC power cord and connections are 
good, replace the power unit.
4. Disconnect the AC plug on the Power Su pply, this activates the DC 
supply.
5. Check DC (b attery back-up) operation of the 1145B1 Power Supply by 
monitoring the light emitting diodes (LED):
PASS:  The red and green light emitting diodes (LED) should be lit 
together. Red means the Power Su p ply is on battery back-up.
FAIL:  If either green or red light emitting diode (LED) is not lit after 
disconnecting AC power,  check the connections. If the connections are 
good, replace the power unit or batteries.
6. Reconnect AC power to the Power Supply. The  green and yellow light 
emitting diodes (LED) should light as described before. Light Emitting 
Diode Colour  Meaning
Green Power Supply is providing power
Yellow Battery is charging
Re d Power Supply is on battery reserve 
						

							9-3 2Issue 1  September 1995  
Wire the 1146B1 Power Distribution Unit
It may be better to wire endpoints to the 1146B1 while p ower from the 1145B1 is 
on. This way, a red light emitting diod e (LED) on the distribution unit lights if you 
connect its associated circuit to shorted building wiring or to a shorted terminal.
1. Install cross-connect jumpers to wire from the Distribution Unit (the label 
shows polarity) to Pins 7 and 8 of the appropriate information outlet. 
Route the wires through the clip provided on the unit. If a red light 
emitting diode (LED) is on, see the next section 
Reset light emitting 
d iodes (LED) on Power Distribution Unit
. The following illustration shows 
a typical connection.
2. Mark lead destination on the label next to each connector on the 
Distribution Unit. Also mark the Unit Numb er and Connectivity 
information on the label.
Figure 9-14. Typical Wiring to a Terminal
4
2 1
10
32 17
16
12
3 7
6
5
8
11
1
9 9
1. Alternating Current (AC)
2. Installer-provided ground wire
3. Circuits 1-32
4. Power supply kit
5. Battery 
6. 1145B1 Power Supply
7. 1146B1 Distribution Unit8. Private branch exchange Port Circuit
9. Tip and Ring
10. Pins 7 & 8
11. Cross-Connect
12. Integrated Services Digital Network 
(ISDN)/ Disp lay System Protocol (DSP) 
Terminal
Figure Notes: 
						

							Install the 1145B1 Power Sup p ly
Issue 1  September 1995 
9-3 3
Reset Light Emitting Diodes (LED) on Power 
Distribution Unit
A lit red light emitting  diod e (LED) next to any of the 32 p ower output connectors 
on the Power Distribution Unit indicates a short circuit in the building wiring or 
the terminal equipment. To reset the light emitting diode (LED), p erform the 
following:
1. Disconnect the terminal equipment from the wall jack.
2. If the light emitting diode (LED) g oes off, the terminal e quipment is faulty 
and must be replaced. If the light emitting diode (LED) is still lit, find and 
repair the short circuit in the building wiring.
3. Reconnect the terminal e quipment to the wall jack and re-test terminal 
equipment operation.
!WARNING:
Imp ortant Safety Instructions follow.
When operating this e quipment, basic safety precautions must be followed to 
reduce the risk of fire, electric shock and personal injury, including the following:
nRead and understand all instructions.
nDo not attach the power supply cord to building surfaces.
nFor continued b ack-up  protection and battery reliability, replace batteries 
every four years.
nFollow all warnings and instructions marked on the products.
nClean products only with a dry rag.
nDo not use this product near water.
nFor mounting  security, follow all installation instructions when mounting 
product.
nOpenings on top and bottom of power unit are provided for ventilation. Do 
not block or cover these openings. Do not exc eed recommended 
environmental temperatures.
nO perate these products only from the typ e of power source indicated on 
the product labels.
nThe power unit is equipped with a three wire grounding type plug; a plug 
having a third  (grounding) p in. This plug will only fit into a grounding type 
power outlet. This is a safety feature. If you are unable to insert the plug 
into the outlet, contact an electrician to replace the outlet. Do not defeat 
the safety purpose of the grounding typ e plug.
nDo not allow anything to rest on or sp ill into the products.
nTo reduce risk of fire and electrical shock, do not overload power outlets. 
						

							9-3 4Issue 1  September 1995  
nNever push objects of any kind through the power supply or distribution 
unit slots as they may touch dangerous voltage points or short out parts 
that could result in a risk of fire or electrical shock.
nTo reduce risk of electric shock, do not disassemble these products. 
Return them for repair when needed. Opening or removing covers may 
expose you to dangerous voltages or other risks. Incorrect reassembly 
can cause electric shock when the products are subsequently used.
nPower d own the power unit (see label on power unit on how to do this) 
and refer servicing under the following conditions:
— if liquid has been spilled into any of the p roducts
— if any of the products have been exposed to water
— if any of the products do not operate normally
— if any of the products have been drop ped or damaged
— if any of the products exhibits a change in performance.
nDo not attempt to recharge batteries on your own. The batteries may leak 
corrosive electrolyte or explode. The  1145B1 power unit recharges the 
batteries safely.
nRemove the batteries if the p ower unit will not be used for a long period of 
time (several months or more) since during this time the battery may leak.
nDiscard d ischarged batteries as soon as possible. Discharged batteries 
are more likely to leak.
nDo not store batteries in high temperature areas. Batteries stored in a 
cold environment should be protected from condensation during storage 
and warming. Batteries should be stabilized at room temp erature prior to 
use after cold storage. Do not install batteries if the manufacturing date 
on the label indicates that the batteries are more than six months old.
Install the MSP-1 Power Supply
Underwriter’s Laboratories (UL) Information
The MSP-1 Power Su p ply has been tested and found to comply with the 
Underwriters Laboratories (UL) Standard Underwriter’s Laboratories 1459, 
second edition. This standard  requires that you be advised of certain safety 
instructions regarding the use of the power supply. These safety instructions 
follow the table of certifications.
Complies Underwriter’s Laboratories (UL) 1459
Certified Canadian Safety Association (CSA) 22.2
Approved IEC 950 
						

							Install the MSP-1 Power Sup p ly
Issue 1  September 1995 
9-3 5
Important Safety Instructions
The most careful attention has been devoted to safety standards in the 
manufacture of this power sup ply. Safety is a major factor in the design of every 
power supply. But, safety is 
your responsibility too.
Please read carefully the helpful tips listed  below and on the next p a ge. These 
suggestions will enable you to take full advantage of this product. Then, retain 
these tips for later use.
!CAUTION:
When using this power supply, the following safety precautions should 
always be followed to reduce the risk of fire, electric shock, and injury to 
persons.
nRead and understand all instructions.
nFollow all warnings and instructions marked on this power supply.
nThis product can cause dangerous shock if immersed in water. To avoid 
the possibility of electrical shock, do not use near water.
nTo reduce the risk of electric shock, do not disassemble this product. 
There are no user serviceable parts inside.
nThis product should be operated only from the type of AC power source 
indicated on the label. If you are not sure of the type of AC p ower being 
provided, contact a qualified service person.
nDo not allow anything to rest on the power cord. Do not locate this 
product where the cord will be abused b y persons walking on it.
nDo not overload wall outlets and extension cords, as this can result in the 
risk of line or electric shock.
nDisconnect the cords on this product and refer servicing to qualified 
service personnel under the following conditions:
— When the power supply cord or plug is damaged or frayed.
— If liquid has been spilled into the product.
— If the product has been exposed to rain or water.
— If the product does not o perate normally by following the operating 
instructions.
— If the product has been dropped or the housing has been 
damaged.
— If the product exhibits a distinct change in performance.