ATT DEFINITY Communications System Generic 3 Planning And Configuration Instructions Manual

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Single-Carrier Cabinet System
Each cabinet requires a separate DC power input.  See Table Q for input DC power require-
ments.  Figure 24 provides a typical DC powered and grounding arrangement for a single-carrier
cabinet system.
PLUG
NO. 6 
-48V
1 11
111
GRD 
BLOCK EACH CABINET) C AND D
IF PROVIDED
WIRE GRD
PLATE (BETWEEN TO CABINET
DISCH GRD BAR
DC POWER CABINET
GRD
-48V
-48V
TO DC
DISTRIBUTION
UNIT-NEXT
NETWORK GRD (4...

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Grounding
An approved ground for the cabinets used in the equipment room is essential.  A typical
approved ground is one of the following:
dGrounded Building  SteelÐThe metal frame  of  the building where effectively  grounded
by one of the following grounds: acceptable metallic water pipe, concrete-encased
ground, or a ground ring.
dAcceptable Water PipeÐA metal underground water pipe, at least 1/2-inch in diameter,
in direct contact...

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Approved floor grounds are those grounds on a floor of a high-rise building suitable for connec-
tion to the ground terminal in the riser closet and to the PBX equipment single point ground termi -
nal.  Such grounds may be one of the following:
dBuilding steel
dThe grounding conductor for the secondary side of the power transformer feeding the
floor
dMetallic water pipes
dPower feed metallic conduit supplying panel boards on...

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Standby Power SystemÐMulti-Carrier Cabinet System
Battery Reserve (Multi-Carrier System)
The system provides a 10-second power holdover during power interruptions.  A battery  reserve
supplies power to a single control carrier for up to 10 minutes during a commercial power failure.
With duplicated control carriers, power is available for 5 minutes.  If additional holdover power is
required, an alternate, independent source of...

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TABLE S.  DC Power Requirements
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No. of No. of
Control Port Input
Carrier Carrier Power (Watts)
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1 0 630
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1 1 1050
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1 2 1470
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1 3 1890
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1 4 2310
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb c c c
c
c
c c c
c
c
c
c...

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Standby PowerÐSingle-Carrier Cabinet System
The following provides Battery Reserve, Uninterruptible Power Supply, and Battery Backup infor-
mation for single-cabinet systems.
Battery Reserve (Single-Carrier System)
During commercial power failure, the power supply provides a 250-millisecond power holdover to
allow the system to remain in service.  If power is restored within 250 milliseconds, there is no
interruption of service.
A...

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Battery Backup (Single-Carrier System)
A battery supply and an inverter can be used to provide standby power for up to 8 hours after a
commercial power failure.
When standby power is provided, the following items must be taken into consideration:
dSize and weight of the batteries
dSize and weight of the inverter(s)
dHeat dissipation
dAir flow and circulation
dItems of equipment to receive power
This standby power system...

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaUPGRADES AND ADDITIONS
UPGRADES AND ADDITIONS
The upgrade process consists of changing the hardware and software  of  the a previously
installed system to that of a later version system.  An upgrade may be performed in response to
increased call processing demands, need for greater feature capabilities, or other changes in
customer requirements.
The addition process consists of adding voice terminals, circuit packs, carriers, or software
features...

UPGRADES AND ADDITIONSaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
System 75 Upgrade to DEFINITY Generic 1 PPN With Duplication
The System 75 Versions 1 (V1), 2 (V2), or 3 (V3) upgrade to DEFINITY Generic 1 with duplica-
tion requires the following:
dReplacing the J58890AA-1/J58890AB-1 Control Carrier with a J58890AH-1
Control Carrier
dReplacing TN711 Processor circuit pack with a TN773 Processor circuit pack
dReplacing TN734 Memory circuit packs with a TN770 Memory circuit pack
dReplacing TN727...

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System 75 Upgrade to DEFINITY Generic 1 EPN Without
Duplication
The System 75 Medium Cabinet is upgraded to the EPN Cabinet Without Duplication by:
dRemoving the tape drive unit
dRemoving the J58890AA-1/J58890AB-1 Control Carrier
dInstalling the J58890AF-1 expansion Control Carrier
dReplacing TN741 Tone Clock circuit pack with a TN768 Tone Clock circuit pack
dAdding TN775 Maintenance circuit pack
dReplacing the TDM cables...