ATT DEFINITY Communications System Generic 3 Pocket Reference Instructions Manual

CIRCUIT PACKS
CodeName
Type
TN746, BAnalog Line
Port
TN747BCO Trunk
Port
TN748C, DTone Detector
Service
TN750, BAnnouncementService
TN753
DID TrunkPort
TN754, B
Digital LinePort
TN755BPower Unit, Neon
Power
TN758Pooled Modem
Service
TN760D
Tie TrunkPort
TN762BHybrid LinePort
TN763B, C, DAuxiliary TrunkPort
TN767BDS1/E1 Interface
Port
TN768Tone-clock
Service
TN769Analog Line
Port
TN771DMaintenance/Test
Service
TN775BMaintenanceService
TN780Tone-clockService
TN1648System Access/MaintenanceService...

CIRCUIT PACKS
CodeNameType
TN1656
Tape DriveControl
TN1657
Disk DriveControl
UN330BDuplicaton Interface
Control
UN331B
ProcessorControl
UN332Mass Storage/Network ControlControl
WP-91153
Power Supply (AC)Power
57 

CONTROL CIRCUIT PACKS
CONTROL CIRCUIT PACKS
Call Classifier TN744 (G3V2)
Provides 8 ports for touch-tone reception and call classification. It
is required with OCM and call prompting applications.
One TN748C Tone Detector is required in each port network to sup-
port maintenance test tones when using the TN744 circuit pack.
Current Limiter Card 94782LS (G3iV2)
The 982LS connects to the back of the processor board slot. It pro-
vides current limited accessory 48 volts, emergency transfer logic,
current...

CONTROL CIRCUIT PACKS
Duplication Interface TN772 (G3iV2)
Selects the active processing element (control complex) in a dupli-
cated system and coordinates the interchange of processing ele-
ments. Controls and provides the memory shadowing function with
the duplication option. Terminates the environmental sensors and
controls the integrated battery supply and charging circuits. Selects
the active tone-clock circuit pack. Provides the G3-Management
Terminal interface in place of the processor. A second...

CONTROL CIRCUIT PACKS
Expansion Interface TN776 (G3iV2)
Provides for the extension of the TDM bus from the PPN cabinet to
the TDM bus of the EPN cabinet. Packages the TDM control chan-
nel with LAPD control for transmission over the fiber link between
cabinets. Provides the time slot interchange between cabinets. A
system with ASAI/BRI requires TN570 Expansion Interface circuit
packs instead of TN776 Expansion Interface circuit packs to con-
nect the TDM bus and packet bus of the PPN to the TDM bus and...

CONTROL CIRCUIT PACKS
Terminates the fiber optic link(s) between the PPN cabinet and the
EPN cabinet.
Maintenance TN775 (G3sV2, G3vsV2, G3iV2)
The TN775B is used for system maintenance and performs the fol-
lowing functions:
l
l
l
lMonitors power failure signals
Monitors the clock
Provides two serial links to communicate with expansion
interface circuit packs
Contains a three-position switch that controls emergency
power transfer
Monitors and controls power supplies and battery charger
Monitors air flow...

CONTROL CIRCUIT PACKS
lISDN-PRI testing, which makes test calls that originate
and terminate loop-back tests on the ISDN facilities. It
provides bit and block error rate information that can be
used to indicate ISDN facility quality.
Memory (CPP1) (G3iV2 and G3rV2)
The CPP1 accommodates an additional 4 megabytes of DRAM and
2 megabytes of Flash ROM. The CPP1 includes byte parity and
has the same access time as the memory on the Processor circuit
pack.
Mass Storage System/Network Control UN332
(G3rV2)...

CONTROL CIRCUIT PACKS
Network Control TN777B (G3sV2, G3vsV2,
G3iV2)
The TN777B provides the following functions
l
lCommunicates control channel messages between the
processor circuit pack and the distributed network of port
circuit packs on the Time Division Bus (TDM).
Controls the four channels that process and route infor-
mation directly from the processor circuit pack to the cus-
tomer connected equipment. Some of the possible equip-
ment connections are Data Services facilities, Station
Message...

CONTROL CIRCUIT PACKS
Packet Data Line TN553 (G3rV2)
In conjunction with a TN726B circuit pack, provides connections to
system ports.
Packet Gateway TN577 (G3rV2)
TN577 is an X.25 protocol interface between the system and
adjuncts. For example, the TN577 serves as the interface between
AUDIX and the system.
Packet Interface TN1655 (G3rV2)
Provides the communication path between the SPE and the LAN
bus in the PPN. This path is used by the EPNs and the CSS, via
EI circuit packs in the PPN, to communicate...

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 l
 l
 l
 l
CONTROL CIRCUIT PACKS
Processor (TN786B) (G3vsV2, G3sV2, G3iV2)
The TN786B provides the means for storing and executing the
software which operates the system features. The Processor cir-
cuit pack consists of:
A 80386SX Intel processor
6 megabytes of Flash ROM
4 megabytes of DRAM
An interface to the MBUS
Logic to support the shadowing function in duplicated
systems
In addition, the Processor performs maintenance functions such as:
l
l
lMonitoring the sanity of the system Processor...