AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 27)

CONTROL CIRCUIT PACKS (Contd)

DEFINITY COMMUNICATIONS SYSTEM, G1

Network Control TN777

●

Continuously Monitors Port Circuit Packs

Transfers Data to Processor Circuit Packs

Houses Data Channels for switched Manager I terminal access

Provides real time of day clock with battery backup

Monitors status of system clocks

Supports the duplicated processor option

Processor TN773

●

Manages Control of Entire System

●

32K RAM

●

196K ROM/EPROM

Memory TN770

●

Contains All System Translations

●

6 MBYTES RAM

●

One required for basic system, two required for duplicated system

Tape Drive TN774

●

Provides control and data transfer

Tone-Clock TN768 (standard in multi-carrier cabinet—optional in

single-carrier cabinet)

●

Supplies tones and clocks

Provides clock for Network Synchronization

One required for basic PPN system, two required for duplicated PPN

system.

One required for basic EPN cabinet, two required for EPN cabinet in a

duplicated system.

Tone Detector/Generator TN756 (single-carrier cabinet).

●

Provides 4 Touch-tone Receiver Ports and 2 Tone Detector Ports

●

Provides tone generation and clock generation

●

Used instead of TN768 and TN748C in systems without DS1, EPN, or

Tone Detector TN748C

●

Provides 4 Touch-tone Receiver Ports and 2 Tone Detector Ports.

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AT&T DEFINITY 7100 series Manual de usuario Pagina 27

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