AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 29)

EXPANSION CONTROL CIRCUIT PACKS

DEFINITY COMMUNICATIONS SYSTEM, G1

Maintenance TN775

●

Controls and monitors the environmental and power systems in the

EPN cabinet

●

Provides two serial links to communicate with the TN776 Expansion

Interface circuit packs

Provides access for the Manager I terminal

●

Current Limiter Card CFY1

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Connects to the back of the maintenance circuit pack slot

●

Provides same function for the EPN cabinet that 982LS provides for

the PPN cabinet

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

single-carrier cabinet)

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Supplies tones and clocks

●

Provides clock for Network Synchronization

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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)

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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 29