Specifications

ManualsBrandsSentry ManualsMusical equipmentSPD 5.5.5

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NOTES:

The following systems MTBFs were provided by the supplier: Power Supply,

Fan, and Routing Engine.

* Power supplies, Fan Trays, MCS, and REs are fully redundant: 1 to 1. One

SFM can support the system wit h reduced bandwidth; hence, 1:4 active

redundancy.

** Predicted measure of the degree to which a system is in an operable state

at any time (MTTR : Mean Time To Repair).

OC3 SMF POS SYSTEM RELIABILITY ANALYSIS

SMF XcvrSMF Xcvr

FPCFPC--11

ChassisChassis

SystemSystem

OC3 AOC3 A

OC3 BOC3 B

MTBF (khrs) ** Availability (At 40C)

40C 25C MTTR = 24hrs MTTR = 12hrs

FPC-1 (CPU, 4SRAM, 8DRAM) 80 143 0.9997001 0.9998500

OC3A PIC 464 769 0.9999483 0.9999741

OC3B PIC 643 1078 0.9999627 0.9999813

Chassis System 64 114 0.9996251 0.9998125

SYSTEM RELIABILITY 31 56 0.9992365 0.9996181

OC3 MMF POS SYSTEM RELIABILITY ANALYSIS

MMF XcvrMMF Xcvr

FPCFPC--11

ChassisChassis

SystemSystem

OC3 AOC3 A

OC3 BOC3 B

MTBF (khrs) ** Availability (At 40C)

40C 25C MTTR = 24hrs MTTR = 12hrs

FPC-1 (CPU, 4SRAM, 8DRAM) 80 143 0.9997001 0.9998500

OC3A PIC 597 985 0.9999598 0.9999799

OC3B PIC 931 1555 0.9999742 0.9999871

Chassis System 64 114 0.9996251 0.9998125

SYSTEM RELIABILITY 32 57 0.9992596 0.9996296

OC3-2-B SMF ATM SYSTEM RELIABILITY ANALYSIS

SMF XcvrSMF Xcvr

FPCFPC--11

ChassisChassis

SystemSystem

OC3 AOC3 AATM AATM A

MTBF (khrs) ** Availability (At 40C)

40C 25C MTTR = 24hrs MTTR = 12hrs

FPC-1 (CPU, 4SRAM, 8DRAM) 80 143 0.9997001 0.9998500

ATM A 544 1058 0.9999559 0.9999779

OC3A PIC 464 769 0.9999483 0.9999741

Chassis System 64 114 0.9996251 0.9998125

SYSTEM RELIABILITY 31 56 0.9992298 0.9996147

OC3-2-B MMF ATM SYSTEM RELIABILITY ANALYSIS

MMF XcvrMMF Xcvr

FPCFPC--11

ChassisChassis

SystemSystem

OC3 AOC3 AATM AATM A

MTBF (khrs) ** Availability (At 40C)

40C 25C MTTR = 24hrs MTTR = 12hrs

FPC-1 (CPU, 4SRAM, 8DRAM) 80 143 0.9997001 0.9998500