Cisco ONS 15454 SDH Dokumentacja Pobierz pdf (Strona 54)

Cisco ONS 15454 SDH Product Overview

Hardware

Cisco ONS 15454 SDH Product Overview, R3.4

September 2002

Timing Interface

The ONS 15454 SDH timing interface has the following specifications:

• 2 x coaxial inputs

• 2 x coaxial outputs

• EFCA access: BITS 1.0/2.3 Miniature Coax connector

System Timing

The ONS 15454 SDH system timing has the following specifications:

• Stratum 3E, per ITU-T G.813

• Free-running accuracy: 4.6 ppm

• Holdover stability: 3.7 x10

-7

per day, including temperature (< 255 slips in

first 24 hours)

• Reference: External BITS, line, internal

Power Specifications

The ONS 15454 SDH has the following power specifications:

• Input Voltage: –48 VDC (future release will support –60 VDC)

• Power Consumption: Configuration dependent, 53W for fan tray

• Power Requirements:

–

Nominal: –48 VDC

–

Tolerance Limits: –40.5 to –57.0 VDC

• Power Terminals: 3WK3 Combo-D Power Cable Connector

Environmental Specifications

The ONS 15454 SDH has the following environmental specifications:

• Operating temperature: 0 to +40 degrees Celsius

• Operating humidity: 5 to 95%, noncondensing

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Cisco ONS 15454 SDH Dokumentacja Strona 54