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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 1 Hardware Installation
ONS 15454 SDH Assembly Specifications
• 10 Base-T
• EFCA access: MODEM RJ-45 connector
1.13.8 Alarm Interface
• Visual: Critical, Major, Minor, Remote
• Audible: Critical, Major, Minor, Remote
• Alarm contacts: open contact max. 60V DC, closed contact 2mA
• EFCA access: Alarm-pin fields, 62-pin DB connectors
1.13.9 Database Storage
• Nonvolatile memory: 128 MB, 3.0V FLASH memory
1.13.10 Timing Interface
• 2 x coaxial inputs
• 2 x coaxial outputs
• EFCA access: BITS 1.0/2.3 miniature coax connector
1.13.11 System Timing
• Stratum 3 E, per ITU-T G.813
• Free-running accuracy: ± 4.6 ppm
• Holdover stability: 3.7 x10
-7
/day, including temperature (< 255 slips in first 24 hours)
• Reference: External BITS, line, internal
1.13.12 Power Specifications
• Input voltage: -48 VDC
• Power consumption: configuration dependent, 53 W for fan-tray
• Power Requirements:
–
nominal: -48 VDC
–
Tolerance limits: -40.5 to -57.0 VDC
• Power terminals: 3WK3 Combo-D Power Cable Connector
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