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Appendix A
Hardware Specifications
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A.1.7 Alarm Interface
The ONS 15454 alarm interface has the following specifications:
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A.1.8 EIA Interface
The ONS 15454 EIA interface has the following specifications:
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A.1.9 BITS Interface
The ONS 15454 building integrated timing supply (BITS) interface has the following specifications:
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A.1.10 System Timing
The ONS 15454 has the following system timing specifications:
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A.1.11 System Power
The ONS 15454 ANSI has the following power specifications:
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78-18106-01
Hardware flow control
TCC2/TCC2P: EIA/TIA-232 DB-9 type connector
Visual: Critical, Major, Minor, Remote
Audible: Critical, Major, Minor, Remote
Alarm contacts: 0.045 mm, –48 V, 50 mA
Backplane access: Alarm pin fields
SMB: AMP #415504-3 75-ohm, 4-leg connectors
BNC: Trompeter #UCBJ224 75-ohm 4 leg connector (King and ITT are also compatible)
AMP Champ: AMP#552246-1 with #552562-2 bail locks
2 DS-1 BITS inputs
2 derived DS-1 outputs
Backplane access: BITS pin field
Stratum 3 per Telcordia GR-253-CORE
Free running accuracy: +/–4.6 ppm
Holdover stability: 3.7 x10
Reference: External BITS, line, internal
Nominal Input Voltage: –48 VDC
Power consumption: Configuration dependent; 55 W (fan tray only)
Power requirements:
–7
per day, including temperature (< 255 slips in first 24 hours)
A.1.7 Alarm Interface
Cisco ONS 15454 Reference Manual, R8.5
A-3
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