Cisco ONS 15454 - Page 499

Alarm Interface
The ONS 15454 alarm interface has these specifications:
• ETSI
• Visual: Critical, Major, Minor, Remote
• Audible: Critical, Major, Minor, Remote
• FMEC access: 62-Pin DB connector on MIC-A/P faceplate
• Alarm inputs: Common 32-VDC output for all alarm-inputs, closed contact limited to 2 mA
• Control outputs: Open contact maximum 60 VDC, closed contact maximum 100 mA
• ANSI
• Visual: Critical, Major, Minor, Remote
• Audible: Critical, Major, Minor, Remote
• Backplane access: Alarm pin fields
• Alarm contacts: 0.045 mm, –48 V, 50 mA
EIA Interface (ANSI only)
The ONS 15454 electrical interface assembly (EIA) interface has these specifications:
• SMB: AMP #415504-3 75-ohm, 4-leg connectors
• BNC: Trompeter #UCBJ224 75-ohm 4 leg connector (King or ITT are also compatible)
• AMP Champ: AMP#552246-1 with #552562-2 bail locks
BITS Interface (ANSI only)
The ONS 15454 building integrated timing supply (BITS) interface has these specifications:
• 2 DS-1 BITS inputs
• 2 derived DS-1 outputs
• Backplane access: BITS pin field
System Timing
The ONS 15454 ANSI has these system timing specifications:
• Stratum 3 per Telcordia GR-253-CORE
• Free running accuracy: +/– 4.6 ppm
• Holdover stability: 3.7 x 10–7 per day, including temperature (< 255 slips in first 24 hours)
• Reference: External BITS, line, internal
The ONS 15454 ETSI has these system timing specifications:
• Stratum 3E, per ITU-T G.813
• Free running accuracy: +/– 4.6 ppm
• Holdover stability: 3.7 exp –7 per day, including temperature (< 255 slips in first 24 hours)
• Reference: External BITS, line, internal
Cisco ONS 15454 Hardware Installation Guide
469
Hardware Specifications
Alarm Interface