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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Appendix A Hardware Specifications
A.5.4 DS3i-N-12 Card Specifications
A.5.4 DS3i-N-12 Card Specifications
The DS3i-N-12 card has the following specifications:
• DS3i-N-12 input
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Bit rate: 44.736 Mbps +/–20 ppm
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Frame format: ITU-T G.704, ITU-T G.752/DS-3 ANSI T1.107-1988
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Line code: B3ZS
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Termination: Unbalanced coaxial cable
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Input impedance: 75 ohms +/– 5%
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Cable loss:
Maximum 137 m (450 ft): 734A, RG59, 728A
Maximum 24 m (79 ft): RG179
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AIS: ITU-T G.704 compliant
• DS3i-N-12 output
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Bit rate: 44.736 Mbps +/– 20 ppm
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Frame format: ITU-T G.704, ITU-T G.752/DS-3 ANSI T1.107-1988
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Line code: B3ZS
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Termination: Unbalanced coaxial cable
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Output impedance: 75 ohms +/–5%
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AIS: ITU-T G.704 compliant
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Power level: –1.8 to +5.7 dBm (The power level is for a signal of all ones and is measured at a
center frequency of 22.368 MHz (3 +/– 1 kHz) bandwidth.)
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Pulse shape: ITU-T G.703, Figure 14/ANSI T1.102-1988, Figure 8
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Pulse amplitude: 0.36 to 0.85 V peak-to-peak
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Loopback modes: terminal and facility
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Line build out: 0 to 69 m (0 to 225 ft); 69 to 137 m (226 to 450 ft)
• DS3i-N-12 electrical interface
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Connectors: 1.0/2.3 miniature coax connectors via the FMEC-E3/DS3 card
• Environmental
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Overvoltage protection: As in ITU-T G.703 Annex B
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Operating temperature: –5 to +45 degrees Celsius (+23 to +113 degrees Fahrenheit)
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Operating humidity: 5 to 95%, noncondensing
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Power consumption: 26.80 W, 0.56 A at –48 V, 91.5 BTU/hr
• Dimensions
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Height: 321.3 mm (12.650 in.)
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Width: 18.2 mm (0.716 in.)
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Depth: 228.6 mm (9.000 in.)
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Depth with backplane connector: 235 mm (9.250 in.)