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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 3 Card Reference
DS3i-N-12 Card
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Bit Rate: 34.368 MBits/s (Mbps) + 20 ppm
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Line Code: HDB-3
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Termination: Unbalanced coaxial cable
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Output Impedance: 75 Ω + 5%
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AIS: ITU-T G.704-compliant
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Power Level: -1.8 to +5.7 dBm
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Pulse Shape: ITU-T G.703, Figure 17
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Pulse Amplitude: 0.36 to 0.85 V peak-to-peak
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Loopback Modes: Terminal and Facility
• E3-12 Electrical Interface
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Connectors: 1.0/2.3 Miniature Coax connectors in FMEC-E3/DS3
• 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
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Operating Humidity: 5 to 95%, non-condensing
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Power Consumption: 38.20 W, 0.80 A (AMPS) at -48V, 130.4 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.)
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Weight not including clam shell: 0.7 kg (1.7 lb)
• Compliance
ONS15454 SDH cards, when installed in a system, comply with these standards:
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Safety: IEC 60950, EN 60950, UL 60950, CSA C22.2 No. 60950, TS 001, AS/NZS 3260
3.10 DS3i-N-12 Card
The twelve-port ONS 15454 SDH DS3i-N-12 card provides twelve ITU-T G.703, GR-499, ITU-T G.704
compliant DS-3 ports per card. Each port operates at 44.736 MBits/s (Mbps) over a 75Ω coaxial cable
(with FMEC-E3/DS3). The DS3i-N-12 can detect several different errored logic bits within a DS-3
frame. This function lets the ONS 15454 SDH identify a degrading DS-3 facility caused by upstream
electronics (DS-3 Framer). In addition, DS3 frame format auto detection and J1 path trace are supported.
By monitoring additional overhead in the DS-3 frame, subtle network degradations can be detected.
Figure 3-13 shows the DS3i-N-12 faceplate and Figure 3-14 shows a block diagram of the card.
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