user manual

A-15
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
– Bit rate: 44.736 Mbps +/–20 ppm
– Frame format: ITU-T G.704, ITU-T G.752/DS-3 ANSI T1.107-1988
– Line code: B3ZS
– Termination: Unbalanced coaxial cable
– Input impedance: 75 ohms +/– 5%
– Cable loss:
Maximum 137 m (450 ft): 734A, RG59, 728A
Maximum 24 m (79 ft): RG179
– AIS: ITU-T G.704 compliant
• DS3i-N-12 output
– Bit rate: 44.736 Mbps +/– 20 ppm
– Frame format: ITU-T G.704, ITU-T G.752/DS-3 ANSI T1.107-1988
– Line code: B3ZS
– Termination: Unbalanced coaxial cable
– Output impedance: 75 ohms +/–5%
– AIS: ITU-T G.704 compliant
– 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.)
– Pulse shape: ITU-T G.703, Figure 14/ANSI T1.102-1988, Figure 8
– Pulse amplitude: 0.36 to 0.85 V peak-to-peak
– Loopback modes: terminal and facility
– Line build out: 0 to 69 m (0 to 225 ft); 69 to 137 m (226 to 450 ft)
• DS3i-N-12 electrical interface
– Connectors: 1.0/2.3 miniature coax connectors via the FMEC-E3/DS3 card
• Environmental
– Overvoltage protection: As in ITU-T G.703 Annex B
– Operating temperature: –5 to +45 degrees Celsius (+23 to +113 degrees Fahrenheit)
– Operating humidity: 5 to 95%, noncondensing
– Power consumption: 26.80 W, 0.56 A at –48 V, 91.5 BTU/hr
• Dimensions
– Height: 321.3 mm (12.650 in.)
– Width: 18.2 mm (0.716 in.)
– Depth: 228.6 mm (9.000 in.)
– Depth with backplane connector: 235 mm (9.250 in.)