Juniper G10 CMTS, Руководство по оборудованию

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JUNOSg 3.0 G10 CMTS Hardware Guide 72
DC Power
The G10 CMTS requires a DC power source that operates within a voltage range of –36 to
–75 VDC. Unlike the AC configuration, the DC power transition modules do not operate
independently. Each DC power transition module supports the power supplies in both
domains of the chassis. If one DC power transition module fails, all the current for the system
must be supplied from a single power source. Therefore, within the United States, a 50 A
circuit breaker (36 A maximum, plus margin) must be used with each of the two independent
DC power sources connected to the CMTS. Outside the United States, each DC power source
must have circuit breaker protection to account for a maximum current of 36 A, plus
additional margin required by local regulations.
Use the factory-supplied DC power cord ring lugs, and wire according to your local code for
the DC power cord connection to the G10 CMTS.
Environment
The installation site must meet the specifications provided in Table 25 to maintain the proper
environmental conditions for the G10 CMTS.
Table 25: G10 CMTS Environmental Specifications
Parameter Condition Requirement
Temperature Ambient operating 0° to +40°C (0° to +104°F)
Ambient non-operating –35° to +60°C (–31° to +140°F)
Humidity Ambient operating and non-operating 10% to 90% (non-condensing)
Altitude Operating and non-operating 0 to 3048 m (10,000 ft)
Vibration Operating 5 Hz to 200 Hz, at 1.0g (1.0 oct/min)
Non-operating 5 Hz to 200 Hz, at 1.0g (1.0 oct/min)
200 Hz to 500 Hz, at 2.0g (1.0 oct/min)