Juniper Networks G10 CMTS manual Replacement Procedures

Chapter 9		•
Replacement Procedures		•
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This chapter discusses the following topics related to the removal and replacement of CMTS		•
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hardware components:
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! Power Supplies on page 159		•
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! Fan Trays on page 162		•
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! Module Removal on page 166		•
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	Before replacing a power supply or any module from the	•
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	CMTS, attach one end of an ESD ground strap to your wrist
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	and attach the other end to the ESD ground strap jack on
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	the front of the chassis (see Figure 5 on page 12).
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Power Supplies		•
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The G10 CMTS can operate in a power redundant or non-redundant configuration. Power		•
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redundancy consists of redundant power supplies, power transition modules, and power		•
sources:		•
! Power supplies—The G10 CMTS can accommodate up to ten power supplies within		•
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domains A and B.		•
! Power transition modules—All G10 CMTS systems are shipped with two power transition		•
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modules installed in each of the two domains to implement power transition module		•
redundancy. This also facilitates power source redundancy.		•
! Power sources—Each power transition module must be powered by sources on different		•
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circuits to implement power source redundancy.		•
When operating in a power-redundant configuration, a single power-related component can		•
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fail without affecting the operation of the CMTS. However, because the CMTS is no longer		•
operating as a redundant system, we recommend that you replace the faulty component as		•
soon as possible. The component can be hot-swapped without powering down the CMTS.		•
To determine if a power supply has faulted, check the status of the power supply LEDs. If the		•
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Power LED is not illuminate green, or if the Fault LED is illuminated, take the appropriate		•
actions as described in Table 40 on page 124.		•
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Replacement Procedures 159