New data or telephony services will require a much higher level of network reliability, which means standby power supplies will have to work without fail. In addition to meeting Federal Communications Commission requirements, getting the reverse path working, keeping the network fully operational, and keeping up with new installations, disconnects, service calls and other customer issues, technicians now will have to maintain significantly more standby power supplies than ever before not an easy task, considering that qualified technicians are as hard to find as the proverbial needle in the haystack. Powering systems Advanced cable TV networks carrying voice and data traffic as well as video programming still are emerging. To meet the their dynamic needs, standby power supply manufacturers have become very creative in providing solutions. Regardless of the configuration, all standby powering systems need periodic maintenance.
Blackouts are far less common than brownouts.
In a study by Bell Labs several years ago, it was found that 90 percent of all power company disturbances were most likely to be brownouts or power sags. Clearly, brownouts are a more significant threat. The utility company Utility power usually is delivered to neighborhoods as three-phase power. Therefore, there is a higher probability that the cable network could experience a power problem but the subscriber would not experience the same problem. If the standby power supply is not capable of working in standby mode, the subscriber experiences an interruption of network services, but doesn t experience a power outage.