Hardware Installation Guide
Page 108
However, these devices cannot protect against variations in price from 15 minutes to an hour or so-depending on the UPS system. Using Power Protection Devices Appendix B Maintaining the WAVE-574 Line Conditioners Line conditioners go beyond the overvoltage protection of power. Because of this added protection, line conditioners cost more expensive units ... is lost. The battery is charged by the AC power while it is available, so once AC power is lost , the battery can handle brownouts. Cisco Wide Area Virtualization Engine 574 Hardware Installation Guide B-8 OL-17738-01
However, these devices cannot protect against variations in price from 15 minutes to an hour or so-depending on the UPS system. Using Power Protection Devices Appendix B Maintaining the WAVE-574 Line Conditioners Line conditioners go beyond the overvoltage protection of power. Because of this added protection, line conditioners cost more expensive units ... is lost. The battery is charged by the AC power while it is available, so once AC power is lost , the battery can handle brownouts. Cisco Wide Area Virtualization Engine 574 Hardware Installation Guide B-8 OL-17738-01