If only one channel is available in the frequency band equipment protection can be optionally implemented with a1 + 1hot standby configuration.
如果频带中只有一个信道可用，可以选择使用1 + 1热备用配置实现设备保护。
2
The maximum protection and maximum availability modes require that standby redo log files are configured on at least one standby database in the configuration.
最大保护和最大可用性模式需要备重做日志文件配置在配置中的至少一个备数据库上。
3
Safety protection, energy save and extend heater life. Auto power cut-off under the circumstances of standby for 30 minutes, failure of temperature test, PCB, heating element and low tip temperature.