The battery defense modes offers the operator the possibility to select the preferred power defense mode in case the system falls back to the battery mode. The power defense mode is a way to optimize the power consumption. In R5001 two options are possible. In later releases additional defense modes will be introduced. - no battery defense. In this mode the system will run normally, offering regular service until the battery runs out and the regular hw defenses are started (Dying Gasp) - voice priority. In this mode when the system falls back to the battery the regular service will be maintained until the battery drains until 90% and will then give priority to the voice LT's by powering down the DSL LT's. Voice service will be maintained until the battery runs out and the regular hw defenses are started (Dying Gasp). This configuration only possible for planned powermanagement devices, in this case a planned RANI-B or RPNI-B. ALCATEL NOTE: SUPPORT: YES INSRVMOD: NA RANGE: See above PERSIST: YES DEFVALUE: 0 UNITS: -