The weak signal threshold of CMDA EvDo RSSI. The absolute
value of h3c3GCdmaEvDoRssiMediumThreshold should be less than
or equal to the absolute value of h3c3GCdmaEvDoRssiWeakThreshold
(|h3c3GCdmaEvDoRssiMediumThreshold| <= |h3c3GCdmaEvDoRssiWeakThreshold|).