Question: what are dbm and asu?
Answer: Arbitrary Strength Unit (ASU) is an integer value proportional to the received signal strength measured by the mobile phone. ... In GSM networks, ASU maps to RSSI (received signal strength indicator, see TS 27.007 sub clause 8.5). dBm = 2 × ASU - 113, ASU in the range of 0.31 and 99 (for not known or not detectable).