The KK34118 may be operated from a power supply, or it can be powered from the telephone line, requiring typically 5.0 mA. The KK34118 can be interfaced directly to Tip and Ring (through a coupling transformer) for stand-alone operation, or it can be used in conjunction with a handset speech network and or other features of a feature phone. Improved Attenuator Gain Range: 52 dB Between Transmit and Receive