1) Can accommodate both dynamic and piezoelectric receivers, simply by changing the circuit constant for a wide dynamic reception range. 2) Automatic gain control (AGC) is used, based on the transmission and reception telephone line current, for easier compliance with communications standards. FBlock diagram
3) Erroneous operation caused by high-frequency electrical wave interference is minimized. 4) An HSOP package is used, eliminating the need for an attached transistor to dissipate heat. Thi.
