GSM and PCS 1900 digital cellular phones

摘要

Since the CSM digital cellular phone standard was established in 1991, it has been adopted in about 100 nations and currently serves some 60 million subscribers. Mitsubishi Electric has recently developed a lightweight CSM cellular phone using 3Vtechnology throughout to achieve a standby time in excess of 100 hours. This report introduces Model MT-30 for GSM applications and Model G100 for use under PCS1900, a CSM-based 1.9GHz-band system adopted by the United States.