... GSM900M/1800M/850M/1900M 2.With PSTN network, and switch the GSM and PSTN freely. 3.Supporting SMS function. ... calls. Handset function: 1. 2.4 G digital wireless phone.2. Locking keypad.3. Calculating call duration ... divided into sixteen category, including wireless telephone, GSM terminal, wireless network card, PBX related to GSM, CDMA, TD-SCDM, WCDMA. ... , CE, ROSH etc. 2.4G GSM fixed wireless phone