Hi, I know that ser can be used to set up sms gateway. Does it mean that I can send SMS through PSTN line without using GSM modem? Thank you. Thomas -- Cybertel Works Ltd. Unit 12, 6/F, Tower B, New Trade Plaza, 6 On Ping Street, Shatin, N.T., Hong Kong Tel. : 852 - 2637 2221 Fax.: 852 - 2541 1535 Email : support at cybertel.biz Website : www.cybertel.biz