First, I would like to give you brief introduction about C-TOP. C-TOP was found in 1996 and  is professional wireless telecommunication manufacturer in China and have developed GSM/CDMA Fixed wirless phone/terminal/payphone since 2000 and VoIP phone,EDGE/GPRS/GSM modem, VoIP gateway and VoIP USB Phone since 2003.  we have built up a firm relationship with various customer from national market and international market. Owning 30 unit of area with advanced SMT mounting line, strong R&D terms, strict QC and best after sales service, C-TOP's products have been widely used in the international marekt and domestic market. we have received high reputation from our customers. Now our production capacity is 150K per month.  We are also ISO9001-2000 certified company. Kindly visit our website for detail