我公司专为配合VOIP网关上车落地用而研发生产的GSM/CDMA网关，语音清晰，反极准确，质量稳定，不死机。参数与PSTN相同。价格优惠。 而且可以修改IMEI码。有32张卡可以自动切换。有效突破封锁。是做VOIP上车、落地的最佳选择。产品极受全球欢迎。已经销售超过10000台。相关参数如下：Features: ◇ Dialingtonewith450hz◇ DTMFDialing◇ Bellsignal◇ Polarityreversal◇ TheRJ-11socketwhichconnectthephoneorthepayment◇ Antennasocket(FME)◇ IPusageswitch◇ Workingstateindicator◇ SignalStrengthindicatorTechnicalSpecificationsGSMModuleDualbandGSM850mhz/900mhz/1800mhz/1900MHz Phoneinterface：supplyRJ-11PhoneInterface Hangingvoltage:45V Pickingoffvoltage：30mA/41mA DialingtoneFrequency：450Hz Antennainterface：Antennaamplifying〉1.5DBSensitivity〈-104DBMTransmittingpower 3W Adapterinterface：INPUT：AC175~260VOUTPUT：+12V/1000MA OperationCircumstance: Operationtemperature：-10℃~60℃ Storagetemperature：-20℃~70℃ Operationhumidity：45% 95% Atmospherepressure：86 106Kpa Environmentnoise：〈60DB TransmittingPower:2W Sensitivity: -104dbm AntennaAmplifying: 1.5db Dialingfrequency:450Hz Hangingvoltage:45V Pickingcarrent:30mA/41mA