Quad-band GSM Etross-8848 FWT(imei changeable)

Etross-8848 is a GSM to Analog Converter(single port,insert 1 sim card only), the device can produce a FXS line to allow a regular phone to be connected and used just like a local landline(PSTN) except your calls will go out the GSM network. This device can both receive and make calls. Available: l GSM 900/1800Mhz dual band, employing Wavecom Q2303A, Q2403A Sim300W module to make; l GSM 900/1800/1900Mhz Tri-band, employing Sim300z module to make; l GSM850/900/1800/1900Mhz Quadband, employing Sim340z module to make. 1), Front side has LEDs display for Signal strength, Power, Working Status and Talking indicator; 2), Rear side has1pcs SMA antenna connectors, 2 RJ-11 output,Power port and switch; 3), Front side with 3m cable antennas, this only for display picture, in installation, antenna must be put beyond 1.5m from terminal. Can’t be mounted on the terminal, otherwise noise will be made; 4), Bottom side has 1pcs Sim card holder slots, you can insert Sim card into the slot . 2,Features: 1) It is a 1 channel GSM Gateway which has 2 RJ-11 outputs for extensions; 2) It can connect with ordinary telephone set, PBX , VOIP Gateway, Billing meter etc. ; 3) Dialing tone frequency:450hz; 4) Employ Industrial module [Sim300( Tri-band 900/1800/1900Mhz),M10(Quadband 850/900/1800/1900Mhz) or Q2403A(900/1800MHZ), to make; 5) Can adjust dial interval from 0.5sec to 9 secs by setting up from telephone set; 6) Can adjust voice volume by setting up from telephone set; 7) SIM card supported (1.8V, 3V); 8) Caller ID display; 9) DTMF Dialing; 10) Bell signal; 11) Polarity reversal; 12) The RJ-11 socket which connect the phone or billing system for metering purpose; 13) Antenna socket (SMA); 14) IP Presetting; 15) Working status and Signal Strength by LED indicator; 16) IMEI Change (optional). 17) back up Li-ion battery( Optional) 7.2V 1300mAh.standby 24hrs,talking time: 2.5hrs. 3,Technical Specifications Air interface standard: GSM850/1900Mhz,900/1,800Mhz phase 2+ full band Frequency ranges: A) GSM 850 GSM 1900: I) Transmission: 869.2 893.8MHz I) Transmission: 1, 930 1, 990MHz Ii) Reception: 824.2 848.2MHz Ii) Reception: 1, 850 1, 910MHz B) GSM 900: GSM 1800: I) Transmission: 890 915MHz I) Transmission: 1, 710 1, 785MHz Ii) Reception: 935 960MHz Ii) Reception: 1, 805 1, 880MHz Phone interface: supply RJ-11 Phone Interface Hanging voltage: 45V Picking off voltage: 30mA / 41mA Dialing tone Frequency: 450Hz Antenna interface: Antenna amplifying>2.5db