NEW Design 4PORTS VIN-254 GSM Gateway PBX for call center with one open telephone number- HOT

Name: 4SIM(Cards) GSM Gateway Terminal with PBX feature / for call center application Product Model: VIN254   Newly Design, GSM Gateway Terminal with PBX feature - ONE Pulbic Telephone Number to clients / customers - With internal lines pbx feature, Ext.401 to Ext.404 call easily and free of charge - HOT Line / Call Center Application -  Typical application example:  the terminal support 4 GSM SIM cards with 4 different telephone numbers, for special cases, you can not open all the telephone numbers, but you can advise only one telephone number to be open to customers ( like HOT Line Number / advertisement Tel. no. ), when one customer call the hot line (open telephone number ), then Ext.401 receptionist can receive it, meanwhile, another customer call the hot line (the open tel no.), the call will forward to Ext.402 automatically, and Ext.402 receiptionish can receive the call timely, if at the same time, the third cusotmer call the hot line, the call will forward to Ext.403 automatically,and Ext.403 receitionist can receive the call......., like this way, all the calls from the customers will not lost, will not lost any business opportunity.    Meanwhile, among the 4 extensions, from Ext.401 to Ext.404 can call and communicate freely and easily without any charge fee.  --  HOT and NEW !!!    Basic Features: 
    1)  Providing 900MHz and 1800MHz GSM connectivity. Or 850MHz/1900MHz or 850/900/1800/1900Mhz for option.
    2)  IMEI changed (optional) 
    3)  Simple to install/easy to maintain 
    4)  Allow PIN code entering and reciprocal phone-card lock 
    5)  Provide optimized circuit directly connecting the exchange device for extensions 
    6)  Polarity reversal signal for metering 
    7)  3.5dBi gain antenna 
    8)  Compatible to PABX, VoIP gateway, IP PBX, Call back system, cord phone, Voice system, and etc. 
    9)  Suitable for call termination of ISP 
    10)  Dialing tone 
    11)  DTMF Dialing 
    12)  Caller ID. With DTMF/FSK(FSK is optional)
    13)  Hide calling out number. 
    14)  Provide accuracy polar inverse or 12k/16k Hz signal for payphone 
    15)  Working state indicator      16)  Signal Strength indicator      
Technical data:
    Air interface standard: GSM 900/1800 MHz Phase 2+
    Frequency ranges:
    GSM900:
    Transmit: 890~915MHz;
    Receive: 935~960MHz
    GSM1800:
    Transmit: 1710~1785MHz;
    Receive: 1805~1880MHz
    Channel space: 200KHz
    Sensitivity: -104dB
    Peak power consumption: 16W
    Phone interface: Supply RJ-11 Phone Interface Hanging voltage: 48V. Dialing  tone     Frequency: 450Hz
    Operating environment requirements:
    Temperature: 0C - +40C
    Relative humidity: 45% - 90%
    Connectors: SMA antenna connector
    Atmospheric pressure: 86~106Pka
    Power consumption: Static≤ 200 mA, emission≤ 4000 mA
    Antenna: Gain: 3.5dB (all directional) 12 dB(Certain/selection)
    Power supply:
    AC220V more or less 10% 47-54Hz AC110V/60Hz( optional)
    DC12V (optional)