High cost-effective gsm imsi catcher Quality.NICEUC VoIP GSM Gateway is for operators, enterprises, SOHO, virtual operators to offer affordable VoIP solutions. It is a full-featured IP-based GSM wireless network of VoIP gateways, which can provide stable network configuration, powerful features, good voice quality. This GSM Gateway uses the industry's popular chip technology to support E1, GSM / CDMA / WCDMA / 4G LTE, SIP, IMS interface, supports maximum 4 ports E1 / T1, 96 ports GSM / CDMA / WCDMA / 4G LTE, 128 SIP trunks. Our GSM gateway is not only full compatible with Asterisk and other leading soft switch, but also is a cost-effective gateway for call termination (VoIP to GSM) and origination (GSM to VoIP).

VoIP GSM Gateway / GoIP (GSM over IP): It serves to establish direct connection between GSM network and VoIP.Sim-card is put into GSM Gateway in order to register it with the GSM network, at the same time the gateway is connected with VoIP. Accordingly, the communication (traffic / calls / SMS) can be converted in and out between GSM and VoIP channels.

On hardware, with rack design, they can be installed in the standard 19 inches rack, also can be separately installed in a small machinery room. (In a standard 19 inches rack, NC-MG320W is 1U height, NC-MG640W is 2U height, and NC-MG930W is 3.5U height.)We are trying to use following diagram to describe how and where NICEUC's GoIP/VoIP GSM Gateway with 4 to 96 ports GSM/CDMA/3G/4G will be used. Hopefully they are helpful for you to understand.

The passive IMSI catcher works by capturing IMSI numbers when a phone initializes a connection to a base station. The IMSI is only disclosed during this initial connection. In an effort to protect privacy, all subsequent communication to that base station is done with a random Temporary Mobile Subscriber Identity (TMSI) number.

This means you will only collect IMSI numbers for devices as they move between base stations. Traditional IMSI catchers work differently, by spoofing a legitimate base station and forcing subscribers to connect to itself. They have the added ability to collect data about stationary devices, and can potentially have a more targeted range.

Motherboard, an online technology magazine has recently run an article titled "With $20 of Gear from Amazon, Nearly Anyone Can Make This IMSI-Catcher in 30 Minutes". The article describes how an RTL-SDR together with the IMSI-Catcher Linux software can be used to collect IMSI numbers from cellphones connected to a nearby cell tower. The IMSI is a unique number assigned to each SIM card and collecting this data could be used to identify if someone is in the area covered by the cell tower.