We've seen these used a lot in places where a copper line just isn't an option or would cost an arm and a leg to run, and basically what it does is take a standard GSM signal and turn it into a regular analog phone line for a desk phone or PBX—pretty straightforward solution for a specific problem.
It's got one SIM slot and two RJ-11 outputs, which is handy if you want to hook up a phone and an alarm panel or something like that, and the LCD display shows caller ID and signal strength on the front panel so you're not guessing if it's working.

The recieve sensitivity is down around -104dBm, which in most cases is fine for rural areas where the signal's weak, but it's not really suited for extreme fringe coverage where high-gain outdoor antenna would be mandatory, and that's just a fact of GSM terminal design—you'll want to check your signal first.
Talk time with the optional 7.2V 1000mAh Li-ion backup battery runs about 2.5 hours or so, standby's roughly 24 hours, so if the power goes out it'll keep a single line alive through the night, and that's something buyers don't always think to ask about until they need it.

We usually ship these out in 20 days or so, MOQ is typically 50 units, and you can get custom packging if you need it, though teh standdard unit comes with the SMA antenna adapter and a 12V 1A wall wart already in the box.
CE certified, one year warranty, and we do batch consistency checks on every production run so caller ID and DTMF dialing work the same across units—nobody wants a dud showing up halfway through a deployment.
We typically start at 50 units for a first order, but if you're testing the waters, we can negotiate a smaller sample batch. Just let us know your volume.
For stock orders, we ship within 7-10 business days. If you need a custom configuration or larger quantity, lead time extends to 3-4 weeks.
Yes, it's CE certified, and we can provide the certificate upon request. For other certifications like FCC, we'd need to discuss your target market.
It's designed for standard 2-wire analog phones via the RJ-11 ports. For 4-wire systems, you'd need an adapter — it's not natively supported.
We offer an optional 7.2V 1000mAh Li-ion battery that gives you about 24 hours standby or 2.5 hours talk time. It snaps in internally, so the unit stays compact.