Etross 8848 GSM Gateway fixed wireless terminal with Sim Slot

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.
The main application is: connecting the RJ-11 FXS line to connect ordinary telephone set for voice call, to connect PBX for call extensions, to connect billing systems for public phone use, to connect VoIP gateway to realize VoIP call termination, to connect alarm system for security purpose and more. It is not a VOIP gateway, nor a GSM+VOIP gateway, it is a GSM fixed wireless terminal that produces a Analog FXS phone line.

Connecting with phones, VOIP gateway, PBX system, alarm system, billing device:

Advantages:
1)Strong signal
2)IMEI changeable
3)SIM card supported (1.8V, 3V)
4)Supports DTMF 2nd dialing out
5)Locking PIN/network (optional)
6)Hides subscriber ID (been sent out)
7)Backup Lithium-ion battery(optional)
8)Connects alarm systems for security use
9)Provides reversal polarity signal for metering
10)Compatible to most telephones, PBX and VoIP gateways
11)Provides optimized circuit connecting the exchange device for extension

Specifications:
1) Air interface standard: GSM850/1900MHz,900/1,800MHz phase 2+ full band
2) 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
3) Channel space: 200kHz
4) Max power: 0.25W/0.5W
5) Consumption:
A) Immobility: <25mAh
B) Transmission: <400mAh
6)Input: AC100 – 230V, 50/60Hz
7)Output: 12V 1A
8) Sensitivity: -105dB
9) AC power: DC 10V – 20V
10) Dial tone frequency: 450MHz (standard)
11)Connector of power: US or European type

Operation circumstance:
Operation temperature: -10°C-60°C
Storage temperature: -20-70°C
Operation humidity: 45%-95%
Atmosphere pressure: 86-106Kpa
Environment noise: <60dB