Guangdong, China
Business Type:
Manufacturer/Factory & Trading Company
Number of Employees:
Year of Establishment:
Plant Area:
1320 square meters
OEM/ODM Service
Sample Available
MEI Awards

4 SIM GSM FWT, GSM FWT, GSM FWT 4 Port manufacturer / supplier in China, offering GSM FWT 4 Ports 4 SIM for Telephone, 8 Ports FXS GSM Gateway, 8 Sims GSM Fixed Wireless Terminal with IMEI Changeable & Quadband, GSM Fixed Wireless Terminal with LCD Display for PBX /FXS Line/Billing System/VoIP FXO Gateway/Alarm System and so on.

Gold Member Since 2008
Audited Supplier

GSM FWT 4 Ports 4 SIM for Telephone

Purchase Qty. / Reference FOB Price
1-9 Pieces US $200
10-99 Pieces US $160
100+ Pieces US $140
Port: Shenzhen, China
Production Capacity: 10000PCS/Month
Payment Terms: T/T, Western Union, Paypal
Type: GSM
Usage: Telephone/PBX/Alarm System
Condition: New
Port No.: 4
Transport Package: Paper Carton
Specification: 2 kg per pcs

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Basic Info.

Model NO.
China Shenzhen
HS Code

1, General Description

GSM FWT ETS-4S is a newly designed 4 ports GSM to POTS (Plain Old Telephone Service) line Converter, also known as Fixed Wireless Terminal. The device has 4 line connections that allow 4 regular analog telephones to be connected to 4 Cellular GSM service just like connecting to 4 local PSTN (Public Switched Telephone Network) land-lines. Your calls are connected on the GSM network. This device receives and makes phone calls.

Model GSM FWT ETS-4S is 4 GSM modules + 4 FXS ports.

2, Installation and Connections

  1. The GSM FWT ETS-4S has to be in an area with a good GSM network coverage. Poor signal may affect the quality of the voice.
  2. Insert the SIM card into the SIM card holder at the back of the GSM FWT ETS-4S.
  3. Connect the antenna. In order to ensure a good quality of voice, it is recommended to locate the antenna at least 1.5m from the telephone and from the GSM FWT ETS-4S.
  4. Plug the RJ-11 cable to the back of the GSM FWT ETS-4S marked as FXS (1-4) and the other end to your telephone.
  5. Plug the Power Adapter to the wall power socket and its 12v plug to the Power (PWR) connector on the back of the GSM FWT ETS-4S.
  6. Your Telephone will ring twice when the GSM FWT ETS-4S has completed the boot process, it takes about 5 seconds.
  7. You can make and receive calls after you can hear the Dial Tone on the telephone and Network Signal indicator (GSM) is ON.

GSM FWT ETS-4S Connection Diagram

Back Side
FXS4 RJ11 POTS connectors,FXS to connect 4 Telephones or PBX
Power input12v from your Power Adapter
Antenna connection4 SMA Connector for the GSM antenna
LEDsLED indicators for status (see LED display explanation)
SIM card slot4 SIM card slots

LED Display
Power (red)Device Powered On indicator
FXS (orange)On when the FXS is in use
GSM(green)On when the talking is going on

 3, Functions & Features
  • Model Number: ETS-4S
  • Type: GSM (GSM FWT ETS-4S); 
  • Port Number: ETS-4S: 4 ;
  • SLIC(FXS): 4
  • SIM Card slot: 4
  • IMEI changeable: support
  • SMS management: support
  • lock network operator: support
  • Number transfer: support 
4. The digit dialing length establishment function, the user does not need in the digit dialing to join finally#The number may also realize the fast digit dialing
5. Number transformation function
6. Number Canada dials the function
7. The operator locks the function


4, Technical Specifications

Air interface standard: Quad band
                   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 

Module employed: Quectel M35
Phone interface: supply RJ-11 Phone Interface
Hanging voltage: 45V
Dialing tone Frequency: 450Hz
Antenna interface: Antenna amplifying >2.5db
RF Sensitivity: <-104DBM
Transmitting power: <3W

Operation temperature: -10c-60C
Storage temperature: -20C-70C
Operation humidity:            45% - 95%

Color: Black
AC-Adapter:  Input: AC 110~240VAC 50~60Hz
           Output: 12DC 1.5A.

AC-Adapter type: EU, US, AU, British (optional)
GSM FWT 4 Ports 4 SIM for Telephone
GSM FWT 4 Ports 4 SIM for Telephone


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