Product Overview
The Huawei F656-21 is a fixed wireless terminal (FWT) designed to provide a gateway between a GSM/3G mobile network and a standard analog telephone. It allows users to make and receive calls using a regular landline phone connected to the device, leveraging a mobile SIM card. This device is ideal for eliminating traditional fixed telephone lines or for extending mobile network coverage to areas with weak signals, such as basements or elevators, by utilizing an external antenna.
It supports GSM 900/1800MHz and 3G/UMTS 900/2100MHz frequencies and is compatible with SIM cards from all mobile operators. The integrated 1500 mAh backup battery ensures continued operation during power outages.
Figure 1: Front and side view of the Huawei F656-21 3G GSM Link, showing its compact design and antenna.
Figure 2: Top view of the Huawei F656-21, displaying the Huawei logo and status indicators.
Figure 3: Rear view of the Huawei F656-21, showing the power input, two RJ11 ports for analog phones, a USB port (for data, not active), and an SMA connector for the external antenna.
Setup Guide
- Insert SIM Card: Locate the SIM card slot on the device. Carefully insert your activated SIM card, ensuring the correct orientation. If your SIM card has a PIN, it must be deactivated before insertion for the device to function correctly.
- Connect Antenna: Screw the provided 2G/3G antenna into the SMA connector on the back of the device. Ensure it is securely fastened. For improved signal reception in low-coverage areas, consider connecting a compatible external antenna.
- Connect Analog Phone: Use a standard RJ11 telephone cable to connect your analog fixed or cordless phone (or PBX system) to one of the two RJ11 ports (C1 or C2) on the back of the F656-21.
- Power On: Connect the power adapter to the device's power input and then plug it into a wall outlet. Press the power button to turn on the device.
- Wait for Network Registration: The device will attempt to register with the mobile network. Observe the status indicators (refer to the Operating section for indicator meanings). Once registered, you should hear a dial tone on the connected analog phone.
Operating Instructions
Making Calls
- Pick up the handset of the connected analog phone.
- Wait for the dial tone.
- Dial the desired phone number.
- The call will be routed through the GSM/3G network via the inserted SIM card.
Receiving Calls
- When an incoming call is received, the connected analog phone will ring.
- Pick up the handset to answer the call.
- Note: Incoming call number display (Caller ID) is only supported on analog phones with dual ID decoding capabilities (e.g., Doro Comfort 1010).
Status Indicators
| Indicator | Description |
|---|---|
| Power (⏻) | Solid Green: Device is powered on. Off: Device is off. |
| Network (⚙) | Solid Green: Registered to 3G network. Solid Blue: Registered to 2G network. Flashing: Searching for network or not registered. |
| Battery (🔋) | Solid Green: Battery charged. Flashing Green: Charging. Solid Red: Low battery. |
| Signal (📶) | Indicates signal strength (more bars = stronger signal). |
Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or aerosols.
- Battery Care: The integrated 1500 mAh battery provides backup power. For optimal battery life, avoid extreme temperatures and prolonged periods of full discharge or full charge.
- Antenna Placement: Ensure the antenna is positioned vertically and away from obstructions for best signal reception. If using an external antenna, place it in an area with optimal signal strength.
- Firmware Updates: Huawei may release firmware updates. Check the official Huawei support website for any available updates and follow their instructions carefully.
Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| No dial tone / Cannot make calls. |
|
| Cannot receive calls. |
|
| Poor call quality / Dropped calls. |
|
| Caller ID not displayed. |
|
Specifications
| Feature | Detail |
|---|---|
| Model | Huawei F656-21 |
| Network Frequencies | GSM 900/1800MHz, 3G/UMTS 900/2100MHz |
| SIM Card Support | Standard SIM (2FF), compatible with all mobile operators |
| Analog Phone Ports | 2 x RJ11 (for connecting analog fixed/cordless phones or PBX) |
| Antenna Connector | SMA (for detachable 2G/3G antenna) |
| Backup Battery | 1500 mAh (approx. 240 min talk time / 30h standby) |
| Operating System | Huawei Proprietary Firmware |
| Color | Black (as per product images) |
| Special Features | Remote access capability, can be used with anti-theft/security devices. |
Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your point of sale. Huawei provides support for its products. For technical assistance, firmware updates, or further inquiries, please visit the official Huawei support website or contact their customer service.
Manufacturer: HUAWEI
Model Number: F656-21
ASIN: B072FHYJ4M
