SHENZHEN SUNCOMM INDUSTRIAL CO., LTD.
SHENZHEN SUNCOMM INDUSTRIAL CO., LTD.

Small 4G Routers: Why VoIP Still Matters

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    It seems like we need to stay online wherever we go these days. That means those little 4G routers are doing more than just getting us on the internet. A lot of companies still need to make reliable phone calls, mostly if they can't get regular phone lines.

    That's why those little 4G routers that let you make calls can really come in handy.

    Let's check out how one of these compact 4G routers with voice actually works. We'll use the SUNCOMM SV728 as our example.

     

    SV728.jpg


    Why Voice Still Counts

    Even with all the ways we chat online these days, phone calls are still important in lots of situations:

    Stores

    Temporary offices and construction sites

    Homes and small businesses

    International projects and mobile workplaces

     

    Getting regular phone lines to these places can be hard, slow, or costly. A small 4G router with voice lets people use the internet and make calls using just one device.

     

    How It Works

    Routers manage voice calls mainly through:

    VoIP, or Voice over IP, turns your voice into digital data and sends it over the internet. Think of it as making a phone call, but using the internet instead of a traditional phone line.

    VoLTE, short for Voice over LTE, uses your phone's normal calling feature but runs it through the 4G network. Usually, this means calls sound clearer and connect faster.

    You can expect super clear voice quality with VoLTE, even if you're only on 4G.

     

    VoIP2.jpg


    A Real Example: SUNCOMM SV728

    The SV728 is a small 4G router that's made for homes and small businesses. It's simple, reliable, and has voice calling built-in.

     

    Here are some things it can do:

    Connect to 4G networks for internet access

    Work with lots of different 4G bands around the world

    Provide Wi-Fi for your devices

    Small and easy to carry around

    Has a port for plugging in a regular phone for voice calls

    Uses external antennas to get a better signal

    The SV728 puts data and voice into one small device, which makes it easier to set up and saves space.

     

    Where These Routers Can Be Used Small routers with voice are great for:

    Stores: Easy to set up and manage voice calls from one place

    Temporary sites: Internet and phone service without needing phone lines

    Home backup: A way to make calls when your internet goes out

    International projects: Use local SIM cards to make calls

    With voice built into the router, you don't need extra equipment to make calls.

     

    VoIP.png


    Important Info About Voice Testing

    Different countries have different rules about phone services.

    In China, you need a special license to use VoIP. Because of this, SUNCOMM doesn't test VoIP features in China.

    All the testing for voice features on products like the SV728 is done outside of China, in places like France. The products are made for overseas markets and follow the rules there.

    Following the rules is very important.

    SUNCOMM's View: Voice Is Key

    SUNCOMM believes that voice calling is a core part of what a router should do.

    That a router with voice should have:

    Stable call quality, even when the network isn't perfect

    Good handling of data traffic while you're on a call

    Work with popular phone platforms

    Be reliable for a long time

     

    Even in a small 4G device, these things are important.

    As routers get better, voice will always be a key feature, especially where people need to be mobile, flexible, and quick to set up.

    A small 4G router with voice calling is more than just a way to get online. It's a full communication solution in one small box.

    For businesses that work in other countries, devices like the SV728 show how data and voice can work together without being complicated.

    For SUNCOMM, finding the right balance between being useful, following the rules, and working well in the real world is what makes a product great.


    Arthur Cui
    Arthur Cui

    Arthur Cui is the Product Marketing Manager at SUNCOMM Shenzhen. He bridges technology and market insights, turning complex router innovations into clear value for customers worldwide. Passionate about 5G and future connectivity trends, Arthur enjoys sharing stories that make tech both professional and relatable.

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