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.

Even with all the ways we chat online these days, phone calls are still important in lots of situations:
l Stores
l Temporary offices and construction sites
l Homes and small businesses
l 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.
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.

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:
l Connect to 4G networks for internet access
l Work with lots of different 4G bands around the world
l Provide Wi-Fi for your devices
l Small and easy to carry around
l Has a port for plugging in a regular phone for voice calls
l 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:
l Stores: Easy to set up and manage voice calls from one place
l Temporary sites: Internet and phone service without needing phone lines
l Home backup: A way to make calls when your internet goes out
l International projects: Use local SIM cards to make calls
With voice built into the router, you don't need extra equipment to make calls.

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 believes that voice calling is a core part of what a router should do.
That a router with voice should have:
l Stable call quality, even when the network isn't perfect
l Good handling of data traffic while you're on a call
l Work with popular phone platforms
l 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.