In modern enterprise and Fixed Wireless Access (FWA) deployments, routers are no longer just “internet boxes.” They are evolving into communication hubs that integrate data, voice, and intelligent services. Among these capabilities, VoIP and VoLTE stand out as the two most transformative voice technologies embedded in today’s cellular routers.
At SUNCOMM, we view voice not as an add-on, but as a core function of next-generation network infrastructure. This article explains how VoIP and VoLTE work inside routers, what real-world value they deliver, and how we approach these technologies in a compliant, global-ready way.
VoIP (Voice over IP) is all about turning your voice into digital data and sending it over the internet.
A router with VoIP inside usually has:
l Phone jacks (RJ11)
l SIP tech
l Audio tech (G.711, G.729, Opus, etc.)
l Tools to cut down on echo and keep the call smooth
Here's how it works in simple terms:
1. You plug in a regular phone.
2. The router turns your voice into data.
3. The router connects to a SIP server.
4. Your voice is sent as data over the internet.
5. The other end turns the data back into sound.
This setup has some great perks:
l No need for old-school phone lines
l Voice and data use the same network
l Easy to manage and set up from anywhere
l Quick to get up and running
For stores, hotels, apartments, and small offices, a single 4G/5G router can handle both internet and phone service – making things simpler and cheaper.
VoLTE (Voice over LTE) is different from VoIP.
Instead of using the internet, VoLTE:
l It uses the cellular network through the operator's IMS core.
l It offers voice service.
With VoLTE-ready routers:
l Calls stay on the operator's 4G/5G network
l No need to switch to older 2G/3G networks
l Calls connect faster * Better sound quality (HD Voice)
l You can still use data while on a call
This is great for:
l 5G devices and industrial routers
l Mobile and remote setups
l Backup phone lines for businesses
Basically:
l VoIP is flexible and works with the cloud
l VoLTE is reliable and offers great cellular performance
Both are important for today's routers.
With VoIP and VoLTE, routers become complete communication hubs:
Chain Stores: Simple networking and phone setup, easy to manage
Temporary Spots: Quick voice and data for events, construction, or emergencies
Projects Abroad: Use a local SIM and router for an instant office, cutting down on calling costs
From what we've seen with SUNCOMM customers, one thing is clear:
Companies want one system for both data and voice.
Different countries have different rules for phone services.
SUNCOMM takes these steps:
l Our VoIP testing is done in France.
l Products are made for other countries and follow their rules.
This is part of our work. Tech skills and following the rules go together.
In our French lab, SUNCOMM engineers:
l Test how stable calls are over time
l Check if different audio types work
l Look at how well SIP works
l Test in weak signal situation
l Analyze how voice quality is under a heavy data load
These tests help us improve:
l Call delay
l How well we fix lost data
l Echo control
l How well voice and data work at the same time
We want voice in a router to be top-notch.
With 5G and edge computing getting popular, voice will be the start of smart services:
l Voice assistant
l Cloud based communication
l Control IoT with voice
At SUNCOMM, VoIP and VoLTE are a base that let routers change from network devices into:
Smart hubs for people, devices, and services.
If you're building network solutions overseas or FWA systems, voice is key.
That's why SUNCOMM keeps investing in it.
