7-in-1 modem router design with VoIP, PBX & DECT
- Project Overview
Client
A company focused on software development for VoIP and digital PBX.
Challenge
Our client decided to enter the market with the new B2B product for small office/home office (SOHO).
They already had a software product for VoIP services but it behaved differently with different hardware. They needed to design their own device so not to depend on vendor-supplied chips and libraries.
Having no experience in hardware design, they chose Promwad as a technology partner with expertise and a trustworthy portfolio with telecom projects.
Solution
We have designed and prepared for mass production an advanced VoIP modem router that provides all types of office communications.
Our engineers designed an enclosure, hardware, low-level software, and Linux-based middleware, as well as stands for functional testing at the production site.
The new product included the functionality of seven devices in one:
- telephony with DECT base station, Asterisk-based VoIP gateway, and office PBX;
- Internet and local network via Ethernet, xDSL, WiFi, 3G, WiMax;
- connection with peripheral devices and operation of network storage (NAS).
Business Value
Our client received not only the 7-in-1 device but also one of the first modem routers with DECT base station on the market. It supported up to 6 handsets.
Another competitive advantage is the integration of a ready-made VoIP software of our client with his own hardware solution. As a result, he guaranteed his subscribers a stable operation of the equipment.
Thanks to the use of software components with open source code and Linux distribution, there are wide options for adapting and developing firmware for the device in the future.
The production volume of this B2B product has reached 20,000 units.
Project summary
During the project's implementation, Promwad specialists performed the following tasks:- Enclosure design and mechanical engineering
- Development of hardware and part of the software
- Manufacturing of prototypes
- Creation of test stands for functional testing
- Preparation for mass production
Building a Multi-Service Gateway Today?
A device like this one combines routing, telephony, storage, and remote management in a single box. Today, routers and modems are listed as important products under the EU Cyber Resilience Act, and US federal and critical-infrastructure buyers increasingly expect FIPS 140-3 cryptography. We design new gateways and routers with these requirements built in from the first schematic:- Secure boot and signed firmware updates with anti-rollback, delivered over authenticated channels
- Secure-by-default remote management (SSH, HTTPS, SNMPv3), with legacy services disabled unless explicitly required
- SBOM and CVE tracking for open-source stacks such as Linux, OpenWrt, and Asterisk
- FIPS 140-3-validated crypto integration for products sold into US federal and critical-infrastructure markets
Explore:1. Embedded security engineering →
2. Network infrastructure engineering →
- How It's Made
