We're pleased to provide the following IP PBX and IP Telephony related services.


- IP PBX setup service according to your requirement

- SIP Trunk setup service (Termination/Origination)

- Global Phone Number Provision (Landline/Mobile)

- Managed service, or Turnkey setup service


                              > IP PBX Telephony System Explained <



What are SIP Trunks?

A SIP trunk is the modern day equivalent of a T1 trunk. Where in the past you would buy a T1 trunk from a Telco provider and connect it to your legacy PBX, today you can buy a SIP trunk from an ITSP (Internet Telephony Service Provider) and connect it to your VoIP/IP PBX. SIP trunks use the SIP standard. The name ‘trunk’ comes from the telecom world and it means, more or less, a group of phone lines.

Using this standard protocol, telecom service (VoIP) providers connect one or more channels to the customer’s PBX. Phone numbers and DIDs are linked to the SIP trunk. In many cases numbers can be ported to the SIP Trunk.

Benefits of SIP Trunking

Our farewell to the PSTN brings many benefits. SIP Trunks deliver:

    • Lower monthly Line & DID Rental – The monthly fee to have a number of lines installed at your office drops significantly with SIP Trunks. And DIDs cost a lot less.
    • Lower call charges – There are many SIP Trunk providers and competition has driven down call charges significantly. Some SIP Trunks even come with unlimited calling and you can save on international call charges, too.
    • Better customer service – Provide better customer service by adding more geographical and international numbers. Quickly and easily add numbers to your SIP Trunk and terminate them on your IP PBX – you can give customers more options to dial in at a significantly lower cost, even long distance. Customers can contact you more easily and sales will increase.
    • Move offices and keep the same number – SIP Trunks are not bound to a location, so it’s easy to move offices without having to change your stationary or inform your customers. There is no longer any need to pay to forward phone calls to the new offices.
    • Eliminate VoIP Gateways – SIP Trunks will eliminate the need to buy and manage VoIP Gateways. All phone calls come in via IP. No extra conversion often means better quality too.
    • Leverage a modern IP PBX – Modern IP PBX / Unified Communications solutions will give customers increased productivity, mobility and boost sales. Connecting an IP PBX to SIP Trunks is much easier than via the PSTN. You can go on-premise or hosted, the choice is yours.
    • Flexibility – It is easy to add channels to your SIP Trunk to cope with increased calls. A simple phone call will allow you to add channels, and often this can be done immediately. Compare that to the delay in having additional lines installed and then having to upgrade your old PBX to handle more lines!
    • Correct number of channels – With SIP Trunks, you can easily choose the correct number of channels that you need.



ComNetwork Co., Ltd. is an official partner of 3CX phone system! 3CX is a Global Leader in IP PBX markets! Below are the lists of major corporations using 3CX IP PBX system.


If you have any further queries, please contact us at your convenience.


Direct Contact for Global Inquiries;

Korea      : +82-10-7211-7914

Germany : +49-69-17554724

United States : +1-336-444-6998

For Whatsapp Communications;

U.K : +44-7717-456982 








Information about Global Shutter Camera vs. Rolling Shutter Camera



Main Application Field of Global Shutter Camera :

ITS (Intelligent Transportation System)

FA (Factory Automation)

MV (Machine Vision)



ComNetwork Global Shutter Camera (without Lens)





ComNetwork Global Shutter Camera (with Zoom Lens)





Are you sure that your IoT devices on your network is really secure?

If you're not sure about your IoT device security, we have the solution for you!

AI-driven IoT surveillance is a genuine answer for your IoT network security with simple and easy application without knowing complicated network things.


Security threats in the era of IoT are directly connected with daily life, property, and life.

DDoS and other network security accidents, IP camera hacking and other crimes in the home, and hijacking medical devices can also threaten life.


What is AI-driven IoT surveillance exactly?

AI-driven IoT surveillance is an IoT device security surveillance, monitoring and management solution with a built-in security module on AI server, being responsible for IoT security in various smart industrial areas. Not only known vulnerabilities (CVE), unknown vulnerabilities (Zero-day) can be found in advance.

It is a brand new conceptional AI-driven IoT management solution.


Get me the examples where AI-driven IoT surveillance can be applied!

Sure! As there are numerous applicable examples, we hereby give you the most common network security diagnosis to be done by AI-driven IIoT/IoT surveillance.

Firstly you may think of Connected Cars! In the black box form, it can be mounted on the car for wireless communication area security such as Wi-Fi, Bluetooth in ECU, IVI area.

Healthcare is another important part of personal security. 

AI-driven IIoT/IoT surveillance solution can be mounted on the wearable device to prevent personal health data leakage and manipulation, providing reliable healthcare service.

You can think of Smart Building as well. This will bring the improved security of home and corporate environment by installing AI-driven IIoT/IoT surveillance integrated AP module in Smart Building.

Smart communication is no exception. AI-driven IIoT/IoT surveillance can be installed in mobile communication device, enabling easy management of IoT security status from home and business.

Consequently you may reach Smart Home Security solution with AI-driven IIoT/IoT surveillance.

i.e. Home network security, Smart TV security, External Intrusion security, Smart Refrigerator security, Home CCTV security, Temperature Control Equipment security etc. etc. You name it!



What is an Ethical Hacker Emailing Service?

This is a kind of hacking email training process service for employees, or for any members in any organization. It is a training solution that prevents damages and improves security awareness by sending a "mock malicious email" similar to a real situation.


Why do we need this service?

Due to increasing number of cyber attacks and damages (i.e. phishing, ransomware etc.), this kind of hacking email training service will enhance your company's cyber attack countermeasures.


How is your service executed?

Please refer to the below flow chart explanation.