A Coaxial Cable Home Network (CCHN) modem is a fundamental device, allowing access to fast and stable internet connectivity at home or in your office.
The Coaxial Cable Home Network Modem has several main functions designed for high-frequency signal transmission.
This article will thoroughly inform you about the Coaxial Cable Home Network Modem, from the definition, how it works, its various functions, and its technical compliance and type approval standards.
What is a Coaxial Cable Home Network Modem?
A coaxial cable home network modem is a device that connects users to an internet service provider (ISP) via a coaxial cable. This type of modem is commonly used in homes and offices to provide fast and stable internet access.
A coaxial cable itself is a medium designed to transmit high-frequency electrical signals, with a central conductor structure and a shielding layer that effectively counteracts electromagnetic interference.
How it Works?
A coaxial home network modem works by transmitting digital data through a coaxial cable from the internet service provider (ISP) to the modem in your home. Here are some of the CCHN modem processes that allow you to access the internet at high speeds:
ISP sends a signal: Radio frequency signals carrying digital data information are sent by the ISP over the coaxial cable network to your modem.
The modem receives the signal: The modem, which is connected to the coaxial cable in your home, receives the signal.
The modem converts the signal: The radio frequency signal is converted by the modem into a digital signal that your device (e.g., router or computer) can understand.
The data is sent to the device: The Ethernet cable then sends the digital signal to the router or other device, allowing your device to access the internet.
The Functions
The main function of a coaxial cable home network modem is to connect computer devices or local networks with the internet via coaxial cables. Here are some of the main functions of the CCHN modem:
1. Connecting to the Internet
One of the functions of a CCHN modem is to connect to the internet. This device acts as a link between home devices (e.g., computers, laptops, smartphones) and internet service providers (ISPs).
2. Expanding the signal
CCHN modems are usually assisted by MoCA (Multimedia over Coax Alliance) devices that can be used to utilize existing coaxial cables so that WiFi signals can be expanded and network speed increased.
3. As a modulation and demodulation device
Another important function of the CCHN modem is as a modulation and demodulation device. The CCHN modem converts digital signals from home devices into analog signals (radio frequencies) to be sent to the ISP, and demodulates analog signals from the ISP back into digital data.
4. Sharing public IP addresses on the internet
The modem assigns IP addresses to connected devices on the local network. By managing NAT (Network Address Translation), multiple devices can connect to local IP addresses to share one public IP address on the internet.
Technical Compliance and Type Approval Standards
The deployment of coaxial cable-based home network (CCHN) modems in commercial networks cannot be done haphazardly. The devices must comply with the technical regulations in effect in a given country.
To meet safety requirements, the devices must be tested and certified. This process is known as type approval certification. Generally, the testing process includes three categories: Radio Frequency (RF), Electromagnetic Compatibility (EMC), and Safety.
- Radio Frequency (RF) Performance: RF performance testing ensures that signal power levels remain stable and do not leak into unallocated spectrum channels.
- Electromagnetic Compatibility (EMC): EMC standards ensure there are no electromagnetic emissions that interfere with wireless systems or surrounding electronic devices.
- Safety: Electrical safety testing ensures that end-user locations are protected from power surges, lightning strikes, and electrical disturbances.
Certified devices are guaranteed to be safe and will not interfere with other devices when in use. Having type approval certification ensures smooth and unimpeded access to global markets.
