1. Ievads
The ARRIS CM820A Cable Modem is designed to provide ultra-high-speed data access for cable service subscribers in both home and business environments. Utilizing DOCSIS 3.0 technology, this modem supports 8x4 bonded channels, enabling data services at speeds exceeding 300Mbps. It offers reliable and high-performance internet connectivity, making it suitable for advanced users and competitive against alternative broadband technologies.
2. Iepakojuma saturs
Pārliecinieties, vai iepakojumā ir visi priekšmeti:
- ARRIS CM820A Cable Modem
- Strāvas adapteris
- Ethernet kabelis
- Īsā lietošanas pamācība (nav iekļauta šajā rokasgrāmatā)
3. Produkts beidziesview
3.1 Priekšējā paneļa indikatori
The front panel of the ARRIS CM820A features several LED indicators that provide status information about the modem's operation. Refer to the image below for the location of these indicators.

1. attēls. Priekšpuse view of the ARRIS CM820A Cable Modem. Visible indicators include Power, DS (Downstream), US (Upstream), Online, and Link.
- Jauda: Norāda, ka modems saņem strāvu.
- DS (lejupstraume): Indicates downstream channel connectivity.
- ASV (augšupstraume): Indicates upstream channel connectivity.
- Tiešsaistē: Indicates successful internet connection.
- Saite: Indicates an active Ethernet connection to a device.
3.2 Aizmugurējā paneļa porti
The rear panel contains all the necessary ports for connecting the modem to your cable service and network devices.

2. attēls. Aizmugure view of the ARRIS CM820A Cable Modem. Ports include a coaxial cable connector, an Ethernet port, and a power input.
- COAX: Connects to the cable wall outlet.
- ETHERNET: Izveido savienojumu ar datoru vai maršrutētāju, izmantojot Ethernet kabeli.
- JAUDA: Savieno ar strāvas adapteri.
4. Iestatīšanas instrukcijas
Follow these steps to set up your ARRIS CM820A Cable Modem:
- Pievienojiet koaksiālo kabeli: Connect one end of the coaxial cable to the COAX port on the modem and the other end to a cable wall outlet. Ensure the connection is finger-tight.
- Pievienojiet Ethernet kabeli: Connect one end of the Ethernet cable to the ETHERNET port on the modem and the other end to your computer's Ethernet port or to the WAN/Internet port of your router.
- Pievienojiet strāvas adapteri: Connect the power adapter to the POWER port on the modem and then plug the adapter into an electrical outlet.
- Ieslēgšana: The modem will automatically power on. Observe the front panel LEDs. The Power, DS, US, and Online indicators should eventually become solid green, indicating a successful connection. This process may take several minutes.
- Aktivizēt pakalpojumu: Contact your Internet Service Provider (ISP) to activate your new modem. You will need to provide the MAC address of the modem, which is typically found on a label on the bottom or back of the device.
- Pārbaudiet savienojumu: Once activated, open a web browser on your connected device and attempt to access a website to confirm internet connectivity.
5. Modema lietošana
The ARRIS CM820A Cable Modem operates continuously once connected and activated. It functions as a bridge between your home network and your Internet Service Provider's network.
- Nepārtraukta darbība: For optimal performance, it is recommended to leave the modem powered on at all times.
- Indikatora gaismas: Monitor the front panel LEDs to quickly assess the modem's status. Solid green lights for Power, DS, US, and Online indicate normal operation.
- Ierīču pievienošana: You can connect a single computer directly to the modem via Ethernet. For multiple devices or wireless connectivity, connect a router to the modem's Ethernet port.
6. Apkope
Proper maintenance ensures the longevity and optimal performance of your cable modem.
- Ventilācija: Ensure the modem is placed in a well-ventilated area to prevent overheating. Do not cover ventilation openings.
- Tīrīšana: Clean the modem periodically with a soft, dry cloth. Avoid using liquid cleaners or aerosols.
- Jaudas riteņbraukšana: Ja rodas savienojamības problēmas, vienkārša ieslēgšana/izslēgšana (strāvas adaptera atvienošana uz 10–15 sekundēm un pēc tam pievienošana) bieži vien var atrisināt nelielas problēmas.
- Kabeļu savienojumi: Periodically check that all cable connections (coaxial, Ethernet, power) are secure.
7. Traucējummeklēšana
This section addresses common issues you might encounter with your ARRIS CM820A Cable Modem.
7.1 Nav jaudas
- Simptoms: Barošanas gaismas diode ir izslēgta.
- Risinājums: Pārliecinieties, vai strāvas adapteris ir droši pievienots modemam un darbojošai elektrotīkla kontaktligzdai. Izmēģiniet citu kontaktligzdu.
7.2. Nav interneta savienojuma
- Simptoms: Online LED is off or blinking.
- Risinājums:
- Verify coaxial cable connection to the wall outlet and modem.
- Power cycle the modem: unplug, wait 15 seconds, plug back in.
- Ensure your service is activated with your ISP.
- If using a router, power cycle the router as well.
- Contact your ISP if the issue persists.
7.3 Lēns interneta ātrums
- Simptoms: Internet speed is lower than expected.
- Risinājums:
- Power cycle the modem and any connected router.
- Pārliecinieties, vai visi kabeļi ir droši pievienoti.
- Temporarily connect a computer directly to the modem with an Ethernet cable to rule out router issues.
- Run a speed test. If speeds are consistently low, contact your ISP.
8. Specifikācijas
Key technical specifications for the ARRIS CM820A Cable Modem:
| Funkcija | Detaļas |
|---|---|
| Zīmols | ARRIS |
| Modeļa numurs | FBA_P-10-20521 |
| DOCSIS versija | 3.0 |
| Kanālu savienošana | 8x4 (Downstream x Upstream) |
| Savienojamības tehnoloģija | Vadu |
| Ethernet porti | 1 gigabaitu Ethernet ports |
| Izmēri (LxWxH) | 7 x 7 x 2 collas |
| Svars | 0.01 unces |
| Saderīgi interneta pakalpojumu sniedzēji | Cox, Optimum, Spectrum, Xfinity (Compatibility may vary, confirm with ISP) |
9. Garantija un atbalsts
Lai saņemtu informāciju par garantiju un tehnisko atbalstu, lūdzu, skatiet pirkumam pievienoto dokumentāciju vai apmeklējiet oficiālo ARRIS vietni. webvietne. Garantijas noteikumi parasti attiecas uz ražošanas defektiem noteiktā laika periodā no iegādes datuma.
- Ražotāja atbalsts: Contact ARRIS customer support for assistance with product issues, setup, or troubleshooting beyond this manual.
- ISP Support: For service activation, billing, or network-related issues, contact your Internet Service Provider directly.





