Arris CM820A
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				| Ultra-High Speed Cable Modem | |
| 
 | |
| Support | Support page | 
|---|---|
| WikiDevi.wi-cat.ru | Arris CM820A | 
| 3rd Party Firmware | |
| dd-wrt | Status Unknown | 
| OpenWrt | Status Unknown | 
| Tomato any flavor | Incompatible | 
| Platform | |
| Brand • Model • Rev | Arris CM820 A (B/C/S) | 
| Type | cable modem | 
| CPU1  | Intel Puma DNCE2500 | 
| CPU1 Type | ARMv6 ARMv6TEJ | 
| CPU1 Speed | not specified ( 2 cores ) | 
| Flash1 Chip | Brand? Model? | 
| Flash1 Size | 16 MiB 16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br /> | 
| RAM1 Size | 128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br /> | 
| RAM1 Chip | Brand? Model? | 
| ETH chip1 | Intel Puma DNCE2500 | 
| ETH chip2 | Marvell Model? | 
| Cable Modem Spec | DOCSIS 3.0: (8 x 4) | 
| Ethernet Port Count | 1-1GbE-LAN | 
| Wired Standard | IEEE 802.3i/3u/3ab | 
| Expansion IF types | none specified | 
| Power | 115-240 VAC ~ 50/60 Hz, 0.3 A | 
| Connector type | C7P | 
| 
 Flags:  | |
| 
 | |
| 
 | |
| Retail | |
| Availability | Comcast | 
| (Est.) release date | 30 June 2012 | 
| UPC | 
726947110717  (UPC DB, On eBay)  | 
| ASIN | 
B008GG78FU  | 
For a list of all currently documented Intel Puma SoC's with specifications, see Intel Puma.
For a list of all currently documented Marvell chipsets with specifications, see Marvell.
For a list of all currently documented Arris devices with specifications, see Arris.
Overview
- DOCSIS 3.0 8x4 (8-downstream, 4-upstream)
 
Variants
- CM820A - DOCSIS 3.0 (Comcast)
 - CM820B / CM820S - EuroDOCSIS 3.0 / DOCSIS 3.0
 - CM820C - DOCSIS 3.0 (Japanese)
 
There would appear to be multiple revisions of this device.
- Some seem have a polarized power connector (C7P),
 - others have a non-polarized Fig-8 connector (C7).
 
Likely compatible services
Links of Interest
News
- On Comcast (SNE)
 - On DSLReports (spec.)
 
- CPU: Intel Puma DNCE2500 (DNCE25xx)