• Who sets the DOCSIS standards?
• What modulation methods are possible with DOCSIS?
• What are the differences between DOCSIS 1.0 and 1.1?
• Which modems are Certified by CableLabs?
• What are the DOCSIS version specifications?

CableLabs is an industry consortium that sets the standards for DOCSIS compliance.

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by wheelert$93 edited by big greg
last modified: 2005-08-01 08:20:22

On the downstream side either 64QAM or 256QAM is possible, with 256QAM being the usual case. Both occupy 6MHz of spectrum.

On the upstream either QPSK or 16QAM may be employed with 200Khz, 400KHz, 800KHz, 1.6MHz, or 3.2MHz of spectrum being used.

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by wheelert$93 edited by big greg
last modified: 2005-07-31 11:52:31

DOCSIS 1.1 builds upon 1.0, but also includes the following features:

Quality of Service
Dynamic Services
Concatenation
Fragmentation
Payload Header Suppression
IP Multicast
CM Authentication
SNMP v3
View-based access control and management (VACM)
CM Account Management
Fault Management
Secure Software

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by VindictiV edited by big greg
last modified: 2005-07-31 11:54:05

CableLabs maintains the list of modems that are compatible with DOCSIS®, CableHome® and PacketCable™ specifications.

The Certified Modem List is a large PDF file.

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by VindictiV edited by big greg
last modified: 2005-08-01 08:14:41

Currently, there are 3 different version specifications for DOCSIS. DOCSIS 1.0, 1.1 2.0 and 3.0. DOCSIS standards are set by CableLabs »www.cablelabs.com

The most common implementation is DOCSIS 2.0, with 3.0 being adopted quickly.

For details on the different CableModem/DOCSIS specs, please see »www.cablemodem.com/ and »www.cablemodem.com/specifications/index.html

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by VindictiV edited by 2kmaro
last modified: 2010-12-05 09:33:59