DOCSIS
Data over cable service interface specification (DOCSIS) includes a number of related standards, also referred to as EuroDOCSIS and US DOCSIS. This technology allows interactive data traffic and communication via upstream and downstream capabilities using IP data traffic.
Based on the existing upstream and downstream channels, this data traffic is a further development of unidirectional cable networks and is used in different versions:
- DOCSIS 1.0 /2.0 /3.0
- EuroDOCSIS 1.0 / 2.0 / 3.0
Taking into account regional frequency plans and the channels bandwidths used, the different DOCSIS versions have been adapted to Europe (with 8 MHz and starting at 108 MHz) and North America (with 6 MHz and starting at 88 MHz).
Deployment Scenario
DOCSIS is utilized in cable networks; by offering upstream and downstream capabilities, the standard allows interactive communication. Typical TV transmission was previously provided in unidirectional cable networks and is now complemented by new technologies such as Internet access and telephony (voice over IP). Scenarios of this kind are therefore also called triple play. DOCSIS is mainly used in the USA and Europe.
The network infrastructure is set up with a cable modem (CM) at the customer premises and a cable modem termination system (CMTS) at the headend.
-->Standardization
DOCSIS has been standardized under DOCSIS 1.0, 1.1, 2.0, and by the ITU-T as J.112 Annex B. DOCSIS 3.0 is documented in ITU-T Recommendation J.222 (J.222.1J.222.2J.222.3).
DOCSIS 1.0 and 2.0 are described under ETSI ES 201 488 and ES 202 488.
