The data
rate in each direction can be configured with a granularity of 1bps in order to meet
the demands of the application. In addition, data rates can be changed dynamically,
without replacing equipment and without service outage. A service-level agreement
can even be defined such that the configured data rate varies by time-of-day or by dayof-
week in order to best meet the customer??™s needs.
As described previously, the DOCSIS 3.0 specification extends the bandwidth available
to a cable modem in a scalable way, up to a maximum possible data rate of 176 Mbps in
the upstream direction (384 Mbps in certain plant configurations) and 4.8 Gbps in the
downstream direction, with initial DOCSIS 3.0 equipment expected to support data rates
up to 120 Mbps upstream and 155 Mbps downstream.
Reliability Reliability features, such as hitless failover and hot-swappable line cards,
are available from all CMTS vendors in their carrier-class equipment offerings. The
DOCSIS standard does not place any mandatory requirements on such features.
The DOCSIS standard does specify the behavior of a cable modem when it detects that
it has lost connectivity.
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