Installation guide

Cuda 12000 IP Access Switch Installation Guide
Application Modules 29
DOCSIS Modules
DOCSIS (Data Over Cable Service Interface Specification) modules interface
with your cable network and support automated registration of
DOCSIS-compliant cable modems. These modules currently support DOCSIS
1.0 and DOCSIS 1.1.
1x4 DOCSIS Module
The 1x4 DOCSIS module offers four upstream RF ports and a single
downstream RF port. The 4 upstream ports each provide up to a 10 Mbps
connection to hybrid fiber coaxial (HFC) cable and support both QPSK and
16 QAM modulation schemes within a frequency range of 5 to 42 MHz.
The single downstream port provides up to a 40 Mbps connection to your
HFC network and supports both 64 and 256 QAM modulation schemes
within a 93 MHz to 855 MHz frequency range. The downstream port is
compliant with ITU J83 Annex B FEC for 6 MHz channelization.
The module is connected to the network by installing a DOCSIS module
backplate on the selected slot, then cabled to the RF connectors attached to
the backplate. Cabling to the backplate and not to the module itself allows
you to remove and replace the module without re-cabling; it also allows you
to cable slots in advance. For information about installing a DOCSIS module
backplate, see “Backplates”on page 83.
These modules are hot-swappable; this means you can remove and replace
the modules with the system powered on and running.
Figure 1-5 shows a 1x4 DOCSIS module. For a description of each numbered
callout, see Table 1-2 on page 26.