Cisco uBR900 Series Configuring page 63

cable-modem upstream preamble qpsk
To enable the QPSK modulation scheme in the upstream direction from the cable access router
interface to the headend, enter the cable-modem upstream preamble qpsk command from
interface configuration mode. Use the no form of this command to disable upstream modulation for
the interface.
Syntax Description
This command has no arguments or keywords.
Defaults
Enabled
Command Modes
Interface configuration
Command History
Release
11.3 NA
Usage Guidelines
Examples
The following example shows how to enter the cable-modem upstream preamble qpsk command
for a cable access router interface, starting from global configuration mode:
cable-modem upstream preamble qpsk
no cable-modem upstream preamble qpsk
uBR924(config)# interface cable-modem 0
uBR924(config-if)# cable-modem upstream preamble qpsk
uBR924(config-if)#
Modification
This command was introduced.
Configuring the Cisco uBR900 Series Cable Access Routers 63
cable-modem upstream preamble qpsk