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Cisco Broadband Cable Command Reference Guide
OL-1581-07
Chapter 6 Cable CPE Commands
cable-modem upstream preamble qpsk
cable-modem upstream preamble qpsk
To enable the QPSK modulation scheme in the upstream direction from the cable interface to the CMTS,
use the
cable-modem upstream preamble qpsk
command in cable interface configuration mode. To
disable upstream modulation for the interface, use the
no
form of this command.
Cisco uBR904, uBR905, uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
cable-modem upstream preamble qpsk
no cable-modem upstream preamble qpsk
Syntax Description
This command has no arguments or keywords.
Defaults
Enabled
Command Modes
Interface configuration (cable interface only)
Command History
Examples
The following example shows how to configure the cable interface for QPSK modulation on the
upstream:
Router(config)#
interface cable-modem 0
Router(config-if)#
cable-modem upstream preamble qpsk
Router(config-if)#
Related Commands
Release
Modification
11.3(4)NA
This command was introduced for the Cisco uBR904 cable access router.
12.0(4)XI1
Support was added for the Cisco uBR924 cable access router.
12.1(3)XL
Support was added for the Cisco uBR905 cable access router.
12.1(5)XU1
Support was added for the Cisco CVA122 Cable Voice Adapter.
12.2(2)XA
Support was added for the Cisco uBR925 cable access router.
Command
Description
cable-modem compliant bridge
Enables DOCSIS-compliant transparent bridging for the cable
interface at startup.
cable-modem downstream
saved channel
Modifies the saved downstream channel setting and upstream power
value on the cable interface.
cable-modem fast-search
Enables a faster downstream search algorithm on the cable
interface.
cable-modem voip best-effort
Allows voice calls to be sent upstream over the cable interface via
best effort.
Содержание Broadband Cable
Страница 760: ...3 264 Cisco Broadband Cable Command Reference Guide OL 1581 08 Chapter 3 Cisco CMTS Show Commands show version ...
Страница 1216: ...6 214 Cisco Broadband Cable Command Reference Guide OL 1581 07 Chapter 6 Cable CPE Commands debug usb ...
Страница 1266: ...A 50 Cisco Broadband Cable Command Reference Guide OL 1581 07 Appendix A Using the ROM Monitor unset ...