
2-301
Cisco Broadband Cable Command Reference Guide
OL-1581-08
Chapter 2 Cisco CMTS Configuration Commands
cable upstream docsis-mode
cable upstream docsis-mode
To configure an upstream to use either DOCSIS 1.x or DOCSIS 2.0 modulation profiles, use the
cable
upstream docsis-mode
command in cable interface configuration mode. To reset the upstream to its
default configuration, use the
no
form of this command.
cable upstream
n
docsis-mode
{
atdma
|
tdma
|
tdma-atdma
}
no cable upstream
n
docsis-mode
{
atdma
|
tdma
|
tdma-atdma
}
Syntax Description
Defaults
All upstreams are configured TDMA-only mode (DOCSIS 1.0/DOCSIS 1.1).
Command Modes
Interface configuration (cable interface only)
Command History
Usage Guidelines
The DOCSIS 2.0 specification provides support for advanced modulation profiles that increase potential
upstream bandwidth by building on the existing TDMA support. The Advanced TDMA profiles support
higher QAM rates up to 64-QAM and wider channel widths up to 6.4 MHz (5.12 Msymbols).
Note
The advanced hardware-based spectrum management features for the Cisco uBR-MC16S/U/X,
Cisco uBR-MC28U/X, and Cisco uBR-MC5X20S/U cards are supported only in the DOCSIS 1.0/1.1
TDMA-only mode. They cannot be used in the mixed or A-TDMA-only modes.
n
Specifies the upstream port. Valid values start with 0 for the first
upstream port on the cable interface line card.
atdma
Configures the upstream for DOCSIS 2.0 Advanced Time Division
Multiple Access (A-TDMA) modulation profiles only.
tdma
Configures the upstream for DOCSIS 1.0/DOCSIS 1.1 Time Division
Multiple Access (TDMA) modulation profiles only (default).
tdma-atdma
Configures the upstream for both A-TDMA and TDMA operation
(mixed mode).
Note
If using abbreviations at the command line, you must specify
at least “tdma-” to select mixed mode. If you choose a shorter
abbreviation, you select TDMA-only mode.
Release
Modification
12.2(15)CX
This command was introduced to support DOCSIS 2.0 A-TDMA and mixed
modulation profiles on the Cisco uBR-MC16U/X and
Cisco uBR-MC28U/X cable interface line card on the Cisco uBR7246VXR
router.
12.2(15)BC2
Support was added for the Cisco uBR-MC5X20S/U cable interface line
cards on the Cisco uBR10012 router.
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 ...