Cisco SR2016T-NA Reference Manual page 302

cable upstream channel-width
cable upstream channel-width
To specify an upstream channel width for an upstream port, use the cable upstream channel-width
command in cable interface configuration mode. To set the channel width back to the default setting of
1,600,000 Hz, use the no form of this command.
Syntax Description n
first-choice-width
last-choice-width
Defaults first-choice-width defaults to 1,600,000 Hz, last-choice-width defaults to 1,600,000 Hz for those cable
interface line cards that support it
Command Modes
Interface configuration (cable interface only)
Cisco Broadband Cable Command Reference Guide
2-290
cable upstream n channel-width first-choice-width [last-choice-width]
no cable upstream n channel-width
Specifies the upstream port number. Valid values start with 0 for the
first upstream port on the cable interface line card.
Specifies upstream channel width in hertz (Hz). Valid values for all
cards are:
200,000 (160,000 symbols/sec)—Not valid when using
•
Unsolicited Grant Service (UGS) or UGS with Activity Detection
(UGS-AD) service flows (such as PacketCable voice calls)
400,000 (320,000 symbols/sec)
•
800,000 (640,000 symbols/sec)
•
1,600,000 (1,280,000 symbols/sec)
•
3,200,000 (2,560,000 symbols/sec)
•
The Cisco uBR-MC5X20S/U, Cisco uBR-MC16U/X, and
Cisco uBR-MC28U/X cards also support 6,400,000 Hz
(5,120,000 symbols/sec) when operating in DOCSIS 2.0
(A-TDMA-only) mode.
(Cisco uBR-MC16S, Cisco uBR-MC16U/X, Cisco uBR-MC28U/X,
and Cisco uBR-MC5x20S/U only) The upstream channel width in
hertz. The valid values are the same as those for the first-choice-width
parameter, but for proper operation, the last-choice-width should be
equal to or less than the first-choice-width value. Use this parameter
with supported cards to enable symbol rate management algorithms.
The symbol rate automatically steps up from the first-choice-width
value to the highest value until a stable channel is established.
The last-choice-width argument is applicable only to the
Note
Cisco uBR-MC16S, Cisco uBR-MC16U/X,
Cisco uBR-MC28U/X, and Cisco uBR-MC5X20S/U cards.
Chapter 2 Cisco CMTS Configuration Commands
OL-1581-08