Cisco 7246 - uBR Router Manuel d'utilisateur télécharger pdf (Page 19)

cable modulation-profile

Cisco uBR7246 Universal Broadband Router Feature Enhancements 19

cable modulation-proﬁle

To deﬁne the modulation proﬁle, use the cable modulation-proﬁle global conﬁguration command.

Use the no form of this command to remove the speciﬁed modulation proﬁle.

cable modulation-proﬁle proﬁle iuc fec-tbytes fec-len burst-len guard-t mod scrambler seed diff

pre-len last-cw uw-len

no cable modulation-proﬁle proﬁle iuc fec-tbytes fec-len burst-len guard-t mod scrambler seed

diff pre-len last-cw uw-len

Syntax Description

Default

No default behavior or values.

Command Mode

Global conﬁguration

proﬁle Modulation proﬁle number.

iuc Interval usage code. Valid entries are: initial, long, request,

short, or station.

fec-tbytes The number of bytes that can be corrected per FEC code word.

Valid values are from 0 to 10, where 0 means no FEC.

fec-len FEC code word length. Valid values are from 16 to 253.

burst-len Maximum burst length in minislots. Valid values are from 0 to

255, where 0 means no limit.

guard-t Guard time in symbols. The time between successive bursts.

mod Modulation. Valid entries are 16qam and qpsk.

scrambler Enable or disable scrambler. Valid entries are scrambler and

no-scrambler.

seed Scrambler seed in hexidecimal format. Valid values are from

0x0000 to 0x7FFF.

diff Enable or disable differential encoding. Valid entries are diff and

no-diff.

pre-len Preamble length in bits. Valid values are from 2 to 128.

last-cw Handling of FEC for last code word. Valid entries are ﬁxed for

ﬁxed code word length and shortened for shortened last code

word.

uw-len Upstream unique word length. Enter uw8 for 8-bit unique words

or uw16 for 16-bit unique code words.

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Cisco 7246 - uBR Router Manuel d'utilisateur Page 19