Chapter 21: Integrated Upstream Agility
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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machines to be defined within a single C4/c CMTS.
state_ID is a pointer to a state defined within the state machine <SM_ID>. This is an integer value between 1 and 16.
The SM_ID and the state_ID taken together uniquely specify a state within the C4/c CMTS.
center_freq is the center frequency for the upstream channel associated with this state, in Hertz. This value must be a
real number greater than or equal to 5,000,000 Hz but less than or equal to 65,000,000 Hz
chan_width is the width of the upstream channel for this state, in Hertz. Valid values:
1,600,000 Hz
3,200,000 Hz
6,400,000 Hz
mod_prof is the modulation profile number for this state. It is used to reference a previously defined modulation
profile. Values must be greater than or equal to 1.
The sampling period, the time in seconds between samples used for the degradation and the improvement triggers, is the
basis for all other Upstream Agility timers. If the sampling period is set smaller, then better resolution is possible. If it is set
larger, then the C4/c CMTS uses fewer system resources. In the CLI syntax it is called sample-period.
Use the following command to define the sampling period used in degradation and improvement triggers:
configure cable spectrum-group <SM_ID> sample-period <sample_period> [no]
Where: SM_ID is the state machine identifier. Range = 1-40.
sample_period is the time in seconds between samples used for the degradation and the improvement triggers. Range
= 1-60. Default = 4 seconds.
The [no] form of this command resets the sample period to the default value (4 seconds).
Use the following command to set the minimum number of codewords that must be seen on the upstream channel before
the degradation and improvement triggers are considered to be valid:
configure cable spectrum-group <SM_ID> min-codewords <min_codewords> [no]
Where: SM_ID is the state machine identifier. Range = 1-40.
min_codewords is the minimum number of codewords that must have been transmitted on the upstream channel
before the degradation and improvement triggers are considered to be valid. Range = 100 to 32768. Default = 256.
The count for the number of codewords received is reset to zero when a CAM sparing event occurs.
The [no] form of this command resets this value to the default (256).
