Technical information

ADC Telecommunications, Inc.
528 C
HAPTER 18: CONFIGURING AND MONITORING CABLE MODEM TERMINATION SYSTEMS
Clearing Flap Lists
You may delete all entries in the flap list table on a specific cable interface.
To clear the flap list, within the Flap List Control window click the Clear Flap
List button. Note that a confirmation window is not displayed, and the
entire flap list table is cleared immediately.
Configuring CM Offline Control
You can control how long the CMTS tracks offline cable modems, and
manage cable modem statistics when a cable modem transitions out of the
offline state.
Configuring offline cable modems involves:
■ Specifying the number of days that you want the CMTS to track offline
cable modems.
■ Specifying whether you want the CMTS to maintain cable modem
statistics when the cable modem transitions out of offline state.
Insert Time Threshold:
(secs)
Specify a threshold that controls the operation of a
flapping modem detector. When the link
establishment rate of a modem is shorter than the
period defined by this parameter, the modem is
placed in the flap list.
By default, Insert Time Threshold is set at 604800
seconds. Acceptable values are 0 to 604800
seconds. Note that setting insert time to zero
results in cable modems never being inserted in the
flap list table, due to short link establishment times.
Power Adjustment
Threshold: (dBmV)
Specify the number of flap list events. By default,
Power Adjustment Threshold is set at 3. Acceptable
values are 1 to 10 dBmv. Note that setting power
adjustment to zero results in cable modems never
being inserted in the flap list table, due to power
adjustments.
Parameter Description