Technical information

ADC Telecommunications, Inc.
512 C
HAPTER 18: CONFIGURING AND MONITORING CABLE MODEM TERMINATION SYSTEMS
Setting Ranging Parameters
Ranging parameters allow you to fine tune how cable modems adjust power
levels during one ranging process.
To configure the ranging parameters, follow this procedure:
1 In the Upstreams, click Advanced tab.
2 Click the Ranging Parameters tab.
3 Select the channel ID that you want to configure, from the Selected
Upstream Channel Id menu.
4 Enter values for the parameters. Refer to Table 18-13.
5 Click Apply to commit the information or click Reset to return to the
default values.
Maximum Deferred
Ranging Invitations
Maximum number of deferred ranging invitations.
By default, Maximum Deferred Ranging Invitations
is set at 2.
Map Lead Time
(microsec)
Read-Only. Map lead time, in milliseconds. Lead
time must be estimated and added to map start
time in order that the subscriber modem map
receives and processes the map before it is out of
date.
Minimum Request
Region
Minimum size, in minislots, for request contention
region. The default is 20.
Table 18-12 Map Parameters Window (continued)
Parameter Description