P-971M User’s Guide
27
Chapter 2 Connection Screen.
2.1.5 Security
Your cable modem has features built-in to run Baseline Privacy (BP). BP is used as a privacy
mechanism to protect user data flowing across the cable network and to prevent unauthorized
access to the CMTS data flowing across the network. BP also supports access control lists
(ACLs), filtering, tunnels, spoof protection, and source IP filtering on the RF subnets to
prevent users from using IP addresses that are invalid. BP security information must be
included in your cable operator’s configuration file to enable security. If your cable operator
did not supply this information in the configuration file BP security is
Disabled
. Further
information can be found in DOCSIS 2.0.
2.1.6 Channels
Your P-971M uses different communications methods if it is receiving information from the
cable operator, or if it is sending information to the cable operator. These are called the
Downstream Channel
and
Upstream Channel
respectively. The channel numbers and
frequencies are advertised by the CMTS during the initial booting of the P-971M; these may
also be set in the configuration file.
Table 1
Connection Screen Summary
LABEL
DESCRIPTION
Acquire
Downstream
Channel
The P-971M has
Locked
onto the downstream channel. The status message will
display the frequency in hertz.
The channel lock is
In Progress
. The status message will display the frequency in
hertz.
Connectivity
State
The P-971M is
Operationa
l and the status is
OK
.
The P-971M connectivity is
In Progress
. See the description for Connectivity State.
Boot State
The boot state of the P-971M is
Operational
.
The boot state of the P-971M is
In Progress
. See the description for Boot State.
Configuration File A configuration file (cmb.cfg) was successfully downloaded from the upstream cable
operator’s CMTS, and installed on your P-971M. The status message displays
OK
.
The P-971M is attempting to negotiate and download a configuration file from your
cable operator’s CMTS. The status message displays
In Progress
.
Security
Baseline privacy security is enabled and the status message displays
Enabled
. The
comment field displays
BPI
.
The baseline privacy security is
Disabled
and the status message displays
Disabled.
Downstream
Channel
This is the data path used by the CMTS for sending information to your P-971M.
Lock Status
The P-971M is either
Locked
or
Not Locked
on to the channel advertised by your
cable operator’s CMTS.
Channel ID
A standard channel number from the DOCSIS 2.0 specification. Channel numbers
and channel frequencies are specified in pairs in DOCSIS 2.0.
Downstream
Frequency
A standard channel frequency (in hertz) from the DOCSIS 2.0 specification.
SNR
The Signal to Noise Ratio (in decibels/mili-volt), the ratio of signal power to channel
noise power. This value is set by the CMTS.
