ZyXEL Communications P-971M User Manual page 29

Table 1 Connection Screen Summary (continued)
LABEL
Modulation
Symbol Rate
Downstream
Power
Upstream
Channel
Lock Status
Channel ID
Upstream
Frequency
Modulation
Symbol Rate
Upstream
Power
CM IP Address
Duration
Expires
Current System
Time
Chapter 2 Connection Screen.
DESCRIPTION
This is the method used to encode transmission information, similar to FM or AM on
your radio. The P-971M supports QAM256 or QAM64 (Quadrature Amplitude
Modulation) for the downstream channel.
The symbol rate (in Kilo symbols/second) for communication from the CMTS to the
P-971M. This is set during initial configuration with a value supplied by the CMTS.
Typical values for QAM64 are 5.05 Mega-symbols/second, and for QAM256 5.36
Mega-symbols/second.
The power level (in decibels/mili-volt). This value is set by the CMTS.
This is the data path used by the P-971M for sending information to your CMTS.
The P-971M is either Locked or Not Locked on to the channel advertised by your
cable operator's CMTS.
A standard channel number from the DOCSIS 2.0 specification. Channel numbers
and channel frequencies are specified in pairs in DOCSIS 2.0.
A standard channel frequency (in hertz) from the DOCSIS 2.0 specification.
This is the method used to encode transmission information, similar to FM or AM on
your radio. The P-971M supports QAM16 or QPSK (Quadrature Phase Shift
Keying) for the upstream channel.
The symbol rate (in Kilo-symbols/second) for communication from the P-971M to the
CMTS. This is set during initial configuration with a value supplied by the CMTS.
The power level (in decibels/mili-volt). This value is set by the CMTS.
This is the IP address negotiated with your cable operator, after a successful
download of the modem configuration file and DHCP negotiation (e.g.10.21.0.11).
This field may also be blanked out with a series of dashed lines (--- --- --- ---)
indicating that the modem configuration failed or is in progress; no IP address has
been set.
The IP address negotiated with your cable operator has a default lifetime of 7 days
(e.g. D: 00 H: 01 M: 00 S: 00). The sequence (D -- H -- M -- S --) indicates that your
modem configuration has failed or is in progress; no IP address duration has been
set.
This is the expiration date of the IP address, after installation of the modem
configuration file and DHCP negotiation. The default is 7 days (e.g. Wed Jul 02
00:26:23 2005). A sequence of dashes (--- --- -- -- -- -- ----) indicates that your
modem configuration has failed or is in progress; no IP address expiry date has
been set.
This is the current date and time, and is set by your cable operator's time server.
P-971M User's Guide
28