ZyXEL Communications P841C, User Manual

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P841C Central-Side VDSL Modem
4-4 VDSL-Related Commands
This command makes the P841C loads new VDSL modem code into the P841C (LT) or P841 (NT). If “LT” is
specified, the P841C will load the VDSL modem code into the P841C. If “NT” is specified, the P841C will load
the VDSL modem code into the P841. The VDSL connection should automatically reconnect after the new VDSL
modem code has been successfully loaded.
4.1.6 VDSL Reset Command
vdsl reset
This command causes a software reset to the VDSL Chip (local or remote). The VDSL link first disconnects
before the channel resets.
4.1.7 VDSL Reconnect Command
vdsl reconnect
This command forcibly causes the P841C to reconnect the VDSL link.
4.1.8 VDSL Status Command
vdsl status
This command shows the VDSL status register values as shown in the next example. Information in these fields is
mainly for debugging purposes.
SNR, MSE and RS_ERR are polled every three seconds. Total RS_ERR are counted during the connection. SNR,
MSE, RS_ERR and Total_RSERR are cleared after the VDSL is link up.
Figure 4-5 VDSL Status Example
P841C>vdsl status
VDSL Parameters:
LINK_STAT = 0x00 DISC = 0 Modem Code = (0x50,N/A)
VDSL Line Quality Status:
US = QAM 4/Int 32, Rate = 1562500 bps, fc = 4467773 Hz
DS = QAM 16/Int 24, Rate = 4166666 bps, fc = 1831054 Hz
US SNR = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dB
US MSE = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dB
DS SNR = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dB
DS MSE = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dB
Average US SNR = 0.00dB US MSE = 0.00dB US Noise Margin = -9.00dB
Average DS SNR = 0.00dB DS MSE = 0.00dB DS Noise Margin = -9.00dB
US RS_ERR = 0 0 0 0 0 0 0 0
US Total RS_ERR = 0
DS RS_ERR = 0 0 0 0 0 0 0 0
DS Total RS_ERR = 0
LT Power Parameters:
TXPWR = 0x32d, POCO = 0x0, POWER = 5.70 dBm, PSD = -55.27 dBm/Hz