Figure 12-3 Vdsl Channel Status; Table 12-E Vdsl Channel Status Counters - ZyXEL Communications VES-1000 Series User Manual

This command displays the status of a VDSL channel.
The 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.
ves100> vdsl st vdsl01
VDSL Channel vdsl01 Parameters:
General Status Registers:
MODEMSTAT = 0x80
RSTSTAT = 0x40
DS =
US =
US SNR = 36.42 36.49 36.49 36.33 36.46 36.42 36.45 36.38 dB
US MSE = 13.82 13.89 13.89 13.73 13.86 13.82 13.85 13.78 dB
DS SNR = 42.68 42.57 42.68 42.65 42.76 42.77 42.69 42.68 dB
DS MSE = 20.08 19.97 20.08 20.05 20.16 20.17 20.09 20.08 dB
Average US SNR = 36.43dB
Average DS SNR = 42.69dB
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
Power Parameters:
MIN_PSD = 0x10,
TXPOWER = 0x32d,
PSD = -57.00 dBm/Hz
ves100>
FIELD
VDSL Channel Parameters: General Status Registers
MODEMSTAT
LINK STAT
VER_SOFT
VER_HARD
RSTSTAT
FAILCNT
DS and US
QAM
Rate
SNR
VDSL-Related Commands
LINK_STAT = 0xae
FAILCNT = 0x00
QAM 256, Int 12, Rate = 16666666 bps, fc = 1953125 Hz
QAM 256, Int 12, Rate = 16666666 bps, fc = 5541992 Hz
US MSE = 13.83dB
DS MSE = 20.09dB
MAX_PSD = 0x32d
POCO = 0x5

Figure 12-3 VDSL Channel Status

Table 12-E VDSL Channel Status Counters

This field displays the modem status.
This field displays the link status. The link is up if this field displays 0xac or 0xae;
otherwise the link is down.
This is the on-chip firmware version (not patch version).
This is the chip hardware version.
Reset Status indicates the reason for the most recent system reset.
This field displays VDSL Fail counter information.
The following parameters apply to both upstream and downstream VDSL.
Constellation shows the modulation method and speed. The constellations are QAM
4, QAM 8, QAM 16, QAM 64, QAM 256 where QAM (Quadrature Amplitude
Modulation) defines how many bits there are per symbol; for example QAM 4 means 2
bits per symbol (2
Int Int (Interpolation) defines how fast the symbols go through the line. It is equal to
25.0MHz / baud rate, so for example, Int 8 = 25.0 / 8 Mbaud.
This is the VDSL raw speed.
Fc This is the carrier frequency
The higher the SNR (Signal-to-Noise Ratio) number, the better. SNR (Signal-to-Noise
R i i h i
VER_SOFT = 0xb4
DESCRIPTION
2 3
), QAM 8, 3 bits (2 ) per symbol and so on.
f h li d f h d
VES-1000 Series Ethernet Switch
VER_HARD = 0x32
i d i l h li d f i
12-5