Advanced Configuration Options
42
Model 2160 Series User Manual
4 • Web configuration
TCPAM Type
TCPAM (Trellis Coded Pulse Amplitude Modulation) is the standard used for line coding. Select the
TCPAM
type from the drop-down list.
Auto
is the default option for
TCPAM
. You can also manually set the TCPAM
type.
Main Rate
Select the line rate for your model from the
Main Rate
drop-down
list. The main rate is the multiple of
64kbps, 128kbps, or 256kpbs- depending on your model type. Use
Table 8
to determine the best main rate for
your model.
SNR Margin
Select the desired
SNR Margin
value from the drop-down list. SNR margin is an index of line connection
quality. You can see the actual SNR margin in STATUS. You will experience better line connection quality for
larger SNR margin values.
For example, if you set the SNR margin is 5, the LINE connection will drop and reconnect when the SNR
margin is lower than 5. On the other hand, the device will reduce the line rate and reconnect for better line
connection quality. You may select the SNR margin from the range -10 to 21.
Line Probe
For adaptive mode applications, set the
Line Probe
to
Enable
. The Model 2160 will adapt the data rate accord-
ing to the line status. The screen will prompt the parameters that will be written in NVRAM. Check the
parameters before writing in NVRAM.
For all other applications, set the
Line Probe
to
Disable
.
Click
Restart
to reboot the Model 2160 with the new settings. Click
Continue
to configure other options.
Table 8. Main Rate Chart
Model Type
Multiple
TCPAM-16
= 3–60
TCPAM-32
= 12–89
TCPAM-128
= 2–239
2160 2-wire model
64
192–3840
768–5696
128–15296
2161 4-wire model
128
384–7680
1536–11392
256–30592
2162 8-wire model
256
768–15360
3072–22784
512–61184