ZyXEL Communications SAM1316-22, Руководство пользователя

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Chapter 59 DSL Commands
SAM1316-22 User’s Guide
388
The profile contains information on SHDSL line configuration. Each entry in this
table reflects a parameter defined by a manager, which can be used to configure
the DSL line. After you create a DSL profile, assign it to DSL ports.
You must specify at least the profile’s name and minimum and maximum rates.
The default value will be used for any of the other fields that you omit.
The minimum transmission rate must be less than or equal to the maximum
transmission rate.
When using 4 or 8-wire groups, you must apply the profile to every port in a
specific set of ports. For example, a profile for a 4-wire group can be used with
ports 1,2 or 3,4 but not with ports 2,3 or 4,5. A profile for an 8-wire group can be
used with ports 1,2,3,4 or 5,6,7,8 but not with ports 2,3,4,5 or 4,5,6,7.
The following example creates a premium profile (named gold) for providing
subscribers with very high connection speeds. The minimum transmission rate is
2112 Kbps and the maximum transmission rate is 4096. It sets two ports to
function as a 4-wire group. It uses G.992.1 Annex A (DSL over POTS). It turns on
line probes and has them use the current condition target signal to noise ratio
margin which it sets to 5 db.
lp_off =
Disable line probe.
The DSL line card and subscriber modem use line
probes to determine the best possible transmission
rate. This is used in rate adaptation. This is the
default line probe mode.
If you disable line probe, the system skips the rate
adaptation phase to shorten connection set up
time.
lp_on_cur =
Enable line probe with current target Signal to
Noise Ratio margin.
lp_on_wc =
Enable line probe with worst case target Signal to
Noise Ratio margin.
<curr-margin>
=
The current condition target Signal to Noise Ratio
margin, -10 ~ 21 in dB.
<worst-margin> =
The worst case Signal to Noise Ratio margin, -10 ~
21 in dB.
Figure 222 DSL Port Profile Set Command Example
ras> shdsl profile set gold 2112 4096 annexa 4wire lp_on_cur 5