ZyXEL Communications IES-1248-51 - ADSL Loopback Command; ADSL Upstream PSD Command; Figure 233 ADSL Loopback Command Example

IES-1248-51/51A/53 User’s Guide
370 Chapter 55 ADSL Commands
55.1.10 ADSL Loopback Command
Syntax:
ras> adsl loopback <portlist> < f5> <vpi> <vci>
where
This command has the IES-1248 perform an OAMF5 loopback test on the specified ADSL
port(s).
The following example has the IES-1248 perform an OAMF5 loopback test on ADSL port 1’s
PVC at VPI 0 and VCI 33.
55.1.11 ADSL Upstream PSD Command
Syntax:
ras> adsl usnompsd <portNo> [<max nominal psd>]
where
This command displays or sets the upstream maximum nominal transmit PSD (Power Spectral
Density).
<portlist> =
You can specify a single ADSL port <1>, all ADSL ports <*>
or a list of ADSL ports <1,3,5>. You can also include a range of
ports <1,5,6~10>.
< f5> =
Use f5 to perform an OAMF5 loopback test on the specified
DSL port. An Operational, Administration and Maintenance
Function 5 test is used to test the connection between two DSL
devices. First, the DSL devices establish a virtual circuit. Then
the local device sends an ATM F5 cell to be returned by the
remote DSL device (both DSL devices must support ATM F5 in
order to use this test).
<vpi> <vci> =
When you perform an OAMF5 loopback test, specify a VPI/
VCI.
Figure 233 ADSL Loopback Command Example
ras> adsl loopback 1 f5 0 33
port[1] OAM F5 loopback test: failed
<max nominal
psd>
=
-400 ~ 40 (unit of measure is 0.1dBm/Hz)