ZyXEL Communications MSC1000G Series, User Manual

Page: 174 / 1168

Chapter 6 Diagnostic Screens
Management Switch Card User’s Guide
174
6.9 SELT Test Screen
Click Diagnostic > SELT Test in the navigation panel to display this screen. Use this screen to
perform a SELT (Single End Loop Test) on a port to check the distance to the subscriber’s location.
Not all line cards support the SELT test.
Note: The port must have an open loop. There cannot be a DSL device, phone, fax
machine or other device connected to the subscriber’s end of the telephone line.
Figure 97
Diagnostic > SELT
The following table describes the labels in this screen.
LTM Index Enter the index number of a Link Trace Message (LTM) packet and click the Get Linktrace Data
button to see the detailed test result.
LTR Index Enter the index number of a Link Trace Response (LTR) packet and click the Get Linktrace
Data button to see the detailed test result.
Get
Linktrace
Data Click this to display detailed results of the test.
Table 70
Diagnostic > CFM Linktrace (continued)
LABEL DESCRIPTION
Table 71
Diagnostic > SELT
LABEL DESCRIPTION
SELT Test Select slot and port numbers from the Slot (not all cards support the SELT test) and Port drop-
down list boxes and click Set SELT Port to perform a Single End Loop Test (SELT) on the
specified port. This test checks the distance to the subscriber’s location.
The SELT takes at least fifteen seconds. To check the status of the SELT or to look at the results
when the SELT is complete, select a port number from the
Port drop-down list box and click Get
SELT Data . The results tell you what gauge of telephone wire is connected to the port and the
approximate length of the line.