Troubleshooting guide

Section 7, User Interface Guide - DLP-742, Provision VT/Port (T1/E1) Interface
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line is set to Enabled, then the failure of a channel could cause a protection switch to
occur. This depends on the Protection Threshold setting in this menu.
The Protection Threshold setting determines how many of the Enabled lines must fail
before a module switch occurs. For example, to allow the failure of a single protected
(enabled) line to cause a module switch, set the Protection Threshold to 1.
Options for a T1/E1 line are as follows:
• 1 - Disabled
•2 - Enabled
12. From the T1/E1 Provisioning menu, select T1/E1 LINE IDENTIFICATION.
This parameter allows a user-configurable text string to name the individual T1/E1 lines.
This field accepts up to 32 alphanumeric characters, including spaces and special
characters.
•From the T1/E1 Line Identification menu, input a value from 1 to 28 to select the T1/E1
line that requires changing the line identification, and press
ENTER.
•Input the new alphanumeric line identification data, and press ENTER. This step can be
repeated for all T1/E1 lines.
13. From the T1/E1 Provisioning menu, select VT IDENTIFICATION.
This parameter allows a user-configurable text string to name the individual VT Ports.
This field accepts up to 32 alphanumeric characters, including spaces and special
characters.
• From the VT Identification menu, input a value from 1 to 14 to select the VT port that
requires a change to its identification, and press
ENTER. Input 15 to advance to the next
page to select ports 15 through 18.
• Input the new alphanumeric line identification data, and press ENTER. This step can be
repeated for all VT ports.
14. From the T1/E1 Provisioning menu, select T1/E1 XCV THRESHOLD.
This parameter sets the limit on Code Violations (CV) accepted by the unit over an
individual T1/E1 line before it switches MUX modules. If set to Disabled, code violations
do not cause the unit to switch MUX modules.
Options for the T1/E1 XCV Threshold are as follows:
• 1 - Disable. Code violations do not cause the unit to switch.
• 2 - 1E-3. The unit switches if more than one out of every 1,000 bits received on a T1/E1
line contains a code violation.
• 3 - 1E-4. The unit switches if more than one out of every 10,000 bits received on a T1/
E1 line contains a code violation.
• 4 - 1E-5. The unit switches if more than one out of every 100,000 bits received on a T1/
E1 line contains a code violation.
• 5 - 1E-6. The unit switches if more than one out of every 1,000,000 bits received on a
T1/E1 line contains a code violation.