Troubleshooting guide

Section 7, User Interface Guide - DLP-737, Provision DSX-1 (T1/E1) Interface
61186003L1-1D 7-149
This parameter sets the line length for each T1 interface according to the distance from
the MX2820 system to the DTE device. The E1 line length is not selectable and remains at
0-6 dB loss. Options for a T1 line length are as follows:
• 1 - sets line length from 0 to 133 feet
• 2 - sets line length from 133 to 266 feet
• 3 - sets line length from 226 to 399 feet
• 4 - sets line length from 399 to 533 feet
• 5 - sets line length from 533 to 655 feet
10. From the T1/E1 Provisioning menu, select T1/E1 LOOPBACK DETECTION.
This parameter determines which T1 line responds to CSU or NIU loopback requests
coming from the network. Set to CSU or NIU to allow the T1 line to respond to either a
CSU or NIU request. Set to Disable to permit the T1 line to ignore the loopback request.
This option is not available in E1 mode. Values for the T1 line are as follows:
• 1 - Disabled, T1 line ignores loopback requests
• 2 - CSU, T1 responds to CSU loopback requests
• 3 - NIU, T1 line responds to NIU loopback requests
11. From the T1/E1 Provisioning menu, select T1/E1 CIRCUIT PROTECTION.
This parameter determines which circuit is allowed to initiate a protection switch if a
failure in the circuitry for a channel is detected. If a T1/E1 line is set to Disabled, then the
failure of the circuitry for that one channel does not cause a protection switch. If a T1/E1
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.
13. 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.
14. Input the new alphanumeric line identification data, and press
ENTER. This step can be
repeated for all T1/E1 lines.
15. 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.