User`s guide

Section 360−381−S02
26
7. TESTING
7.1 Loopback Test
Use the Loopback tests to troubleshoot problems when an alarm is reported on the card.
7.1.1. Loopback of T1 Card
Use the following steps to perform the T1 card loopback.
Note: Loopback tests will affect the service being provided. Loopback tests will not function if there is an alarm
present on the ICB.
Step Action System Response
1. Select Loopback Test " Loopback of T1 Card Opens the Primary T1 Card Loopback dialog box
(see Figure 20).
2. Select the type of loopback you want to perform
(Line or Payload)
3. Select the loopback location (near end or far end)
4. Select Loopback Initiates the loopback. Results will be displayed in
the alarm status area of the main screen (see
Figure 18).
Figure 20. T1 Card Loopback
Parameter Possible Choices Use to...
Type Line Loop T1 (24 DS0s and overhead).
Payload Not available for Near End. Loop T1 ICB to itself (available in ESF
mode only) (24 DS0s only).
Location Near End Loop local T1. This option is not available when payload loopback is
selected.
Far End Loop T1 at remote ICB.
Note: Far end line loopbacks will block far end ICB Remote Management.
7.1.2. Loopback of E&M Card
Use the following steps to perform the E&M card loopback (this is a bidirectional network/local loopback).
Step Action System Response
1. Select Loopback Test " Loopback of EM Card Opens the EM Loopback/Release dialog box (see
Figure 21).
2. Select the Loopback or Release tab.