User`s manual

Chapter 4 Port Configuration and Monitoring 5620 Model Descriptor for LA-110 User’s Manual
4-18 Data Port Configuration
Figure 4-13. AAL1 Stream Interface Port Loopback State
2. Fill in the fields, as described in Table 4-8.
3. Click <Save> to save the changes.
Table 4-8. Data Port - AAL1 Stream Interface Loopback State Parameters
Parameter Remarks
Port The selected port
Read-only
Loopback Test Activates a loopback test on the specified port
• Local Loopback (LLB): Can be used to check the source of a certain problem.
Activates the local loopback on the local data port. Checks that the user's equipment
receives its own signal while the loopback is connected. If it does, the problem is
external.
• Remote Loopback (RLB): Can be used to check the source of a certain problem. For
example, if there is certain alarm on a port, and if after activating the RLB the alarm
disappears, then the problem is external.
• None: No Test.