9 • Diagnostics | Model 3086 G.SHDSL Integrated Access Device User Guide |
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keyboard of the local terminal will appear on the local terminal screen after having been passed to the remote Model 3086 and looped back). See Figure 13.
Local 3086 | Remote 3086 | ||||
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Power | 10/100 |
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Figure 13. Remote Digital Loop
To perform an RDL test, follow these steps:
1.Activate the RDL by moving the front panel toggle switch DOWN to remote.
2.Perform a bit error test (BERT) using the internal V.52 generator (as described in section “BIT Error Rate (V.52) Diagnostics” on page 142), or using a seperate BER Tester. If the BER test indicates a fault, and the Local Line Loopback test was successful for both Model 3086s, you may have a problem with the twisted pair line between the modems. You should then check the twisted pair line for proper connections and continuity.
T1/E1 Diagnostics
The 3086/K offers two diagnostics loops for the T1/E1 interface: Network (line) loopback, and local loop, These tests can be activated via the CLI/Web management menus
Network Loop
The Network (line) Loopback applies to the T1/E1 interface data traffic; it does not affect traffic from the Ethernet port. The network Loop test verifies the operation of the T1/E1interface of the local unit and the T1/ E1 line. Any data received by the 3086 T1/E1 interface in this test mode will be echoed (returned) to the orig- inating device. This test is useful when the device connected to the 3086’s T1/E1 interface is unable to send loop codes to the local 3086’s T1/E1 CSU/DSU interface.
Figure 14. 3086 Line Loop
138 | T1/E1 Diagnostics |
