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| Table |
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Problem | Solution |
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The connected DTE device | Run a DTE/NET Loopback to verify the physical connection between the |
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shows intermittent errors. | local DTE device and the DL3800E. |
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| If errors are reported during this loopback, check the DTE cable. |
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| Make sure the DTE device supports the DTE port clocking option. |
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| Use SCTE clocking for the DTE device if the application is using V.35, and |
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| the DL3800E unit has more than two connected E1 circuits. |
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| Try inverting DTE Tx clock and/or Rx clock when in |
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| modes. |
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| Make sure the DTE device can handle the set DTE clocking speed. |
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The DTE/NETWORK | Make sure the DTE device can run to a DCE in loopback. |
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Loopback does not work |
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towards the locally | If configured for SCTE, the DTE device must be able to support SCTE clock. |
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connected DTE device. | If it does not, set the clocking to SCT. |
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| Make sure that the Transmit or Receive clock is inverted. |
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| Make sure the DTE device does not need to see RLSD (RECEIVE LINE SIGNAL |
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| DETECTED) during this loopback. If it does, set RLSD in the DTE |
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| CONFIGURATION MENU to ASSERT this lead. |
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The DL3800E unit has | Make sure the timing source is set properly. |
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timing and synchronization |
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problems. | If the clock source is provided by the circuit provider, set XMT PRIMARY |
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| CLOCK SOURCE to Net, and RCV to the E1 network providing the clocking. |
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| If the clocking is expected from a specific E1 circuit but the circuit is not in |
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| service, set RCV PRIMARY CLOCK SOURCE to AUTO. |
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| If the clock source is not provided by the circuit provider, set XMT PRIMARY |
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| CLOCK SOURCE to INT and the remote unit XMT PRIMARY CLOCK SOURCE |
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| to NET, and RCV to AUTO. |
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| Make sure the proper E1 cables are plugged into the corresponding ports on |
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| the DL3800E. |
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Diagnostics |
