Trunk Board Troubleshooting

Trunk Board Troubleshooting Introduction:

This guide covers troubleshooting steps for AltiGen trunk boards. Refer to the Quick Install Guide and General Board Troubleshooting Tech Note to verify proper board installation and troubleshoot non-board type specific issues.



Spares and Testing Equipment:

In order to reduce your client's downtime and accurately diagnose and correct any issues, it is imperative that you stock appropriate spares and always bring your telecom tools with you when troubleshooting any board or hardware related issue.


Spares: Stocking spare parts greatly speeds up problem isolation and always makes clients happy. Having a spare part can mean the difference between a minor inconvenience and a critical issue.


Basic telecom tools to bring: Butt set, toner set, cross connect wire, harmonica, punchdown tool, RJ21-X (sometimes called amphenol) cable, banjo adapter, snips, RJ11 and RJ45 crimper, CT-BUS cable and a spare Triton power cable. Some basic hand tools like screwdrivers, pliers and a flashlight are also recommended.



Troubleshooting Steps:

1. Check that boards are installed properly, refer to the Quick Install Guide and General Board Troubleshooting Tech Note.


2. Ensure that the chassis is properly grounded and power is supplied by an adequate UPS. Dirty power or improper grounding can cause a number of quality issues on analog trunks and may also lead to physical board or chassis damage.


3. Check the LED status on the back of the board and confirm against the Telephony Hardware Manual.


4. Confirm carrier dial tone and call connectivity at the block via your butt set.


5. Re-punch the wiring on the block/patch panel.


6. Check impedance within Trunk Properties. Typically all trunks on a system should have the same impedance, the impedance check should choose the same setting each time it is run.

    a. If the trunks work fine when manually set to a specific impedance, but the test selects a different impedance, it is generally acceptable to manually set the impedance and check the 'Disable Impedance Match When System Start Up' button.


7. If a port issue is suspected, wire an extension port to the trunk port and see if the trunk goes ready (loop back test).


8. Triple-check the wiring order against the Quick Install Guide.


9. Run multiple passes of the CT-Bus Test Tool (unless the system is a MAX1000) and AltiGen Board Test Tool (unless the board is a Quantum).

    a. See the Quick Install Guide and General Board Troubleshooting Tech Note to troubleshoot CT-Bus failures.

    b. A failure when running the AltiGen Board Test typically indicates a bad board.


10. Reseat the board.


11. Move the board to a different PCI slot (if Triton), a different ISA slot (if Quantum) or swap the board to the other slot (if MAX1000).


12. Try the board in a different chassis.


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Last Updated
12th of July, 2012

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