Troubleshooting guide

Troubleshooting Guide
208
Diagnosing DSP Module Related Issues
Refer to Mitel Knowledge Base article 05-5107-00004 for information on how to diagnose DSP
module issues.
Use the following maintenance commands to obtain information concerning DSPs:
• DUMPDSPBOOTINFO - to display DSP resource allocation on the system.
• SHOWDSPSTATUS - to display the current status of all detected DSP MMCs on the system.
Diagnosing Formatter Card Problems
When diagnosing DS1 or CEPT Formatter Card problems:
• To obtain an indication of a link’s performance over a 24 hour period, use the command:
“DTSTATS READ x x x x LAST 24” (where x x x x is the cabinet, slot, shelf, link of the card).
• For the STATE command: if state is “suspect”, suspect faulty card or problem with 12 volt
power. If state is “not seizable”, suspect 24 hour limit exceeded, relay stuck closed (test
using the TEST HYBRID command), or faulty programming. The card will also appear “not
seizable” for a short period after being installed.
• For the DTSTATS command: if many “number of max trans” messages, suspect incorrect
Address For Message Control programming in the Digital Link Descriptors form. If “sync is
absent”, suspect faulty cabling, problem at the far end, or directed testing being performed
at the far end. Otherwise, no sync coupled with directed hybrid test passing indicates cabling
problem.
• When a formatter card is reloaded or removed, all calls that are using any channel on the
card will be dropped.
• If one channel on one card is faulty, and does not affect traffic, it is not necessary to replace
the card. The channel may be busied out using the BUSY command.
Diagnosing MSDN/DPNSS Link Problems
If there is a problem with the MSDN/DPNSS link:
Establish whether all calls are affected.
• If all calls are affected check the status of the link by using the DTSTAT READ PLID
command.
• If the link is unavailable check the cabling. Test with a back to back cable to prove the DS1
or CEPT card.
• If the link is available check the errors.
• If some calls fail check the following:
Note: There is no backplane cabling between the interface assembly and the DSU Card.