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Advanced Troubleshooting and Repair
Troubleshooting Phone Audio Quality
To Troubleshoot Phone Audio Quality:
1. Go to the table below.
2. If you cannot solve the problem using the table, go through the steps
on page 240.
3. If you still can’t find the problem, call Mitel Technical Support.
IMPORTANT: Make sure you have the following information
on hand before calling:
• Setup scenario
• Is there a common denominator (router, only one side of
subnet, etc.)?
• Other call scenarios (IP to IP, IP to TDM, etc.)
• Layer 2 switch configuration and settings
• Router configuration and settings
• Network diagram
• IP addressing scheme
• VLAN configuration and settings
• Layer 2 switch port statistics for FCS, collision and duplex
mismatch.