Troubleshooting guide
Troubleshooting Guide
62
5224 IP 
Phone
After reset of phone, phone 
display stuck at “Upgrade 
part 3 14% Do Not Power 
Down”.
If you reset a phone during 
its upgrade process, the 
phone's flash memory will 
become corrupted.
Refer to Mitel Knowledge Base 
article 06-4409-00020.
5220 with 
5422 PKM
Any of the following:
• one way audio when 
using speakerphone 
(microphone will not 
transmit)
• Dual mode 5220 phones 
will not boot and will show 
“INIT ERROR PKM INFO 
INCOMPATIBLE” error
• Dual mode 5220 phones 
will not boot and will show 
“NO INIT ERROR PKM 
CARD INCOMPATIBLE” 
error
Unsupported hardware 
revisions. 
Refer to Mitel Knowledge Base 
article 04-3849-00863 for the 
minimum required hardware 
revisions.
A 5215 Dual 
Mode, 5220 
Dual Mode, 
5235, 5304, 
5312 and 
5324 IP 
Phone fails to boot up. Set 
display shows “Port Access 
Control – Press # to 
Continue”.
802.1X port authentication 
is enabled in network, but 
IP phone is not configured 
with a username and 
password.
Configure username and 
password on IP phone. See 
“Configuring an Authentication 
Username and Password” on 
page 193. 
OR
Disable 802.1X support in the 
Layer 2 switch. See “Enabling or 
Disabling 802.1X Authentication” 
on page 195.
Table 16: Specific Model Troubleshooting
Phone Symptom Probable Cause Corrective Action
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