Programming instructions

196
3300 ICP Technician’s Handbook
If you still can’t fix the problem, contact Technical Support. Make sure you
have the following information on hand before calling:
 Error message from NSU Maintenance port.
 Boot sequence from NSU Maintenance port.
 Symptom appears in Troubleshooting table?
 PRI: can access IMAT database?
Analog Services Units (ASUs)
• Verify the status of the LEDs (see “Analog Services Unit LEDs” on
page 351).
• Verify that the IP addresses reserved for the ASUs are not used
elsewhere on the system (see “Analog Services Unit” on page 38).
FTP into the NSU
fails.
Release 4.1 and
later requires a
username and
password to login
Enter:
username, mitel
password, passwd1
NSU is up, but L0
or L1 LED is solid
red
No physical
connection to far
end.
1. Verify and fix wiring.
2. Check DIP Switch 6. If it is UP, set
it to DOWN to see if this makes any
difference (see Table 53 on
page 268).
NSU is up, but
L0/L1 LED is
flashing green
Layer 2 is not up.
Layer 2 protocol
mismatch.
1. Check your IMAT database and
verify with your Telco which
protocol you should use.
2. Check the DSU wiring.
Distorted voice or
loud noise on NSU
Voice Encoding is
not set properly.
Change Voice encoding in the link
descriptor to invert for T1, and ADI
invert for CEPT (this does not apply
to Embedded PRI).
Table 18: NSU Troubleshooting (continued)
Symptoms Probable Cause Corrective Action
(Page 3 of 3)