Troubleshooting guide

Troubleshooting Guide
56
ONS Sets ONS sets not ringing on a
peripheral node, AX
controller, or ASU;
however set can be
answered and a two-way
conversation carried out.
Frequency-Shift Keying
(FSK) is not assigned in the
PSC DSP (Peripheral Switch
Controller/Digital Signal
Processor) form, and the
ONS sets have COS
CLASS/CLIP option
enabled.
1. Assign FSKs, or
2. Turn off ONS CLASS/CLIP in the
ONS Class of Service.
ONS sets not ringing on
an AX controller, or
ASU II.
Maximum number of ONS
supported on an AX
controller or ASU II has been
exceeded.
Number of ONS sets supported by
the AX controller or ASU II has been
exceeded. Refer to the Engineering
Guidelines for details.
Analog set The analog set on an
ONS port experiences a
“No dial tone” problem
when the message
waiting lamp is ON.
The AX controller may be
running 3300 Rel 7.1.3.4 or
earlier.
• You can patch the software load
on the AX controller(s). Download
3300_Patch_7.1.3.6.zip from
Mitel OnLine.
OR
• You can install or upgrade the AX
Controllers in your system with
the most recent post-7.1 software
load.
Single-line
Analog sets
Message lamp fails to
function.
Insufficient voltage. The ASU
and ASU II bays only support
message lamp activation at
90 volts. Some single-line
telephones require 110 volt
message light activation.
Some set models will support either
90 volts or 110 volts via dip switch
settings, Contact your supplier to
determine if the sets support
message lamp activation at 90 volts.
Analog or DNI
Phone
No Dial Tone Multiple possible causes See “No Dial Tone - Analog or DNI
Phone” on page 185.
Display
Phones
Display phone that
receives an incoming call
transferred from another
station does not shown
name or number for
incoming calls. Instead,
the final answer point
displays the transferring
party information.
Calls which into the system
over ISDN using 4ESS
protocol do not deliver name
or number on the display.
Refer to Mitel Knowledge Base
article 06-5104-00034
.
IP Phone No Dial Tone Multiple possible causes “No Dial Tone - IP Phone” on
page 187
Table 15: General Phone Troubleshooting
Phone Symptom Probable Cause Corrective Action
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