Mitel SX-200 - Trunk Fault Report Procedures

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SECTION MITL9105/911 O-096-350-NA
TABLE 5-5
TRUNK FAULT REPORT PROCEDURES
Fault
Reported As Step 1
Step 2 Step 3
wrong numbers
Check the trunk at the Check for reverse, or Replace the Trunk card.
trunk card
cross-connect field DTMF check the System ground. Replace the Receiver
and DP. Ensure that Check trunk and trunk card if there is
the system is not group type. DTMF-to-DP conversion
programmed to outpulse Ensure that the DTMF and STOP
both DTMF and DP to a DP are not going into a
DTMF trunk Check that DTMF trunk Ensure you
DTMF tones are not going are not dialing tie
into a DP Trunk trunk-to-tie trunk
Always receives busy tone Check for correct trunk Check for reverse or open Replace suspect trunk
after dialing a trunk access code.
tip and ring on trunk
card
access code Check for Call Blocking. Check System ground.
STOP
Check Trunk Group for
Check for two loop start
Supervisor Access only. trunks connected together.
Check for full printer
Check for ground start open.
buffers,
Automatic Wake-Up and
SMDR.
Cannot break CO dial tone Check the trunks at the
If the trunk tests good STOP
cross-connect field for
replace the Line card.
DTMF and DP
Check the dial dictation.
switches. Check Trunk card,
Section MITL9105/911 O-
096-200-NA. If there is
tone-to-pulse conversion,
replace the Receiver card.
-
Trunks dropped by the Check for intermittent On the Trunk card, check Replace the Trunk card
system extension switchhook that the 50 ms switch
At the cross-connect field in position. STOP
check the trunk with a Program for longer
butt-in; ensure this is not switchhook flash (System
a CO problem. Options 114, 180, 181, 182).
Trunks being hung on the
Check trunk type and trunk Check the trunks provide STOP
system
group programming; i.e., tie release supervision.
trunk-to-CO trunk Replace the Trunk card.
connections or loop starts
trunk together. Ensure there
is a good ground for ground
start trunks.
Two trunks ring
when only one
trunk is rung
Check trunk programming
that even numbers are
not programmed and odd
equipment numbers are
wired.
STOP
Note: These are other trunk card problems that may occur:
- Calis ring in, but don’t show up on the console
- One-way transmission
- Noisy trunks (eliminate CO trunk with a butt-in at the cross-connect field first)
- Trunk card alarm LED lit
- Dropped calls from the CO (eliminate CO trunk with a butt-in at the cross-connect field first)
- Station conference oscillations with two or more trunks
- Collisions due to one loop start trunk being seized same time (i.e, incoming and outgoing)
- AC induction on trunks
- Trunks out by one pair when punched down
- Low ringing current (from the CO) at the cross-connect.
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