Checking The T1/E1 Combo Mmc Indicators - Mitel MiVoice Business Troubleshooting Manual

C 10
HAPTER
Digital Link Alarms
On the primary controller, digital links that are associated with resilient trunks generate alarms if the links
are not in a healthy state. On the secondary controller, the digital links for resilient trunks are included in
the system total of the "Digital Links" alarm category.
Netsync Alarms
You can program a resilient trunk on the primary controller as a netsync source. However, do not program
a resilient trunk on the secondary controller as netsync source because the system will generate a minor
netsync alarm.
Typically, the alarm threshold is set such that a minor netsync alarm is generated if a netsync source is
unavailable. While the resilient trunks are supported by the primary controller, the resilient trunks on the
secondary controller are in a non-seizable state so the netsync source is considered unavailable. The
system, therefore, generates an alarm.

Checking the T1/E1 Combo MMC Indicators

shows the location of the indicators on the T1/E1 Combo MMC (PN 50005160). The LEDs
Figure 10.3
show the status of the link while the link is associated with the primary controller.
The following table shows the meaning of the indicators. If the primary controller fails and transfers
support for the trunk to the secondary, the LEDs on the T1/E1 Combo MMC will flash red and green.
Meaning of T1/E1 Combo MMC Indicators (Sheet 1 of 2)
Table 10.15:
Indicators
T1/E1 Combo MMC Indicators
Figure 10.3:
Meaning
Link is functioning
properly. No alarms
present.
Primary controller has
failed and the system
has transferred support
for the link to the T1/E1
MMC in the secondary
controller.
Loss of T1/E1 signal.
No signal is being
received from the
PSTN.
C T1/E1 R
HECKING ESILIENCY
D
IAGNOSING
Action
None.
Investigate reason for
failure of primary
controller. See
IP
Device Resiliency.
Check link connection.
Check link with
analyzer.
A
LARMS
P
ROBLEMS
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