Programming instructions

193
Troubleshooting
Embedded BRI
Table 17: Embedded BRI Troubleshooting
Symptoms
Probable
Cause
Corrective Action
Embedded BRI
calls fail and all
Status LEDs on
the Quad BRI
Framer are dark
Configuration Verify embedded BRI is programmed
properly in the following forms (see also
Program Embedded BRI in the online
Help):
• Controller Module Configuration
• Quad BRI Framer Configuration
• Link Descriptor Assignment
• Digital Link Assignment
• Protocol Assignment
After the Digital Link Assignment form is
completed, the red Quad BRI Framer
status LED should come on. This takes
about 15 seconds.
Embedded BRI
Links are “not
seizable”,
Status LEDs
show RED
alarm
Configuration or
Wiring
Ensure that the ISDN cable is plugged into
the correct RJ-45 port on the Quad BRI
MMC. Verify that the ISDN cable is
correctly wired (straight through for trunk
interface, crossover for terminal). Note
that 3-4 and 5-6 are the relevant pins for
the cable.
Toggle the “Bus Type” setting in the
Protocol Assignment (either S or T). This
change takes about 30 seconds to take
effect.
Ensure that the Manual TEI value is
correct (if required).
High number of
slips
Configuration of
Network
Synchronization
form.
Ensure that the synchronization source
being selected is not connected to a BRI
terminal.
If there is a digital E1 trunk, that should be
used as the first synchronization choice.
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