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Chapter 3
Troubleshooting
Troubleshooting Procedures
Error
Event
Possible
Cause
Remedy
The B1 LED is
always lit after
power up
The RAM is
defective.
Consult your dealer.
The B2 LED is
always lit after
power up
The ISDN chip is
defective.
Consult your dealer.
No dial tone from
ISDN switch or
PABX
1. Can not
activate S
0
1. Ensure that the
ISDN S
0
line is
securely connected
to the RJ-45 jack.
2. No B channel
available
2. Ensure no other
device is on the
same S
0
line and
occupying the B
channel.