Intellisystem IT-7301-PC, Руководство пользователя

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11
6.Common Problems
Common Failures and Solutions
No.
Failure Cause Solution
1
PWR power supply indicator
lamp not lightening
1.Power supply not properly
connected
2.Protector tube damaged
3. -48V DC input tie-line in reverse
connection
4.Internal power supply circuit with
failure
1.Check power switch and jack 2.Replace protector
tube
3.Correct -48V power supply line connection
4. Returned to the manufacturer for repair.
２
Optic interface LOF out-of-frame
alarm lamp lightening
1.Optic interface not clean
2.Optic fiber not well inserted
3.Wrong clock setting
4.Time slots of the devices at two
ends not conformance
5.Internal circuit damaged
1. Clean the connector of optic interface
2. Insert the SC connector in place
3. Refer to the description on rear panel
4. Returned to the manufacturer for repair.
3
Optic LOS data loss alarm lamp
lightening
1. Optic fiber in wrong
interconnection
2.Optic fiber not well inserted
3.Optic fiber broken
4.Internal circuit damaged
1. Correct the connection
2. Insert the SC connector in place
3. Check optic cable
4. Returned to the manufacturer for repair.
4
Lightening of LOF out-of-frame
alarm lamp at E1 interface
1.Error code in the line of E1
interface
2.Internal circuit damaged 1.Check if UTP wire couple is twisted or the
connecting cable is not good contact
2. Returned to the manufacturer for repair.
5
Lightening of LOS data loss
alarm lamp at E1 interface
1.Line of E1 interface not getting
through
2.Internal circuit damaged
1. Check the linear sequence of UTP cable or check if
crystal head is in good connection; Check if coaxial
cable is broken
2. Returned to the manufacturer for repair.