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Fault
Service
Code
class
Threshold
1
2
2
1
3
2
4
3
5
3
6
3
7
2
8
1
9
3
10
3
11
2
12/13
2
14
2
15
2
16
1
17
3
18
3
19
3
20
2
21
3
22
3
23
1
26
2
27
2
28
1
29
3
33
1
34
1
35
2
36
2
37
1
38
1
39
1
40
3
41
2
50
1
51
2
52
2
*Not handled by tam_dbas, so threshold is effectively infinite
Maint-DCT1900/R8/mw
© 2000-2005
Fault
Description
5
Unexpected message/primitive. Message received but not within specified time
99
Board/CPU communication error or time out. Message corrupted or not received
99
Threshold fault counter or Reset counter exceeded
1
Board controller ROM error
1
Board controller RAM error
2
Internal loopback error
5
Peripheral state error
- State of peripheral differs from state listed in CPU data base
30
Base Station not present
- wiring fault or power lost
2
Peripheral ROM error
2
Peripheral RAM error
99
Peripheral status unknown. Two simultaneous faults: status can not be obtained
99
Board status unknown. No communication with board: status can not be obtained
5
Peripheral communication error or time out. Message corrupted or not received
2
Board signalling link was cut. When a board is not polled, it resets itself and after
communication has recovered it sends this message to CPU
10
Board controller poll response error
99
CPU main processor RAM error
99
CPU main processor ROM error
99
CPU EEPROM error
1
CPU real time clock test failed
2
CPU–poll processor (8031) RAM error
2
CPU–poll processor (8031) ROM error
2
CPU–poll processor communication error
5
CPU internal buffer overflow
99
Board controller watchdog reset
2
HSCX error. Serial communication controller on CPU of signalling highway
99
Signalling highway down. No communication between CPU and all other boards
1
Initialization procedure not successful. Due to e.g.: no communication with board
99
Portable Telephone related circuit not present. LTC or DTU–channel
30
Layer 1 fault at link with PBX: no physical connection or DTU error, L1 = MFG
- this fault may disappear automatically. CPU will set L1 and L2 to AVE again. The
service error message and general alarm remain and must be cleared manually
30
Layer 1 fault at link with PBX: Error in trunk unit of remote PBX (PBX did detect the
error), L1 = MFG - see note at fault 35
4
Layer 2 fault at link with PBX: No multiframe synchronization, L1=AVE, L2=MFG
- see note at fault 35
2
DTU or DLU hardware failure
99
PC communication error
- when statistics runs, logging is stopped. Statistics must be set "ON" again.
3
SPU parameters on board have wrong checksum
99
System Sync Delay hardware out of lock
*
Minimum configuration error, see Chapter 2, Paragrah 2.4.1, "Backplane Reset"
*
Subject is unreliable. Fault is not continuously present
*
Subject could not be tested after maintenance action due to a coincidence
- Subject must be verified if operational. It may be 'AVE' but not working. Reset subject
Table 4–1 Fault Codes in Service Table
Technical Product Manual - DCT1900
Maintenance, Service Messages
4-3
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