Nortel Networks DCT1900 manual Fault Codes in Service Table

Technical Product Manual - DCT1900

Maintenance, Service Messages

Fault	Service	Fault	Description
Code	class	Threshold
1	2	5	Unexpected message/primitive. Message received but not within specified time
2	1	99	Board/CPU communication error or time out. Message corrupted or not received
3	2	99	Threshold fault counter or Reset counter exceeded
4	3	1	Board controller ROM error
5	3	1	Board controller RAM error
6	3	2	Internal loopback error
7	2	5	Peripheral state error
			- State of peripheral differs from state listed in CPU data base
8	1	30	Base Station not present
			- wiring fault or power lost
9	3	2	Peripheral ROM error
10	3	2	Peripheral RAM error
11	2	99	Peripheral status unknown. Two simultaneous faults: status can not be obtained
12/13	2	99	Board status unknown. No communication with board: status can not be obtained
14	2	5	Peripheral communication error or time out. Message corrupted or not received
15	2	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
16	1	10	Board controller poll response error
17	3	99	CPU main processor RAM error
18	3	99	CPU main processor ROM error
19	3	99	CPU EEPROM error
20	2	1	CPU real time clock test failed
21	3	2	CPU–poll processor (8031) RAM error
22	3	2	CPU–poll processor (8031) ROM error
23	1	2	CPU–poll processor communication error
26	2	5	CPU internal buffer overflow
27	2	99	Board controller watchdog reset
28	1	2	HSCX error. Serial communication controller on CPU of signalling highway
29	3	99	Signalling highway down. No communication between CPU and all other boards
33	1	1	Initialization procedure not successful. Due to e.g.: no communication with board
34	1	99	Portable Telephone related circuit not present. LTC or DTU–channel
35	2	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
36	2	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
37	1	4	Layer 2 fault at link with PBX: No multiframe synchronization, L1=AVE, L2=MFG
			- see note at fault 35
38	1	2	DTU or DLU hardware failure
39	1	99	PC communication error
			- when statistics runs, logging is stopped. Statistics must be set "ON" again.
40	3	3	SPU parameters on board have wrong checksum
41	2	99	System Sync Delay hardware out of lock
50	1	*	Minimum configuration error, see Chapter 2, Paragrah 2.4.1, "Backplane Reset"
51	2	*	Subject is unreliable. Fault is not continuously present
52	2	*	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

*Not handled by tam_dbas, so threshold is effectively infinite

Table 4–1 Fault Codes in Service Table

Maint-DCT1900/R8/mw	4-3
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