AT&T 3B2 Off-Line Diagnostic Manual page 153
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Also See for 3B2:
- Maintenance reference manual (422 pages) ,
- Operation manual (415 pages) ,
- Manual (54 pages)
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- - - - - - - - - - - - - - - - - - - - - Version 3 Hardware System Board DiagnostiCS
Test Numbers:
55 through 57
Function:
These tests check transmission with different data lengths on the A side.
Procedure:
A one is walked through zeros at 7, 6, and 5 Data bits (8 already tested).
Hardware Tested:
The SCN2681 DUART is tested.
Data Returned:
The failing register number and the status of the RCVRDY and XMTRDY
Time-out bits are returned.
Notes:
None
Test Numbers:
58 through 60
Function:
These tests check transmission with different data lengths on the B side.
Procedure:
A one is walked through zeros at 7, 6, and 5 Data bits (8 already tested).
Hardware Tested:
The SCN2681 DUART is tested.
Data Returned:
The failing register number and the status of the RCVRDY and XMTRDY
Time-out bits are returned.
Notes:
None
Test Numbers:
61 and 62
Function:
These tests check transmission with different parities on the A side.
Procedure:
A one is walked through zeros at even and no parity (odd already tested).
Hardware Tested:
The SCN2681 DUART is tested.
Data Returned:
The failing register number and the status of the RCVRDY and XMTRDY
Time-out bits are returned.
Notes:
None
Test Numbers:
63 and 64
Function:
These tests check transmission with different parities on the B side.
Procedure:
Walk a one through zeros at even and no parity (odd already tested).
Hardware Tested:
The SCN2681 DUART is tested.
Data Returned:
The failing register number and the status of the RCVRDY and XMTRDY
Time-out bits are returned.
Notes:
None
SYSTEM BOARD DIAGNOSTICS 3-113
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