Nortel DMS-100 Series Maintenance Manual page 99
Subscriber carrier module-100s
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Also See for DMS-100 Series:
- Replacement procedures (1100 pages) ,
- Maintenance manual (762 pages) ,
- Manual (543 pages)
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Scenario 3
The A-link is ManB. The protection link is INSV and available. A fault is
not present on the A-link.
A fault occurs on the A-link toward the SMS.
The protection link is not switched.
Note: The SMS does not scan for near-end faults on the A-link because
the link is ManB. The SMS does not know the A-link fault is present.
Scenario 4
The C-link is ManB. The A-, B- and D-links are INSV. The protection link
is INSV and available. Faults are not present on any DS-1 link.
The RCS detects a fault on the C-link.
The protection link is not switched for the ManB link.
The RCS detects a fault on the B-link.
A protection switch cannot occur because the RCS already detected a
fault on the C-link. This action is a result of RCS protection switching
functionality.
The B-link is system busied.
Scenario 5
The C-link is ManB. The A-, B- and D-links are INSV. The protection link
is INSV and available. Faults are not present on any DS-1 link.
A fault occurs on the C-link toward the SMS.
The protection link is not switched for the ManB link.
The SMS detects a fault on the B-link.
The protection link is switched to the B-link.
Scenario 6
The C-link is ManB. The RCS detects a fault on the C-link. The A-, B- and
D-links are INSV. The protection link is INSV and not in use.
The SMS detects a fault on the D-link.
A protection switch does not occur because of an RCS design result.
The D-link is system busied.
DMS-100 Family SMS Maintenance Manual XPM10 and up
Maintenance overview 1-83
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Troubleshooting
