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Quad FLC B2, B3, and D3 Modules
ADCP-RG-61-124-09
threshold). The onboard controllers compare end-to-end settings (protected/unprotect select, master/remote
module select, and odd/even slot positions in protected configuration systems) and indicate any inconsistent
or mismatched options. The mismatch indications for Quad B2, B3, and D3 versions are shown in Table 13.
Table 13.
Option Selection Mismatch Indications
B2, B3, and D3 System Configurations (a)
Condition
Protect
Unprotect
NORMAL/UNEQPT end-to-end mismatch
Blink individually. DSl LED Green
Blink individually. DSl LED Green
NORMAL/UNEQPT work-to-protect mismatch
Minor alarm. No blink.
Not Applicable
AMI/B8ZS line code end-to-end mismatch
Blink individually. Line code LED
Blink individually. Line code LED
AMl/B8ZS line code work-to-protect mismatch
Minor alarm. No blink.
Not Applicable
BER PROT SW
(b)
Blink RMT/BER LED Yellow
Blink RMT/BER LED Yellow
PROTECT/UNPROTECT end-to-end mismatch
end-to-end mismatch
Blink RMT ALM Yellow
Blink RMT ALM Yellow
MASTER/REMOTE end-to-end (not opposite)
Blink RMT ALM Yellow
Blink RMT ALM Yellow
MASTER/REMOTE work-to-protect mismatch
Minor alarm. No blink.
Not Applicable
Odd-/EVEN slot position end-to-end mismatch
Blink RMT ALM Yellow
Not Applicable
(a) If a system has only B3 and D3 QFLC modules, the only mismatches possible are PROTECT/UNPROTECT end-to-end or
ODD/EVEN due to crossed fiber cables. The mismatches are indicated by a blinking Yellow RMT ALM LED. If an earlier
version QFLC module is installed in a system with all B3 or D3 modules, the modules revert to B2 level operation. When this
occurs, the configuration switches are red for each module and mismatches occur as shown in Table 13.
(b) BER PROT SW thresholds on Working and Protect Systems may be set differently (no mismatch possible), but end-to-end
must match. BER MIN ALM threshold select switch may be set to different positions on each module.
Operation
QFLC operation consists of alarms, Protect System switching, loopback operation, and in-service AMI/B8ZS and
DS1/E1 line changes (see Table 14).
Table 14.
Alarm Table
Alarm and LED Status
Alarm Condition (a)
Protect System
Unprotect System
Remarks
Loss of DS1/E1 line on both
Working and Protect Systems
LOS/LPBK (Red) MINOR
(Yellow)
Minor or MAJOR (Red)
Major alarm
LOS/LPBK (Red)
MINOR (Yellow)
Minor or MAJOR (Red)
Major alarm
In order to provide an alarm on a DS1/E1
receiver failure, it is recommended that
option Switch 8, positions 1 and 2, be set
to the ON position to provide a MINOR
Yellow LED and a Minor alarm. However,
Switch 8 may also be set to the MAJOR
(MAJ) position to provide a MAJOR LED
and MAJ alarm. (Does not transfer to
Protect System.)
DS1/E1 line receiver failure
(DS1/E1 line signal is present on
either Working or Protect
System.)
LOS/LPBK (Red) MINOR
(Yellow)
Minor or MAJOR (Red)
Major alarm
Loss of DS1/E1 output
MOD FAIL (Red)
MAJOR (Red)
Major alarm
If DS1/E1 receiver failure is on Working
System, service transfers to Protect
System. Alarm activation is shown above.
DS1/E1 receiver failure is not detected in
an unprotected system configuration.
MAJOR (Red)
Major alarm
If DS1/E1 output failure is on Working
System, service transfers to Protect
System.
Continued
38
September 20, 2002
Fiber Loop Converter Reference Guide