Lucent Technologies FT-2000 OC-48 - Page 518

Administration and Provisioning
8-114 Issue 8.0 July 2002
command slot" to the STS-12 tributary as active and the add
cross-connection from the "3B/7B command slot" to the same
STS-12 tributary as standby. If the add cross-connection from the
"3B/5B command slot" to the STS-12 tributary was previously active
and operating unprotected (0x1), a brief service hit (<60 msec) will
be observed.
When a quad pair transitions from 1+1 protected operation to 0x1
unprotected operation, the FT-2000 OC-48 Add/Drop-Rings
Terminal automatically selects the add/drop cross-connections
between the "1B/5B command slot" and the STS-12 tributary as
active. If the add cross-connection from the "3B/7B command slot"
to the STS-12 tributary was previously active, a brief service hit (<60
msec) will be observed.
!
CAUTION:
When transitioning an OC-12 line from 1+1 protected operation to
0x1 unprotected operation, always start with the quad pair at the
tail-end of the OC-12 line. When a quad pair transitions from 1+1
operation to 0x1 operation, the FT-2000 OC-48 Add/Drop-Rings
Terminal automatically selects the add/drop cross-connections
between the "1B/5B command slot" and the STS-12/STS-12c
tributary as active. If the drop cross-connection from the
STS-12/STS-12c tributary to the "3B/7B command slot" was
previously active, the OC12 (1.3 STD) in the "3B/7B command slot"
transmits path AIS toward the OC-12 line. The receiving terminal
accepts the path AIS as a good signal, and no trouble condition is
reported.
— The Alarm Level parameter sets the severity of an incoming (from
the lightguide cross-connect panel) signal failure condition. The
choices are:
- "CR": critical
-"MJ":major
- "MN": minor
- "NA": status not alarmed
- "NR": status not alarmed and not reported to the OS.
- "NO": no failure conditions reported.
(Not applicable to slots in the 1+1 Protection Mode.)
— The Signal Degrade Threshold is the base 10 logarithm of the
OC-12 line parity (B2) error rate threshold. The allowed values are
"-5," "-6," "-7," "-8," or "-9". A signal degrade condition is reported for
OC-12 signals received from the lightguide cross-connect panel with
error rates greater than the threshold.