Specifications

8-48
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 8 Performance Monitoring
Performance Monitoring for Optical Cards
Table 8-46 Near-End SONET Path H-byte PMs for the OC-48 and OC-192 Cards
Parameter Definition
Note On CTC, the count fields for PPJC and NPJC PMs appear white and blank unless they are
enabled on the Provisioning > Line tabs. For procedures, see Enable Pointer Justification Count
Performance Monitoring, page 8-13.
PPJC-Pdet
Positive Pointer Justification Count, STS Path Detected (PPJC-Pdet) is a
count of the positive pointer justifications detected on a particular path on
an incoming SONET signal.
NPJC-Pdet
Negative Pointer Justification Count, STS Path Detected (NPJC-Pdet) is
a count of the negative pointer justifications detected on a particular path
on an incoming SONET signal.
PPJC-Pgen
Positive Pointer Justification Count, STS Path Generated (PPJC-Pgen) is
a count of the positive pointer justifications generated for a particular path
to reconcile the frequency of the SPE with the local clock.
NPJC-Pgen
Negative Pointer Justification Count, STS Path Generated (PPJC-Pgen) is
a count of the negative pointer justifications generated for a particular
path to reconcile the frequency of the synchronous payload envelope
(SPE) with the local clock.
Table 8-47 Near-End Line Layer PMs for the OC-48 and OC-192 Cards
Parameter Definition
For information about Troubleshooting UPSR switch counts, see the alarm troubleshooting
information in the Cisco ONS 15454 Troubleshooting and Maintenance Guide, Release 3.2. For
information about creating circuits that perform a switch, see Chapter 6, “Circuits and Tunnels.”
PSC (BLSR)
For a protect line in a 2-fiber ring, Protection Switching Count (PSC)
refers to the number of times a protection switch has occurred either to a
particular span’s line protection or away from a particular span’s line
protection. Therefore, if a protection switch occurs on a 2-fiber BLSR, the
PSC of the protection span to which the traffic is switched will increment,
and when the switched traffic returns to its original working span from the
protect span, the PSC of the protect span will increment again.
PSC (1+1 protection)
In a 1 + 1 protection scheme for a working card, Protection Switching
Count (PSC) is a count of the number of times service switches from a
working card to a protection card plus the number of times service
switches back to the working card.
For a protection card, PSC is a count of the number of times service
switches to a working card from a protection card plus the number of
times service switches back to the protection card. The PSC PM is only
applicable if revertive line-level protection switching is used.
PSD
For an active protection line in a 2-fiber BLSR, Protection Switching
Duration (PSD) is a count of the number of seconds that the protect line
is carrying working traffic following the failure of the working line. PSD
increments on the active protect line and PSD-W increments on the failed
working line.