Cisco ONS 15454 SDH Specifications Page 29

  • Download
  • Add to my manuals
  • Print
  • Page
    / 262
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 28
1-5
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 1 Alarm Troubleshooting
Trouble Notifications
1.2.1 Alarm Type/Object Definition
1.3 Trouble Notifications
The ONS 15454 SDH uses ITU-compliant categories to characterize alarm levels. In CTC, the Critical,
Major, and Minor ONS 15454 SDH alarms are reported in the Alarms tab. This tab contains alarms such
as loss of signal (LOS) indicating problems a user must correct. The ONS CTC Conditions tab contains
ONS 15454 SDH conditions as well as alarms. If a condition is not listed in the Alarms tab as well, it is
a notification and does not require user action.
Alarms are further-divided into Service-Affecting (SA) and NSA status.
An SA failure affects a
provided service or the network’s ability to provide service. For example, a missing transmitter
(TRMT-MISS) alarm is characterized as an SA failure. TRMT-MISS occurs when the cable connector
leading to a port on an active E1-N-14 card is removed. This affects a provided service, because traffic
switches to the protect card. The high temperature (HITEMP) alarm, which means the ONS 15454 SDH
is hotter than 50 degrees Celsius (122 degrees Fahrenheit), is also an SA failure. For example, although
a particular E1 port may not be affected, a high temperature affects the network’s ability to provide
service.
1.3.1 Conditions
When an SA failure is detected, the ONS 15454 SDH also sends an alarm indication signal (AIS)
downstream. When it receives the AIS, the receiving node sends a remote failure indication (RFI)
upstream. AIS and RFI belong in the conditions category and are shown on the Conditions tab of the
ONS 15454 SDH. The condition reporting is not ITU-compliant.
Table 1-3 Alarm Type/Object Definition
BITS Building integration timing supply (BITS) incoming references (BITS-1, BITS-2)
BPLANE Backplane
E1 E1-N-14 card
E3 E3-12 card
EQPT A card in any of the 17 card slots. This object is used for alarms that refer to the card
itself and all other objects on the card including ports, lines, and VC
ETHER Ethernet
FAN Fan-tray assembly
NE The entire network element (SYSTEM)
NERINGSDH SDH NE
1
ring
1. Network element
NESYNCHSDH SDH NE synchronization
STMN Synchronous Transfer Mode (speed
Page view 28
1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 261 262

Comments to this Manuals

No comments