Alcatel-Lucent 1850 TSS-5 continuously monitors incoming signals and internal system conditions. Incoming SONET/SDH signals are monitored for loss of signal (LOS), loss of frame (LOF), loss of pointer (LOP), line AIS, path AIS (only rings will be switched due to path AIS), bit error ratio (BER) thresholds and unequipped signals. The BER threshold crossings are detected for DS1, DS3, E1, E3, VT1.5, VC-12, VC-3 (low-order), VC-4, VC-4-4c, OC-3, STM-1, OC-12, STM-4, OC-48, STM-16, STS-1, STS-3c, and STS-12c signals.
Ethernet faults/errors, dropped frames, CRC errors, alignment errors, and collisions associated with the VLNC40/VLNC42/VLNC42B/VLNC60/VLNC61/VLNC62/VLNC64 circuit packs are monitored using SNMP MIBs. See SNMP interface for complete details.
In addition to detecting line and path faults, the system also detects internal circuit pack faults. When an internal fault is detected, automatic diagnostics isolate the faulty circuit pack. Faults are reported to local technician and OSs so that technician dispatch and repair decisions can be made. If desired, OS personnel and local technicians can use the CIT to gain more detailed information on the fault condition.
Service OAM provides carrier-grade fault detection.
All detected fault conditions are stored and are available to be reported on demand. In addition, a history of past alarm and status conditions and events is maintained and available for on-demand reporting. Each event is real-time and date stamped.
Service OAM provides carrier-grade fault isolation.
Alcatel-Lucent 1850 TSS-5 reports all detected alarm and status conditions through the appropriate office alarm relays, SYSCTL faceplate LEDs, transmission circuit pack LEDs, and TL1 interfaces.
The b-3 DS3 port of the VLNC50/52/55 SONET/SDH Transport circuit pack also transmits a limited set of Far End Alarm Channel (FEAC) codes (defined in ANSI T1.107) toward the DSX panel during certain alarm conditions (for example, DS3 loss of signal or equipment failure). The b-3 DS3 port must be channelized with cbit formatting.
In order to minimize the number of alarm conditions reported by the NE, Alcatel-Lucent 1850 TSS-5 automatically masks (suppresses the reporting of) alarms of the same root cause. Alarms/status conditions of the same root cause are arranged in a hierarchical order. When more than one alarm or status condition in a hierarchical group exists in a single NE, only the top level condition in that hierarchy is reported.
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