Automatic channel state provisioning is a capability provided on Alcatel-Lucent 1850 TSS-5 NEs that are equipped with SYSCTL, VLNC35, and VLNC50/52/55 circuit packs. It suppresses reporting transient alarms and events during provisioning by supporting multiple states (AUTO, IS, NMON) for SONET VT1.5 and STS-n, and SDH VC-n channels.
While an end-to-end circuit is being set up, particularly during SONET VT1.5 and STS-n, and SDH VC-n cross-connect provisioning, several transient maintenance signals result. Without automatic channel state provisioning, these are reported as alarms and events. You can generally ignore these transient alarms, and initiate corrective action only if the alarms persist after the provisioning is completed. To avoid the confusion created by this, Alcatel-Lucent 1850 TSS-5 provides automatic channel state provisioning.
A VC-n, VT1.5, STS-1, or STS-3c channel is kept in the default automatic (AUTO) state or, for pass-through connections, the default not-monitored (NMON) state until the reception of a valid signal (a framed non-AIS, non-LOP, or non-UNEQ). A channel state transition from the AUTO state is based on the absence of all monitored path level defects in that channel. While in the AUTO state, no alarms or events are reported on the channel. On receiving a valid signal, the channel automatically changes to the in-service (IS) state, where it resumes normal alarm and event reporting. An additional state, not-monitored (NMON), is also supported in which alarm and event reporting is suppressed regardless of the validity of the signal being received on the channel. The user can submit commands to manually change a channel from IS or AUTO to NMON, and from NMON to AUTO. A user cannot manually change from AUTO or NMON to IS. In a UPSR/SNCP ring, the state will go from AUTO to IS as soon as a good signal is received on either side of the ring.
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