Nortel-MsCarrier-MscPassport-ExternalTimingE1MIB

Description: Defines SNMP objects for external E1 timing source configuration and synchronization on Nortel MsCarrier MscPassport switches.

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Nortel-MsCarrier-MscPassport-ExternalTimingE1MIB defines SNMP objects for external E1 timing source configuration and network clock synchronization on Nortel MsCarrier MscPassport switches, covering the E1-derived reference clock used to keep the switch's internal timing aligned with the carrier network. It exposes row status/provisioning tables for the E1 timing component, an operational-status table with an SNMP-visible operational status object, and a state table reflecting the timing source's current condition. This is a direct hardware-status monitoring function: an operator can check whether the external E1 timing reference is present, synchronized, and operational, since loss of a valid timing source can degrade clocking across the whole switch and any downstream TDM circuits. It depends on E1/G.703 physical-layer and network-synchronization (e.g., ITU-T G.810-series) concepts, layered on the Passport RowStatus/StorageType conventions. It is used on Nortel MsCarrier MscPassport switches that derive their network clock from an external E1 reference in carrier TDM/WAN environments. Engineers can download the Nortel-MsCarrier-MscPassport-ExternalTimingE1MIB file directly to load it into their MIB browser.

An operator polls mscLpEE1RowStatusTable to confirm the external E1 timing component is provisioned, then checks mscLpEE1OperStatusTable's mscLpEE1SnmpOperStatus to see whether the timing source is currently operational. mscLpEE1StateTable provides further detail on the E1 timing source's operating state, and a status showing the reference as down or degraded would indicate a loss of network timing that could introduce clock slips on TDM circuits. Continuous monitoring of this status is important for switches acting as timing references for downstream network elements.

Manages E1 external timing port configuration on Nortel MscPassport carrier systems.