ADTRAN 4200659L5, 4200659L1, 4175043L2, 4200659L8 Timing Status, Clock Status, Current Source

Chapter 4. Status

TIMING STATUS

The following entries describe the state of the transmit timing subsystem, including the status of the selected reference clock(s), availability and status of the external clock sources, timing acquisition status, and internal clock failures.

Clock Status

This entry describes the condition of the clock synchronization circuitry. The clock status can be any of the following values:

•NORMAL – clock synchronization is operating normally.

•RECOVERING – clock synchronization is in the process of recovering from a fault.

•LOSS OF SOURCE – the reference clock source has become invalid

•OUT OF RANGE – the clock synchronization circuit is unable to track the reference source.

•OUT OF LOCK – the clock synchronization circuit is unable to lock to the reference source.

Current Source

Indicates the source of the clock. The values for the clock source are:

•LOOP – indicates that timing is currently being derived from the STS-1 receive signal.

•PRI EXT – indicates that timing is currently being derived from the source assigned to the primary external clock source.

•SEC EXT – indicates that timing is currently being derived from the source assigned to the secondary external clock source.

•FREE-RUN– indicates that transmit timing is currently being derived from an internal +/-20 ppm (Stratum 4) SONET minimum clock source.

4-8 MX2800 STS-1 User Manual 61200659L1-1