CC1/CC2 Inputs


When the TimeHub is set up as a remote shelf the input timing reference must be composite clock. The Input Port Status screen shown below provides a view of the port settings described in the following table. Click Edit to change the settings.

Item

Description

CC Input

Indicates the port number.

State

Indicates if the port is enabled or disabled as an input timing reference.

Status

Displays one of the following port status indications:

  • ACTIVE

  • QUALIFIED

  • NOT QUALIFIED

  • INPUT LOS

  • IMPAIRMENT

  • DISABLED

Priority

Displays the priority setting (0 through 9). The priority setting provides a way to prefer a particular input for use as the active timing reference when more than one input has been qualified. The lower the number, the higher the priority. The default is that the PRS input has highest priority and all others are equal.

Assumed SSM

Displays the assumed SSM quality level. The assumed SSM level 1 to 9 is used when SSM is disabled. The values are as follows:

  1. Stratum 1 Traceable (PRS)

  2. Synchronized – Traceability Unknown (STU)

  3. Stratum 2 Traceable (ST2)

  4. Transit Node Clock Traceable (TNC)

  5. Stratum 3E Traceable (ST3E)

  6. Stratum 3 Traceable (ST3)

  7. SONET Minimum Clock (SMC)

  8. Stratum 4 Traceable (ST4)

  9. Do not use for synchronization (DUS)