Permanent L1 activation prevents the S0 bus from being disabled, or it prevents a reactivation after a successful deactivation.
    Important: This setting is particularly relevant if you are using a bus as a PCM sync source. If the bus is disabled, you will lose the PCM clock.
- SNMP ID:
 - 2.23.18
 - Console path:
 - Setup > Interfaces
 - Possible values:
 - Disabled
 - Sync source only
 - All TE interfaces