Alcatel-Lucent 7450 ESS-12 Configuration Manual page 402

CPM. They are configured together, but they are displayed separately in the show command.
Default
shutdown
output
Syntax output
Context config>system>sync-if-timing>bits
Description
This command provides a context to configure and enable or disable the external BITS timing reference
output to the SR/ESS router. On redundant systems, there are two possible BITS-out interfaces, one for each
CPM. They are configured together, but they are displayed separately in the show command.
Default shutdown
line-length
Syntax line-length {110,220,330,440,550,660}
Context config>system>sync-if-timing>bits
Description
This command configures the line-length parameter of the BITS output, This is the distance in feet between
the network element and the office clock (BITS/SSU). There are two possible BITS-out interfaces, one for
each CPM. They are configured together, but they are displayed separately in the show command. This
command is only applicable when the interface-type is DS1.
Default 110
Parameters 110 — Distance is from 0 to 110 feet
220 — Distance is from 110 to 220 feet
330 — Distance is from 220 to 330 feet
440 — Distance is from 330 to 440 feet
550 — Distance is from 440 to 550 feet
660 — Distance is from 550 to 660 feet
source
Syntax source {line-ref | internal-clock}
Context config>system>sync-if-timing>bits>output
Description
This command configures the values used to identity the source of the BITS (Building Integrated Timing
Supply) output. This is either the signal recovered directly from ref1, ref2 or ptp or it is the output of the
node's central clock. The directly recovered signal would be used when the BITS output signal is feeding
7450 ESS OS Basic System Configuration Guide
System Management
Page 373