R2511-HP MSR Router Series Interface Command Reference(V5)

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short length: Matches a cable length shorter than 199.6 meters (655 feet). The argument length can take
133ft , 266ft, 399ft, 533ft, or 655ft, depending on the actual transmission distance.
Usage guidelines
You can use this command to adapt the signal waveform to different transmission conditions such as the
quality of the signal received by the receiver. If signal quality is good, use the default setting.
Examples
# Set the cable length to 40.5 meters (133 feet) on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0]ft1 cable short 133ft
ft1 clock
Use ft1 clock to configure the clock source for the T1-F interface.
Use undo ft1 clock to restore the default.
Syntax
ft1 clock { master | slave }
undo ft1 clock
Default
The clock source for the T1-F interface is line clock.
Views
T1-F interface view
Default command level
2: System level
Parameters
master: Adopts the internal clock as the clock source.
slave: Adopts the line clock as the clock source.
Usage guidelines
When the T1-F interface is operating as DCE, choose the internal clock for it. When it is operating as DTE,
choose the line clock for it.
When the T1-F interfaces on two routers are directly connected, one interface must operate in master
clock mode to provide the clock source and the other in slave clock mode to accept.
When the T1-F interface on your router is connected to a switch, it is operating as DTE and therefore must
be configured with the slave clock mode to accept the line clock provided by the switch operating as
DCE.
Examples
# Use the internal clock as the clock source on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 clock master