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JunosE 11.2.x Physical Layer Configuration Guide
cablelength
clock source
description
54
Enable cell scrambling (ATM interfaces only).
Assign a text description or an alias to the interface.
Use to adjust the transmit power appropriate to the length of a T3 cable.
Specify a cable length in the range 1–450 feet.
The router supports two transmit powers, one for a cable length between 1–225 feet
and another for a cable length between 226–450 feet. Therefore, it is not necessary
to know the exact size of your cable. You only need to know if the cable size is greater
than 225 feet. For example, if your cable size exceeds 225 feet, specify any number
greater than 225 and less than 451.
Example
host1(config-controll)#cablelength 300
Use the no version to restore the default, 0 feet.
See cablelength.
Use to configure the transmit clock source for a T3 or E3 line.
Use a transmit clock on the line's receive data stream, except in rare cases such as
back-to-back router tests. When performing back-to-back router tests, configure one
end of the line as internal and the other end as line.
Specify the keyword line to use a transmit clock on the line's receive data stream.
Specify the keywords internal module to use the line module's internal clock.
Specify the keywords internal chassis to use the router's clock.
Example
host1(config-controll)#clock source internal module
Use the no version to revert to the default, line.
See clock source.
Use to assign a text description or an alias to a T3 or E3 interface.
You can use this command to help you identify the interface and keep track of interface
connections.
The description or alias can be a maximum of 80 characters.
Use "show controllers t3" on page 64 or "show controllers e3" on page 64 to display
the text description.
Example
host1(config-controll)#description westford t3 interface
Copyright © 2010, Juniper Networks, Inc.
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