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JUNOSe 11.1.x Physical Layer Configuration Guide
Configuring Fractional T3
You can configure fractional T3 on T3 frame interfaces. E3 frame interfaces do not
support fractional E3.
Fractional T3 is a portion of a T3 transmission service and provides a set of lines
with a speed that is greater than T1 (1.544 Mbps), but less than T3 (44.736 Mbps).
To configure fractional T3:
1.
2.
3.
CAUTION: Complete all three steps at the same time. Otherwise, the interface might
drop packets unexpectedly.
dsu bandwidth
dsu mode
56
Configuration Tasks
Use the no version to restore the default value.
See framing.
Set the DSU mode for the lines.
Set the speed of the fractional T3 lines.
Enable scrambling of the payload.
Use to set the speed for the fractional T3 lines.
If you issue this command, be sure to issue the dsu mode and scramble
commands. Otherwise, the interface might drop packets unexpectedly.
The router offers a set of speeds in increments that depend on the DSU mode
you specify. The actual speed of the fractional T3 lines will be the value closest
to the fractional bandwidth you specify.
Example
host1(config-controll)#dsu bandwidth 10000
Use the no version to clear the bandwidth.
If you issue the no version, be sure to issue the no dsu mode and no scramble
commands. Otherwise, the interface might drop packets unexpectedly.
See dsu bandwidth.
Use to set the DSU mode for the lines.
Specify 0 for Digital Link mode or 2 for Larscom mode.
If you issue this command, be sure to issue the dsu bandwidth and scramble
commands. Otherwise, the interface might drop packets unexpectedly.
Example
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