Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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T1 Channels
A T3 line consists of 28 T1 channels (or data streams). A T1 channel is identified by
its number in the range 1–28.
Each T1 channel is an aggregate of 24 DS0 timeslots, as shown in Figure 2 on page
8. To configure an entire T1 line, assign 24 timeslots to each channel.
Figure 2: T1 Channels and DS0 Timeslots on a T3 Line
Fractional T1
Fractional T1 is a portion of a T1 line. To configure fractional T1 on a channelized
T3 interface, you assign a range of DS0 timeslots to a T1 channel and
subchannel . A
subchannel is group of timeslots. Subchannel numbers range from 1–24 and do not
necessarily correspond to DS0 timeslots. The subchannel number identifies a fractional
T1 channel.
For example, you might make the assignments for subchannels 1–6 as listed in Table
5 on page 8.
Table 5: Sample T1 Subchannel/Timeslot Assignments
DS0 Timeslot Subchannel
1–4, 10, 22–24 1
5–6 2
7–9 3
11 4
12–15, 20–21 5
16–19 6
To configure the subchannels listed in Table 5 on page 8, use the following command
to specify the T3 controller in chassis slot 0, port 1.
host1(config)#controller t3 0/1
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Platform Considerations
JUNOSe 10.0.x Physical Layer Configuration Guide