Figure 9: Sonet Multiplexing; Table 10: Tributary Standards That Cocx/Stmx Interfaces Support - Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual

JunosE 11.2.x Physical Layer Configuration Guide
110
NOTE: To configure a whole T1 or E1 line, assign 24 T1 or 31 E1 timeslots to a channel
group or configure an unframed E1 line.
To identify a controller over SONET/SDH VT, you must consider the multiplexing for
SONET and SDH virtual tributaries. In SONET, an STS-1 frame can be divided into seven
virtual tributary (VT) groups. Similarly, for SDH, an STM-0 frame can be divided into
seven tributary units (TUs). Each group or unit contains a number of virtual tributaries;
that number depends on the VT type or TU name. Table 10 on page 110 lists the VT types
and TU names that the router supports.

Table 10: Tributary Standards That cOCx/STMx Interfaces Support

VT Type
(SONET) TU Name (SDH)
VT1.5 TU-11
Not supported TU-12
Figure 9 on page 110 shows the structure for SONET, and Figure 10 on page 111 shows the
structure for SDH.

Figure 9: SONET Multiplexing

Number of
Tributaries in a Group Signal Standard
4 T1
3 E1
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