
About Line Protocols
115391-A Rev. A 2-23
Figure 2-11. Bipolar with 8-Zero Substitution
DSU/CSU
The Data Service Unit (DSU) provides the connection necessary for the DTE to
connect to the T1 or E1 facility.
Line voltage
Data
11 100000
0000
Substituted byte
Bipolar
violation
LS0010A
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