Coastcom D/I Mux III System User Manual page 193

Chapter 5. Diagnostics
An understanding of the jackfields on the Dual Enhanced DSX-1 Interface and Dual CSU Interface is
helpful when performing T1 transmission testing. Refer to Figures 5-4 and 5-5 for details on the
operation of the jackfields. T1 test equipment usually accesses the system and network through a
jackfield.
Figure 5-4. Dual Enhanced DSX-1 Interface - Jackfield Block Diagram (part number 30118-102)
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