Hitachi GR2000 Series Installation Manual page 195

Primary (1.431)
DSU
interface
outer
Figure 3-91 Sample Indirect Connection with Primary (I.431 or I.431-a)
Configuration Notes:
• Customer setup length L1, i.e., the total length of flat metal cables, should not exceed 16 m - L2.
addition, be sure to use the flat metal cable with the core diameter of 0.65 mm.
• The modular rosette is the customer responsibility, and hence not included in the router. Procure
that has the model name MJ-8S (no terminator).
Customer setup length L1 (with one modular rosette)
Flat metal cable (4-wire)
Customer setup length L2
(cable with modulars on both ends)