Hitachi GR2000 - Manual (Page 194)

Note: This connection requires costs for extra connection work and modular rosette in addition to those
for ordinary cabling and DSU setup. For details of the connection work, consult the carrier (e.g., NTT) .
Figure 3-89 Connection to Device without Terminator
3.10.2.2 UTP Cable for Primary (I.431 or I.431-a)
For connection to the Primary (I.431 or I.431-a) interface, a UTP Category 3, 4, or 5
cable shown in Figure 3-90 is required. Figure 3-91 shows an example of indirect
connection between the router and the DSU via a modular rosette on this interface.
Device without
terminator DSU
Flat metal cable (4-wire)
Modular rosette
without terminator Modular rosette
with terminator
For indirect connection to DSU via modular rosette
UTP category 3/4/5, 4-core, twisted-wire, straight