Hitachi GR2000 - Manual (Page 204)

Figure 3-103 shows the cable specifications.
Figure 3-103 UTP Cable Specifications for 25Mbps ATM
UTP category 3/4/5, 4-core/8-core, 2-pair straight
8-pole modular
connector (RJ-45)
Recommended model name: Hitachi UTP Cable C5E-PCTA-P8/P8-[ ]M (cord length in brackets)
Boundary with network: router’s connector
8-pole modular
connector (RJ-45)