Hitachi GR2000 Series Installation Manual page 379

After the hardware installation is complete, initial setup of this router from the se
console is mandatory. To prepare for this operation, connect the setup console to
router's RS-232C port with a cross cable having 9-pin D-sub female connectors o
both ends. Figure 6-71 below shows an example with GR2000-10. If the router's B
is duplexed, then the router has two ports for the setup console connection, activ
and standby.
Cross cable with 9-pin D-sub
female connectors on both ends
BCU (RM), duplexed