3-12 Riverstone Networks RS 3000/3100/3200 Switch Router Getting Started Guide
Installing the Hardware Hardware Installation
Setting Jumpers on the Clear Channel T3/E3 WICs
Both the Clear Channel T3 and E3 WICs contain a set of jumpers (JP2, JP3,and JP4). These jumpers allow you to set
whether the shielding of the transmit (Tx) and Receive (Rx) cables are grounded. In their default positions, the jumpers
are set such that the shielding on the Tx cable is grounded at the RS and the shielding on the Rx cable is not grounded
at the RS (see Table 3-2 and Figure 3-10).
To Ground the Shielding on the Rx Cable – Remove the jumper block on JP4 and place it on the pins of JP3.
Note The industry standard for E3 is both Tx and Rx cable shielding grounded. To be
E3 industry-compliant, the jumper block must be moved from JP4 to Jp3.
To Remove Grounding of the Shielding on the Tx Cable – Remove the jumper block on JP2.
Table 3-2 Jumper default settings
Jumper Default Position Setting
JP2 Jumper block in place Shielding on Tx cable is grounded at the RS
JP3 No jumper block in place (open) Shielding on Rx cable is not grounded at the RS
JP4 Jumper block in place Storage jumper for jumper block to be used on JP3