Maintenance 5-217
Installing and Configuring Processor Modules
Figure 5-20 Location of Jumper J6 on the E1 Port Adapter—Partial View
Table 5-11 E1 Port Adapter Jumper J6 Settings and Functions
Warning
To prevent problems with the E1 interface and to reduce the potential for injury, jumper J6
should be installed by trained service personnel only. For either impedance option, a jumper installed
at J6 bypasses the AC-decoupling capacitor to ground, thereby coupling the interface directly to AC.
This is a setting that could pose a risk of severe injury. By default and for safety, J6 has no jumper
installed.
After you set jumper J6, proceed to the section “Removing and Replacing MIP Port Adapters” in
this chapter.
Pins and Impedance Function
1 and 2 for 120 ohm
2 and 3 for 75 ohm
Controls capacitive coupling for either 120-ohm or 75-ohm operation. An installed
jumper directly connects the Rx shield to chassis ground.
CR3
CR1
DS2
123
J6
J7
T2
T1
Spare
jumpers
H2739
Cable
connector
Jumper
J6
E1 port adapter
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