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Setting the PA-2CE1 Jumpers
Setting the PA-2CE1 Jumpers
Depending on the circumstances, you might need to change the configuration of both PA-2CE1
interfaces for balanced 120-ohm connections or unbalanced 75-ohm connections.
Configuring PA-2CE1 interfaces for balanced 120-ohm or unbalanced 75-ohm connections requires
setting ten jumpers on the 2CE1 printed circuit board and attaching the appropriate interface cable
(balanced or unbalanced) to both 2CE1 ports. See the "Cables, Connectors, and Pinouts" section on
page 1-3 for 2CE1 interface cable types. The following steps explain how to set 2CE1 jumpers for
balanced 120-ohm or unbalanced 75-ohm connections.
Note
Both 2CE1 ports must be configured for balanced 120-ohm or unbalanced 75-ohm
connections. The PA-2CE1 does not support a mixed connection configuration.
Step 1
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Step 2
Remove the VIP2 from the chassis. To do so, follow the steps in the section "Removing a VIP2" in the
configuration note Second-Generation Versatile Interface Processor (VIP2) Installation and
Configuration, which shipped with your VIP2.
Step 3
Remove the installed PA-2CE1 from the VIP2. See the "VIP2—Removing and Installing a Port Adapter"
section on page 3-6 for port adapter removal procedures.
Step 4
With the PA-2CE1 on an antistatic mat, use a number 1 Phillips screwdriver to remove the three screws
that secure the plastic jumper cover to the 2CE1 printed circuit board. (See Figure 3-3.) Save the screws.
Figure 3-3
Step 5
Set the ten jumpers on the 2CE1 printed circuit board for balanced 120-ohm or unbalanced 75-ohm
interface connections.
Jumper locations J2, J3, J5, J8, J9, J11, J12, and J14 have three pins, and jumper locations J4 and J10
have two pins. Each jumper location is configured by placing an insulated jumper over two pins (leaving
the third pin of a three-pin jumper location exposed). In balanced 120-ohm configurations, the insulated
jumper covers both pins of jumper locations J4 and J10. In unbalanced 75-ohm configurations, the
PA-2CE1 Channelized E1 Port Adapter Installation and Configuration
3-8
Removing the Jumper Cover (Bottom View of the PA-2CE1)
Port 0
J2
J8
J3
J5
Port 1
J14
J11
J4
J9
J10
J12
Chapter
Plastic jumper
cover screws
Plastic jumper
cover
OL-3519-01
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