Cisco PA-2JT2 Installation And Configuration Manual page 15

Figure 10
Note
Referring to , attach the network ends of your two 75-ohm coaxial cables to your external DSU as
Step 2
follows:
–
–
To prevent system problems and to maintain the proper connection sequences (PA-2JT2's RX port to the
Caution
DSU's TX port and PA-2JT2's TX port to the DSU's RX port), connect the RX and TX ports on the JT2
port adapter as indicated in Steps 1 and 2.
Make the appropriate setting on your DSU to establish an external ground. (See .) Remember that the
Step 3
JT2 port adapter's TX and RX connections are grounded at the router-chassis side.
Caution To prevent system grounding and signal problems, your DSU must be set to accept an external ground
because the JT2 port adapter's TX and RX connections are grounded at the router-chassis side.
OL-3587-01
Connecting 75-Ohm Coaxial BNC Cables (Horizontal Orientation Shown)
BNC cables
To DSU's To DSU's
RX port TX port
Older A-type DSUs are not supported with PA-2JT2.
Attach the coaxial cable from the JT2 port adapter's TX0 port to the RX port on your external
DSU.
Attach the coaxial cable from the JT2 port adapter's RX0 port to the TX port on your external
DSU.
PA-2JT2 6.3-MHz Serial Port Adapter Installation and Configuration
VIP2 and the JT2 Port Adapter
JT2
15