Installation guide

Making External Connections to Cisco 4000 Series Routers 4-73
Network Connection Considerations
Figure 4-25 G.703/G.704 Serial Network Processor Module Ports (DB-15)
The G.703/G.704 network processor module uses a DB-15 receptacle for both the balanced
and unbalanced ports. You must connect the correct type of interface cable; otherwise the
port will not operate.
The G.703/G.704 network processor module end of all E1-G.703/G.704 adapter cables is
a DB-15 connector. At the network end, the adapter cable for unbalanced connections uses
a BNC connector. The adapter cables for balanced mode are available with several
connector types to accommodate connection standards in different countries.
You must use the proprietary cables to connect the E1-G.703/G.704 port to your network.
Cables for balanced and unbalanced modes are available with the following types of
network-end connectors:
• Unbalanced (75-ohm) coaxial cables with BNC connectors at the network end (used
primarily for connection in the United Kingdom), see Figure 4-26.
• Balanced (120-ohm) with a DB-15 connector at the network end, see Figure 4-27.
• Balanced (120-ohm) twinaxial split cable at the network end, with separate transmit and
receive cables, each with a twinax connector, see Figure 4-28.
In addition to these cables, some connections require bare-wire connections (directly to
terminal posts).
Alignment
groove
Alignment
groove
H2792
PORT-3 PORT-2
PORT-1 PORT-0
P-3
P-1
P-2
P-0
P-3 P-2 P-1`
P-0
LP CN TD TC RD RC LP CN TD TC RD RC LP CN TD TC RD RC LP CN TD TC RD RC
LEDs
DB-15
female
ports
DB-15
female
ports
E1
E1