Installation guide

4-74 Cisco 4000 Series Installation Guide

Network Connection Considerations

Following are the available E1-G.703/G.704 module options:

• Four port E1-G.703/G.704, 120-ohm, balanced

• Four port E1-G.703/G.704, 75-ohm, unbalanced

• E1 cable, TWINAX, 120-ohm, balanced, 5 meters

• E1 cable, DB-15, 120-ohm, balanced, 5 meters

• E1 cable, BNC, 75-ohm, unbalanced, 5 meters

G.703/G.704 Maximum Cable Lengths

Unbalanced G.703 interfaces allow for a longer maximum cable length than those speciﬁed

for balanced circuits. Table 4-6 lists the maximum cable lengths for each E1-G.703/G.704

cable type by the connector used at the network end (away from the network processor

module).

Table 4-6 E1-G.703/G.704 Maximum Cable Lengths

G.703/G.704 Cable Connections

Figure 4-26, Figure 4-27, and Figure 4-28 show the unbalanced and balanced cables used

for connection between the E1-G.703/G.704 port and your network. The port adapter end

of each cable has a DB-15 connector.

Connection Type BNC Twinax

Balanced – 300 m

Unbalanced 600 m –