Specifications

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Cisco 7100 Series VPN Router Installation and Configuration Guide
78-6341-03
Chapter 3 Installing a Cisco 7100 VPN Series Router
Connecting to the Network
The Cisco 75-ohm coaxial cable is available only in 10-foot (3.05-meter) lengths. The typical maximum
distance between stations for T3 and E3 transmissions is 1300 feet (396 meters).
Note For E3 (75-ohm) connections, you must have ferrite beads on the 75-ohm coaxial cable and
electromagnetic interference (EMI) decoupling clips on the receiver end of the cable (see Figure 3-12)
if compliance with European certification standards for emission control is required
(EN55022/CISPR22 Class B for radiated emission levels).
Note The T3 and E3 ports support several types of integrated DSUs. For a listing of the interoperability
guidelines, see Appendix C, “Cable Specifications.”
To connect the T3 or E3 port to the network, use the following procedure:
Step 1 Attach the appropriate coaxial cable directly to the receptacle on the router. (See Figure 3-11 and
Figure 3-12.)
Step 2 Attach the network end of the cable to the external synchronous serial equipment.
Figure 3-11 Connecting the T3 WAN Serial Ports on the Cisco 7140-2T3
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