Installation guide

4-72 Cisco 4000 Series Installation Guide

Network Connection Considerations

Figure 4-24 Router Serial Cable Connections

Note Serial ports conﬁgured as DCE must also be conﬁgured with the clockrate

command. An error message will be generated if there is a mismatch between the cable and

the software conﬁguration of the port—for example, if the cable is DTE and the clock rate

is set, or if the cable is DCE and the clock rate is not conﬁgured. For more information on

software commands, refer to the Cisco IOS conﬁguration guides and command references.

G.703/G.704 Interface Connections

The G.703/G.704 network processor module is conﬁgured at the factory with four

E1-G.703/G.704 interface ports. Each port provides one 15-pin, D-shell (DB-15)

receptacle, which supports only E1-G.703/G.704 interfaces. (See Figure 4-25.)

Modem

CSU/DSU

H1037a

Chassis

Serial transition

cable

EIA/TIA-232, EIA/TIA-449, V.35,

X.21, or EIA-530 connector

Serial port

50-pin connector