Cisco 4500M Guía de instalación descargar pdf (Pagina 59)

Making External Connections to Cisco 4000 Series Routers 4-61

Network Connection Considerations

Figure 4-13 Token Ring Cable Connections

Serial Connections

When setting up your router, consider distance limitations and potential electromagnetic

interference (EMI) as deﬁned in the Electronic Industries Association’s (EIA) and

Telecommunications Industry Association (TIA) standards, such as EIA/TIA-232.

Serial Line Distance Limitations

Serial signals can travel a limited distance at any given bit rate; generally, the slower the

baud rate, the greater the distance. All serial signals are subject to distance limits, beyond

which a signal degrades signiﬁcantly or is completely lost. Table 4-5 lists the

IEEE-recommended maximum speeds and distances for each serial interface type;

however, you may get good results at speeds and distances greater than those listed. For

instance, the recommended maximum rate for V.35 is 2 Mbps, but 4 Mbps is commonly

Media attachment unit

EEE 802.5 connector

Token Ring

lobe cable

(not included)

9-pin

D connector

Router

(rear view)

Token Ring port

H1569a

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Cisco 4500M Guía de instalación Pagina 59