Cisco 2525 Подготовка к установке - Страница 12

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Preparing to Connect to a Network

Table 2-3

Description

Line rate

Data rates

Standards

1. Mbps = megabits per second.

2. The T1 interface is not channelized.

ISDN Connections

Use an appropriate cable (not included) to connect the router directly to an ISDN. (See

Table 2-4.) Refer to the section "ISDN BRI Port and Cable Pinouts" in the appendix

"Cabling Specifications for the Cisco 2524 and Cisco 2525 Routers" for port and cable

pinouts.

Note the following warnings:

Warning

switched 56 cables. If you detach the cable, detach the end away from the router first to

avoid possible electric shock. Network hazardous voltages are also present in the area of

the BRI (RJ-45), fractional T1/T1 (RJ-48C), and switched 56 (RJ-11 or RJ-48S) ports,

regardless of whether power is OFF or ON. (To see translated versions of this warning, refer

to the appendix "Translated Safety Warnings.")

Warning

inaccessible to user contact. Do not attempt to tamper with or open any public telephone

operator (PTO)-provided equipment or connection hardware. Any hardwired connection

(other than by nonremovable, connect-one-time-only lug) must be made only by PTO staff

or suitably trained engineers. (To see translated versions of this warning, refer to the

appendix "Translated Safety Warnings.")

Table 2-4 lists the specifications for ISDN BRI cables.

2-12 Cisco 2524 and Cisco 2525 Router User Guide

Fractional T1/T1 DSU/CSU WAN Module Network Specifications

Specification

1.544 Mbps

x 56 or

x 64 kbps, where

AT&T Publication 62411, 54016, and 43801

Network hazardous voltages are present in the BRI, fractional T1/T1, and

The ISDN connection is regarded as a source of voltage that should be

= 1 to 24