Cisco 450 Руководство по установке оборудования - Страница 15

Просмотреть онлайн или скачать pdf Руководство по установке оборудования для Шлюз Cisco 450. Cisco 450 37 страниц. Voice gateway

Planning Your Installation

Danger

Read the installation instructions before you connect the system to its power source. Statement 1004

Danger

This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the

protective device is rated not greater than:120 VAC, 15A U.S. (240 VAC, 10A international) Statement 1005

Danger

The device is designed for connection to TN and IT power systems. Statement 1007

Danger

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only

through the use of a special tool, lock and key, or other means by security. Statement 1017

The cable types that are used are dependent on the Cisco VG450 Voice Gateway that you are using. For more

information, see the

• GE cables (RJ-45 to RJ-45 straight-through cables)

• Analog voice cables (RJ-21)

Distance Limitations for Interface Cables

When planning your installation, consider distance limitations and potential electromagnetic interference

(EMI) as defined by the Electronic Industries Association (EIA). Distance limitation information is included

for the following VG ports:

The maximum segment distance for Gigabit Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).

The maximum distance is established by a total allowable loop resistance (including the phone or terminal

equipment) of 600 ohms.

FXS-E (Extended loop) Analog Voice Port Maximum Distance

The maximum distance is established by a total allowable loop resistance (including the phone or terminal

equipment) of 1400 ohms.

"Cable Specifications and Information" section on page A-1

Cisco 450 Voice Gateway Hardware Installation Guide

Cable Types