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
Danger
Cable Types
The cable types that are used are dependent on the Cisco VG450 Voice Gateway that you are using. For more
information, see the
“Cable Specifications and Information” section on page A-1
.
• 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:
Gigabit Ethernet Maximum Distance
The maximum segment distance for Gigabit Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).
FXS Analog Voice Port Maximum Distance
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.
Cisco 450 Voice Gateway Hardware Installation Guide
13
Planning Your Installation
Cable Types
