2-2
Cisco VG202 and Cisco VG204 Voice Gateways Hardware Installation Guide
OL-15959-01
Chapter 2 Planning Your Installation
Distance Limitations for Interface Cables
Desktop Mounting
If the voice gateway is placed on a desktop, do not stack other equipment or paper on the chassis. Provide
plenty of space for air circulation at all four sides of the gateway. Inadequate ventilation can result in
overheating and damage.
Access to Chassis
Allow space at the back of the chassis for cable connections. Also consider the need to access the chassis
for future upgrades, maintenance, and troubleshooting.
Power Source
Warning
Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Warning
Read the installation instructions before you connect the system to its power source.
Statement 1004
Warning
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
Warning
The device is designed for connection to TN and IT power systems.
Statement 1007
Cable Types
For information on cable types, see the white papers associated with this product.
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 voice gateway ports:
• Fast Ethernet Maximum Distance, page 2-2
• FXS Analog Voice Port Maximum Distance, page 2-3
Fast Ethernet Maximum Distance
The maximum segment distance for Fast Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).
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