Interference Considerations
When wires are run for a significant distance, there is a risk that stray signals will be induced on the wires as
interference. If interference signals are strong, they can cause data errors or damage to the equipment.
The following sections describe sources of interference and how to minimize its effects on the Cisco ASR
1001-HX Router and Cisco ASR 1002-HX Router.
Electromagnetic Interference
All the equipment powered by AC current can propagate electrical energy that can cause electromagnetic
interference (EMI) and possibly affect the operation of other equipment. The typical sources of EMI are
equipment power cords and power service cables from electric utility companies.
Strong EMI can destroy the signal drivers and receivers in the Cisco ASR 1001-HX Router and Cisco ASR
1002-HX Router and even create an electrical hazard by causing power surges through power lines into
installed equipment. These problems are rare, but could be catastrophic.
To resolve these problems, you need specialized knowledge and equipment, which could consume substantial
time and money. However, you should ensure that you have a properly grounded and shielded electrical
environment, paying special attention to the need for electrical surge suppression.
The following table lists electrode magnetic compliance standards for the Cisco ASR 1001-HX Router and
Cisco ASR 1002-HX Router.
Table 11: EMC and Safety Standards
FCC 47 CFR Part 15 Class A
VCCI Class A
AS/NSZ Class A
ICES-003 Class A
EN55022/CISPR 22 Information Technology Equipment (Emissions)
EN55024/CISPR 24 Information Technology Equipment (Immunity)
EN300 386 Telecommunications Network Equipment (EMC)
EN50082-1/EN61000-6-1 Generic Immunity Standard
EMC Standards
UL60950-1
CSA C22.2 No. 60950-1-03
EN 60950-1
IEC 60950-1
AS/NZS 60950.1
Safety Standards
Radio Frequency Interference
When electromagnetic fields act over a long distance, radio frequency interference (RFI) can be propagated.
Building wiring can often act as an antenna, receiving the RFI signals and creating more EMI on the wiring.
Cisco ASR 1001-HX Router and Cisco ASR 1002-HX Router Hardware Installation Guide
40
Preparing Your Site for Installation
Site Cabling Guidelines
