Asynchronous Terminal Connections; Interference Considerations - Cisco ASR 1000 Series Installation And Configuration Manual

Chapter 3 Preparing Your Site for Installation

Asynchronous Terminal Connections

The route processor provides a console port to connect a terminal or computer for local console access.
The RP1 also provides an auxiliary port to connect to a modem for remote dial-in console access.
Both ports have RJ-45 connectors, support RS-232 asynchronous data, and have distance
recommendations specified in the IEEE RS-232 standard.

Interference Considerations

When wires are run for any 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 1000 Series Router system.
Electromagnetic Interference
All 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 1000 Series 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.
Table 3-8
Services Routers.
Table 3-8
EMC Standards
CE marking
OL-13208-03
lists electrode magnetic compliance standards for the Cisco ASR 1000 Series Aggregation
EMC Standards
Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide
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
UL60950-1
CSA C22.2 No. 60950-1-03
EN 60950-1
Site Planning
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