Cisco Systems ASR 1000 Series Asynchronous Terminal Connections, Interference Considerations, Emc

Chapter 3 Preparing Your Site for Installation

Site Planning

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 3-8lists electrode magnetic compliance standards for the Cisco ASR 1000 Series Aggregation Services Routers.

Table 3-8	EMC Standards
EMC 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
CE marking		UL60950-1
		CSA C22.2 No. 60950-1-03
		EN 60950-1

	Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide
OL-13208-03		3-13