Sagem 4450E - Manual (Page 102)

CHAPTER 5
3P@C Installation Manual
Page 5-1 Reproduction and communication in any form prohibited without the written permission of SAGEM SA
5. Suggestions to Ethernet Cabling
To lessen the possibility of equipment damage and performance deduction due to electromagnetic wave and
lightning interference, the following recommendations are offered for 100 Mbps Ethernet port cabling in actual
engineering:
5.1. Requirements for Cable Types
Cables for 100 Mbps Ethernet port connection must be Category-5 or Enhanced Category-5 cables. On the
surface of the twisted pair, you can often find some symbols like “ 24AWG CAT5”. “CAT5” represents
Category-5 twisted pairs and “CAT5E” represents Enhanced Category-5 twisted pairs.
5.2. Requirements for Cabling Length
Length of 100 Mbps Ethernet cabling cannot exceed 100 meters, that is to say, the cable length from a device to
a networking device or subscriber’s PC must be not more than 100 meters, as shown in the figure below.
Cabling length of more than 100 meters influences effective transmission of data.
Figure 5-1 Requirements for cabling length
Interconnected
device
Device
Ethernet
cable
Ethernet
cable
Subscriber’s PC
5.3. Spacing Requirements for Indoor Cabling
To keep effective data transmission and lessen interference of coupling high-frequency electromagnetic wave
and lightning, it is recommended that in indoor cabling, Ethernet cables should keep an appropriate spacing from
other pipelines and nearby electric equipments such as electromotor and transformer that may cause high-
frequency electromagnetic interference. For the spacing requirements for indoor cabling, see 0 and 0.