PictureTel III ISA manual Cable Specifications, TypeExample

Cable Specifications A-3

Cable Specifications

In order to maintain compliance with the limits of a Class B digital device, 3Com requires that you use quality interface cables when connecting to this device. Changes or modifications not expressly approved by 3Com could void the user’s authority to operate this equipment. Examples of supported cable types are shown in Table A-2.

Table A-2Supported Cable Types

TypeExample

Unshielded twisted-pair 100-ohm

Category 3 LAN and high-speed data cable, for example, Anixter CM-00424BAG-3 or equivalent

Category 4 extended distance LAN cable, for example, Anixter CM-00424BAG-4 or equivalent

Thin coaxial	RG58	A/U or C/U (50 ohm ± 4)
Thick coaxial	RG59	(50 ohm ± 2)

The 10BASE-T cable you use for establishing a connection to the network should not be used for any other purpose. It must be dedicated to the link between the NIC and the network.

For complete cabling details, refer to the IEEE 802.3 specification, section 8.4, “Coaxial Cables and Electrical Parameters.”