3Com S24x, S27x Ethernet Cable Pinouts, Additional Information Ethernet RJ-45S Connector Signals

Ethernet Cable Pinouts

Ethernet Cable Pinouts

Introduction	This cable may have a maximum length of up to 100m and must conform to the
	802.3 10BaseT specification, with a nominal impedance of 100 ohms. Category 3, 4,
	or 5 cable may be used. Category 4 or 5 is preferred.

Additional

Information

Ethernet RJ-45S Connector Signals

Refer to ANSI/TIA/EIA 568A and the following references:

•CSMA/CD Access Method and Physical Layer Specifications, IEEE standard 802.3-1992.

•Draft supplement to IEEE standard 802.3, System Considerations for Multi Segment 10B/S Baseband Networks (Chapter 13) and Medium Attachment Unit and Baseband Medium Specification, Type 10BaseT (Chapter 14), p802.3i-1990.

The following table shows the Ethernet RJ-45S connector signals.

Pin	Signal
1	Transmit +
2	Transmit -
3	Receive +
6	Receive -

Ethernet DB-15The AIU cable uses male DB-15 to female DB-15 connectors with slide latches in a Connector Signals straight-through connection.

The twisted pair combinations are 1/2, 3/6, and 4/5, and may be used for Ethernet.

This cable may have a maximum length of up to 50m and must conform to the 802.3 10BASE5 specification.

The following table shows the Ethernet DB-15 connector signals.

Pin	Signal
1	Shield
2	Collision+
3	Transmit+
4	Shield
5	Receive+
6	Ground
8	Shield
9	Collision-
10	Transmit-
11	Shield

A-6 Cables