3Com S24x, S27x Used, Port Number Use, DIMs without a Cable Adapter DIMs with a Cable Adapter

Hardware Components

How Ports Are The following table describes how the ports are used.

Used

Port Number	Use
1, 2, and 3	Recommended for network port connection or cluster
	connectivity. Ports 1 and 2 have variable interfaces, depending
	on the DIMs.
4	Ethernet AUI port for routing applications.
6	Control Terminal Port (CTP). When operating as an
	asynchronous interface, it can support data rates up to 115.2
	kbps. Default CTP configuration parameters are 9600 baud,
	8-bit characters, 1 stop bit, no parity. This is an EIA 232-D
	DCE port using a DB-25 connector.

DIMs without a Cable Adapter

DIMs with a Cable Adapter

Ports 1 and 2 support a DSU DIM without the use of cable adapters.

If cable adapters are used, Ports 1 and 2 can support the following DIMs:

•High Speed (V.36)

•V.35

•V.11/ISO-4903

Each DIM port can be configured independently of the other port. For example, you can install: two V.35 DIMs; one V.35 DIM and one V.11 DIM; or two V.11 DIMs.

The cable adapter pinouts are described in Appendix A, Cables.

About the PathBuilder S24x, 26x, and 27x switch 1-15