Extron electronic ISM 824 manual Cabling and RJ-45 connector wiring, Choosing a network cable

Cabling and RJ-45 connector wiring

It is vital that the Ethernet cables used be the correct type of cable, and that they be properly terminated with the correct pinout.

Choosing a network cable

Ethernet links use Category (CAT) 3, 4, 5, 5e, or 6, unshielded twisted pair (UTP) or shielded twisted pair (STP) cables, terminated with RJ-45 connectors. Ethernet cables are limited to 328' (100 m)

The cable used depends on the network speed. The ISM supports both 10 Mbps (10Base-T — Ethernet) and 100 Mbps (100Base-T — Fast Ethernet), half-duplex and full-duplex, Ethernet connections.

•10Base-T Ethernet requires, at a minimum, CAT 3 UTP or STP cable.

•100Base-T Fast Ethernet requires, at a minimum, CAT 5 UTP or STP cable.

Terminating the network cable

The cable can be terminated as either a patch cable or a crossover cable (figure 2-4) and must be properly terminated relevant to the application:

•Patch (straight) cable — Connection of the ISM to an Ethernet hub, router, or switcher that also hosts a controlling computer.

•Crossover cable — Direct connection between the ISM and a controlling computer.

Pins:

1 2 3 4 5 6 78

Side View

Insert

Twisted

Pair Wires

RJ-45 Connector

Straight-through Cable

(for connection to a switch, hub, or router)

	End 1		End 2
Pin	Wire Color	Pin	Wire Color
1	white-orange	1	white-orange
2	orange	2	orange
3	white-green	3	white-green
4	blue	4	blue
5	white-blue	5	white-blue
6	green	6	green
7	white-brown	7	white-brown
8	brown	8	brown

Crossover Cable

(for direct connection to a PC)

	End 1		End 2
Pin	Wire Color	Pin	Wire Color
1	white-orange	1	white-green
2	orange	2	green
3	white-green	3	white-orange
4	blue	4	blue
5	white-blue	5	white-blue
6	green	6	orange
7	white-brown	7	white-brown
8	brown	8	brown

Figure 2-4 — RJ-45 connector pinout tables
D	Reset button and LED — Pressing this recessed button
	causes certain IP functions and Ethernet connection settings	RESET
	to be reset to the factory defaults. The green LED above the
	button blinks a varying number of times to indicate which
	reset mode has been entered. See chapter 3, “Operation and Setup” ,
	“Resetting the unit with the reset button” section, for information on reset
	modes.
	ISM 824 Integration Scaling Multiswitcher • Installation		2-5