3Com MSR 20, MSR 30, MSR 50 manual Interface Attributes, Mdi/Mdix

40CHAPTER 2: SMART INTERFACE CARDS

network directly. SIC-4FSW-PoE/DSIC-9FSW-PoE interface cards can supply power to powered devices (PDs) through power over Ethernet (PoE).

Functions supported by interface cards are as follows.

■Effective transmission distance of 100 meters with category-5 twisted pair cables (both crossover and straight-through);

■Effective transmission distance of 100 meters between any interfaces with category-5 twisted pair cables (both crossover and straight-through);

■Operating speeds of both 100 Mbps and 10 Mbps and autosensing;

■Both full duplex (in common use) and half-duplex operating modes.

Interface Attributes

Table 14 Interface attributes of the SIC-4FSW/SIC-4FSW-PoE/DSIC-9FSW/DSIC-9FSW-PoE

	Description
	SIC-4FSW/SIC-4FSW-PoE	DSIC-9FSW/DSIC-9FSW-PoE
Attribute	interface card	interface card
Connector	RJ-45
Interface type	MDI/MDIX
Number of	Four 100 Mbps RJ45 connectors	Nine 100 Mbps RJ45 connectors
connectors
Cable	Standard (straight-through)/cross-over Ethernet cable
Operation mode	10/100 Mbps autosensing, full/half duplex

n MDI stands for Media Dependent Interface of the Ethernet. Normally, the interfaces on the network cards belong to this type. MDIX stands for Cross Media Dependent Interface, which is usually adopted on HUBs or LAN Switches.

Interface LEDs The following figure illustrates the SIC-4FSW/SIC-4FSW-PoE panel.

Figure 34 SIC-4FSW/SIC-4FSW-PoE panel

The following figure illustrates the DSIC-9FSW/DSIC-9FSW-PoE panel.

Figure 35 DSIC-9FSW/DSIC-9FSW-PoE panel

On the panel, each port corresponds with one green LED. The following table describes the LEDs on the panel.