3com 3C16894 4-slot Chassis User Manual

Page of 80
14
C
HAPTER
 1: S
WITCH
 7750 C
OMPONENTS
Table 14 describes the 4-port 10/100/1000BASE-T submodule LEDs.
Table 15 lists specifications of the 4-port 10/100/1000BASE-T submodule.
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45 
connector and MDI/MDI-X pinout details.
I/O Modules 
The Switch 7750 provides multiple slots for I/O modules below the Fabric slots. 
The following I/O modules are supported: 
100Base-FX SFP mode (3C16865915)
Consider the following when selecting I/O modules: 
You can configure several I/O modules of the same type
Any combination of I/O modules can be inserted but only PoE I/O modules 
provide the features of power over Ethernet.
Table 14   
4-Port 10/100/1000BASE-T Submodule LEDs
 
LED
Description
LINK
Off — The link is not operating.
 
On — The link is operating normally.
ACT
Off — No data is being transmitted or received.
 
Green flashing — Data is being transmitted or received.
Table 15   
4-Port 10/100/1000BASE-T Submodule Specifications 
Specification
Description
Connector type
RJ-45
Number of ports
4
Port speed
1000 Mbps full duplex
 
100 Mbps half/full duplex
 
10 Mbps half/full duplex
 
MDI/MDI-X auto-sensing
Cable and maximum 
transmission distance
Category 5 twisted pair up to 100 m (328 ft)