3Com 7750 Series, Installation Manual

Page: 16 / 74

16 C
HAPTER
1: S
WITCH
7750 C
OMPONENTS
Table 15 describes the 4-port 10/100/1000BASE-T submodule LEDs.
Table 16 lists specifications of the 4-port 10/100/1000BASE-T submodule.
See “Electrical Port Connector” on page 68 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:
■
48-port 10/100BASE-T FE PoE Module (3C16891)
■
48-port 10/100/1000BASE-T PoE Module (3C16890)
■
48-port 10/100BASE-T Auto-sensing FE Module (3C16860)
■
48-port 10/100/1000BASE-T Module (3C16888)
■
24-port 100BASE-FX MMF FE Module (3C16861)
■
20-Port 10/100/1000BASE-T Module (3C16863)
■
20-Port 1000BASE-X-SFP Module (3C16862)
■
8-port 1000BASE-X GBIC Module (3C16858)
■
8-port 10/100/1000BASE-T GE Module (3C16859)
■
1-Port 10GBASE-R-XENPAK Module (3C16875)
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.
■
You must select I/O module port cables that are compatible with each installed
I/O module
Table 15
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.
Green flashing — Data is being transmitted.
Table 16
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)