NEC QX-S5526P - Connection by a Twisted Pair Cable; Network Connection by a Fiber-Optic Cable

Installation Guide
QX-S5500 Series Ethernet Switches
5
Network connection of the switch
Pin
10Base-T/100Base-TX 1000Base-T
Signal Function Signal Function
7
Reserve
N/A
BIDC+
Line of bi-directional data C+
8
Reserve
N/A
BIDC-
Line of bi-directional data C-
To establish normal communication, pin for transmission data has to make them match with
pin for receive data in an opposite port. When a port of one device is MDI or MDI-X, and a
port of the device opposite is already MDI or MDI-X, a crossing cable is necessary. The
MDI/MDI-X type connects the same device to a crossing cable. When MDI and the other
are MDI-X, a straight cable needs one port. A straight cable connects device different in the
MDI/MDI-X type.
When the auto-MDI/MDI-X function is effective by RJ-45 Ethernet interface, the role of the
pin is put together automatically.

NOTE:
RJ-45 Ethernet interface of QX-S5500 series is supporting auto-MDI/MDI-X function. The auto-MDI/MDI-X
function is effective at a port by default.
5.1.2 Connection by a twisted pair cable
10/100/1000BASE-T port of QX-S5500 series uses RJ-45 connector and supports
auto-MDI/MDI-X function. Use a twisted pair cable of Category - more than 5 for a network
connection of the switch.
I. Network connection procedure of the switch by a twisted pair cable
1) As occasion demands, make straight or a cross Ethernet cable.
2) A something of a twisted pair cable is connected to Ethernet RJ-45 port of the
connected switch.
3) Connect the other end of a twisted pair cable to Ethernet RJ-45 port of interconnect
equipment.
4) Check whether an LED in Ethernet RJ-45 port is normal.
5.2 Network connection by a fiber-optic cable
Figure 5-4 Flow of a network connection by an optical fiber
Connect a fiber connector
with a SFP module.
Make the SFP port
effective.
Install a SFP module in the
switch and opposite device.
5-4