EXPRESS 8-PORT MUX
7
2.3 Connectors and Indicators
The Mux’s LEDs and connectors are described below. Refer to Figures 2-1 and 2-2 to locate each connector or
indicator.
Figure 2-1. The Express 8-Port Mux’s Front Panel.
Figure 2-2. The Express 8-Port Mux’s Rear Panel.
Power LED
On when the Express 8-Port Mux is powered up.
TX Activity LED
On when a signal is transmitted to the fiber optic aggregate link.
RX Activity LED
On when a signal is received from the fiber optic aggregate link and the
Mux synchronizes to it.
Polling Group Status LEDs
The upper green LEDs are express mode indicators. These LEDs activate
when an express signal is detected, and they remain on until a 1-Mbps signal
is detected or a system reset occurs. The lower green LEDs are data activity
indicators. These LEDs activate when a signal is present.
Polling Group Connectors
There are two polling groups. Each polling group has been divided into two
port groups. Polling group #1 consists of ports 0 through 3 (port groups A
and B), and polling group #2 consists of ports 4 through 7 (port groups C
and D).
Ports within a polling group must be connected to ports from a common
controller.
IIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIII
POWER
Express 8 Port Mux
2X
6
GROUP D
2X
7
2X
0
GROUP A
2X
1
2X
4
GROUP C
2X
5
2X
2
GROUP B
2X
3
TX
LINK
STATUS
RX
• • • • • • • •
Power
Activity LEDs
(TX and RX)
FCC label
DB25
Configuration
switches
Fiber optic
link
DC power
connection
External power supply
Product
identification
label
Polling Group #1 Status
LEDs and Connectors
Polling Group #2 Status
LEDs and Connectors
