CentreCOM 3600 Series Hub/Repeaters
45
By setting the MDI/MDI-X switch to MDI, you can connect two hubs via
standard straight-through cable. The switch affects Port 1 only. You can
continue to use Ports 2 through 24 for network connections via straight-
through cable, no matter which way you set the MDI/MDI-X switch.
If you connect a straight-through cable (or any cable for that matter)
between two hubs (or any two nodes) and the network LEDs do not
indicate a link condition, you can change the MDI/MDI-X switch. The hub
will not be damaged if the MDI switch is in the wrong position.
Port Indicators
The port indicators on the AT-3600 Series hub front panels provide visual
diagnostic and activity information for network analysis. The AT-3624TR
provides a central bank of indicators for box-level monitoring.
As shown in Figure 46, each 10BASE-T port supports the following
indicator functions with one dual-color front panel LED per port:
Figure 45:
MDI/MDI-X Switch
POWER
RS-232
TERMINAL PORT
APPLIQUÉ PORT
OFF ––––––––––––– NO LINK
INDICATOR STATUS ––– PORT STATUS
ON GREEN –––––––– LINK
FLASHING GREEN –– RECEIVING
ON AMBER ––––––– PARTITIONED
FLASHING AMBER – COLLISION
10 BASE-T PORT ACTIVITY
1
3
5
7
9
11
13
15
17
19
21
23
2
4
6
8
10
12
14
16
18
20
22
24
X
X
X
X
X
X
X
X
X
X
X
X
2
4
6
8
10
12
14
16
18
20
22
24
1
3
5
7
9
11
13
15
17
19
21
23
3624TR
CentreCOM
TM
IEEE 802.3/ETHERNET 10
BASE-
T
24 PORT HUB
/REPEA
TER with Network Management
MDI
MDI-X
MASTER
POWER
FAULT
STATUS
AUI
X
X
2
4
1
3
MDI
MDI-X
Switch set
to enable
interrepeater
connection
Figure 46:
AT-3624TR Port
LEDs
OFF ––––––––––––– NO LINK
INDICATOR STATUS ––– PORT STATUS
ON GREEN –––––––– LINK
FLASHING GREEN –– RECEIVING
ON AMBER ––––––– PARTITIONED
FLASHING AMBER – COLLISION
10 BASE-T PORT ACTIVITY
1
3
5
7
9
11
13
15
17
19
21
23
2
4
6
8
10
12
14
16
18
20
22
24
