Allied Telesis AT-TS90TR - Manual (Page 25)

Installation
14
If the power-up diagnostics fail, the unit may also stop, or “hang”, with a
diagnostic code displayed on the Activity LEDs and the Fault LED may not
be turned on. Again, try power-cycling the unit before contacting ATI
Technical Support.
Connection to other
units in a TurboStack
The AT-TS90TR is automatically connected, via the Segmented
Backplane, to the devices installed in the TurboStack chassis. The default
autosensing configuration of your AT-TS90TR is for front panel
connections to have precedence.
In the default autosensing mode, a connection to the front panel port
(sensed by receiving a 10BASE-T link pulse through the front panel port
connector) disables the connection to the corresponding device in the
TurboStack chassis connected via the Segmented Backplane.
The front panel connections and their corresponding devices are position
sensitive. The top position in the TurboStack corresponds to the first
(leftmost) connector in the 10BASE-T ports, the next position down
corresponds to the second 10BASE-T port and so on. This connection is
hardwired into the Segmented Backplane and cannot be modified.
If there is no connection to the front panel, autosensing in the AT-TS90TR
Management Software recognizes the device plugged into the TurboStack
chassis Segmented Backplane and will make an automatic connection
between the device and the corresponding port on the AT-TS90TR switch.
Interface Autosense
Only one connection at a time may be made to any port in the AT-TS90TR
switch. Since the first six ports (ports 1 through 6) have two possible
connections, front panel and Segmented Backplane, this potential conflict
is resolved with the Interface Autosense logic.
10BASE-T ports 7 and 8 are not connected to the Segmented Backplane so
are not affected by the Interface Autosense setting. You may only make
connection to these ports via their front panel RJ-45 connectors
Front Panel if Link Online. In this default state, the unit is connected
to other units installed in the TurboStack chassis via the Segmented
Backplane unless there is also a connection to the AT-TS90TR switch via
the front panel RJ-45 connector. If there is a front panel connection, the
connection made via the front panel takes over the port and any connection
to the port via the TurboStack’s Segmented Backplane is disconnected.
Backplane if Slot Occupied. The second option reverses the logic so
that connections via the segmented backplane take precedence. Inserting
a unit into the Segmented Backplane make connections to the port
corresponding to the slot accessible only via the Segmented Backplane
and disconnect any connections made via the front panel to the
corresponding front panel connection.
For more detailed information on how to modify the default autosensing
configuration, refer to your TurboStack AT-S6 Firmware Module for AT-
TS90TR Switch Operations Manual.
Note
Note