3Com 125ST Installation Manual - page 6
1-6
C
HAPTER
1: I
NTRODUCTION
TO
THE
H
OME
C
ONNECT
ADSL M
ODEM
E
THERNET
6 Determine if you want the MDI/X switch “out” or “in”. The
MDI/X Switch swaps the transmit (Tx) and receive (Rx)
signal pairs on the Ethernet port. The MDI/X button must
be pressed “in” to use the port for connection to a
workstation. When the MDI/X button is “out”, you can
connect to a non-cascade port on another hub.
7 Plug one end of the power adapter into a wall socket, and
connect the other end of the cable to the rear of the
HomeConnect ADSL Modem Ethernet.
What are the Boot Options?
The 3Com HomeConnect ADSL Modem Ethernet has a set
of 4 numbered DIP (Dual Inline Package) switches that can
be used to select a pre-programmed configuration. One of
the pre-programmed configurations may match the
settings required by your service provider. Please
check with your service provider. If so, installation is as
simple as setting the DIP switches and powering on the
unit. If not, you can still easily configure the unit using a
serial console connection.
The following DIP switch combinations are valid:
Boot options only affect the operation of a unit which does
not presently have any configuration settings (i.e., the unit
is new, the Configuration Reset button has been pressed,
Table 1-1 DIP Switch Modes
DIP Switch
Mode
1
2
3
4
VPI/VCI
off
off
off
off
Unconfigured Mode (CLI
configuration required)
ON
off
off
off
0/33
off
ON
off
off
0/35
ON
ON
off
off
8/35
off
off
ON
off
0/38
ON
off
ON
off
0/33-35
off
ON
ON
off
0/33-38
all other settings
Unconfigured Mode (CLI
configuration required)