28 CHAPTER 3: HARDWARE DESCRIPTION AND INSTALLATION
■TCP/IP software. TCP/IP is provided as part of the Windows 98, 95, NT and
Macintosh System 7.6 and later operating systems. For Windows 3.11 users,
TCP/IP software is provided on the 3Com Companion Programs CD-ROM.
Available storage space on your computer’s hard drive is not required because
nothing is installed onto your computer as part of the 56K LAN Modem setup
procedure. If you would like to copy any programs or documents from the
included CD-ROMs, ensure that you have available hard disk space.
Front Panel LED
Description The front panel provides the following LEDs.
Figure 9 56K LAN Modem Front Panel
The functions of the front panel LEDs are described in Table 4. These front panel
LEDs indicate proper operation and display 10BASE-T and analog port activity
status.
Table 4 Front Panel LED Indicator Definitions
LED Color Description
Alert Amber Operational Status. Lit during power-on self-diagnostic test or
after pressing the reset button.
Off indicates the unit has passed the diagnostic test and is working
properly.
Flashes if one or more of the diagnostics have failed or after the
unit is placed in firmware download mode and is awaiting
firmware upgrade.
PWR Green Power Indicator. Remains lit as long as power is supplied to the
unit.
AA Green Auto Answer. Indicates the 56K LAN Modem’s answer mode.
Flashes during an incoming call.
Remains lit for the duration of the call.
Off when the LAN Modem originates a call.
CD Green Carrier Detect. Remains lit if the 56K LAN Modem receives a valid
data signal (carrier) from a remote modem (such as an ISP),
indicating that data transmission is possible.
RD Green Received Data. Flashes when the LAN Modem receives data from
a remote site.
SD Green Send Data. Flashes when the LAN Modem sends data to a remote
site.
OH Green Off Hook. Remains lit when the modem has gone off hook.
TX Green Ethernet Transmit Status. Flashes green when data is being
transmitted to the Ethernet LAN from the 56K LAN Modem .
Off indicates that no data is being transmitted to the Ethernet LAN
from the 56K LAN Modem.
3 Com
RD SD TX COLL 1 2 3 4
Alert
LAN STATUS
PWR CDAA OH
56K LAN Modem
3C886