3Com Dual 56K manual Color Description

16CHAPTER 1: INTRODUCTION

Hardware Description The following is an overview of the Dual 56K LAN Modem hardware, including the function of the front panel LEDs and back panel connectors.

Front Panel LED The front panel contains the LEDs illustrated in Figure 5.

Description

Message

MODEM 1

MODEM 2

LAN Status

AA

CD

RD SD

OH

AA

CD

RD SD

OH

TX

COLL 1

2

3

4

Alert Power

OfficeConnect Dual 56k LAN Modem

Figure 5 Dual 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 analog modem and Ethernet 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 that 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.
Power	Green	Power Indicator. Remains lit as long as power is supplied to
		the unit.
Message		Not implemented.
AA (MODEM 1 or 2)	Green	Auto Answer. Shows the answer status for Modem 1 or 2,
		as follows:
		■ Flashes during an incoming call.
		■ Remains lit for the duration of the call.
		■ Off when the LAN Modem originates a call.
CD (MODEM 1 or 2)	Green	Carrier Detect. Remains lit for the indicated modem if the
		Dual 56K LAN Modem receives a valid data signal (carrier)
		from a remote modem (such as an ISP), indicating that data
		transmission is possible.
RD (MODEM 1 or 2)	Green	Received Data. Flashes when the indicated modem receives
		data from a remote site.
SD (MODEM 1 or 2)	Green	Send Data. Flashes when the indicated modem sends data to
		a remote site.
OH (MODEM 1 or 2)	Green	Off Hook. Remains lit when the indicated modem has gone
		off hook.
TX	Green	Ethernet Transmit Status. Flashes green when data is being
		transmitted to the Ethernet LAN from the Dual 56K LAN
		Modem.
		Off indicates that no data is being transmitted to the Ethernet
		LAN from the Dual 56K LAN Modem.