3Com U.S. Robotics 56K Voice, Руководство пользователя

Страница: 16 / 168

16 C
HAPTER
1: I
NTRODUCTION
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
Description
The front panel contains the LEDs illustrated in Figure 5.
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.
Alert
Power
Message
RD AA CD SD OH RD AA CD SD OH
OfficeConnect Dual 56k LAN Modem
1 TX COLL 2 3 4
LAN Status MODEM 2 MODEM 1