3460 Fast’R

A-17

Panel Indicators and Switches

Accessway enclosure cards and stand-alone modems have the following

front panel indicators, except where noted. On a dual-modem card, each

modem has a set of indicators. Vanguard 3460 V.34 Daughtercard

modems have only the MR and OH indicators.

Front Panel Interface

Indicator Description

MR
Modem Ready/
Test Mo de
•On: modem is ready to interwork with computer
•Flashing: Modem is in V.54 test mode
TR
Transmit/
Receive
(Data Terminal
Ready)
On: computer is asserting DTR (Circuit 108) to modem
OH
Off Hook
(connected to
phone line)/
Ring Indicator
On:
•Regular operation: mod em is connected to dial line
•Restoral operation: when regular operation is configured
for leased-line or dial-line operation, and modem is
operating on restoral dial line: modem is connected to
dial line
Flashing: modem receiving Active Ring
Off:
•In dial confi guration: no call in progress, modem is
disconnected from telephone line
•In leased-line configuration: mo dem is connected to
leased line
CD
DataCarrier
Detect
On: modem is receiving a valid carrier signal from a
remote modem
RD
Receive Data
Flashing: modem is transferring data received from a
remote modem and command responses to computer
SD
Send Data
Flashing: modem receiving transmit data and commands
from computer